auto cad book

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Index Part 1: Autocad interface and preliminary settings - Autocad inteface - Introduction to Toolbars - Preliminary settings Part 2: We begin to draw ... - Line - Ortho - Units of Autocad - Coordinates of Autocad - UCS - Offset - Window and select Delete - Trim and Extend - Introduction to Zoom - Fillet and Cima - Tools zoom - Rebuild design - Saving and opening files  Part 3: Object Snap and editing tools - Object Snap - Move 

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Index

Part 1: Autocad interface and preliminary settings

- Autocad inteface

- Introduction to Toolbars

- Preliminary settings

Part 2: We begin to draw ...

- Line 

- Ortho 

- Units of Autocad 

- Coordinates of Autocad 

- UCS 

- Offset 

- Window and select Delete 

- Trim and Extend 

- Introduction to Zoom 

- Fillet and Cima 

- Tools zoom 

- Rebuild design 

- Saving and opening files 

Part 3: Object Snap and editing tools 

- Object Snap 

- Move 

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- Color 

- Linetype 

- Linetype Scale 

- Line width 

- Layers 

- Properties 

- Match Properties 

Part 6: Adding text and dimensions 

- Text Style 

- Single Line Text 

- Multi-line Text 

- Text Editing 

- Drawing dimensioning 

- Linear Dimension 

- Aligned Dimension 

- Radius 

- Diameter 

- Angle 

- Dimension Style 

- Dimension Update 

- Edit Dimension Text 

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- The "Distance" command 

Part 7: Printing

- The Print command 

- Plot Style 

- Printer Properties 

- Path to auto-save files 

Part 8: Autocad 2010 Interface 

- Autocad LT 2010 Interface 

- Conclusions 

Part 1

AUTOCAD INTERFACE AND PRELIMINARY SETTINGS

I will give to assume that the program is already installed on your computer and ready foruse.If you do not have the program you can download a trial version from Autodesk's websiteat:

http://usa.autodesk.com/adsk/servlet/pc/index?siteID=123112&id=13706332 

When you start Autocad will be presented with a window similar to the one below.

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And here is our program, you see similar to almost all Windows programs comes with a rowof pop-up menu at the top with the commands "file, edit, Viev, insert" and so on. (File, edit,view, post, etc.. "In Italian version), and several "toolbar" or toolbars, all those buttons,which correspond to various commands that we will see below, which are divided intogroups, "toolbar", which can be customized to make them visible or invisible, and move intoposition.In the picture above this interface has already been partially done, so you might see thingsarranged differently from how have you on your screen.Do not worry about it for now, also depending on the version of Autocad icons may lookslightly different, but basically the symbols represented, at least for the main controls arethe same.

Then we have the central area, that the drawing area (usually a black background), withthe center of the cursor "or" crosshairs "controlled by the mouse.In addition to this in the bottom left, still in the drawing, you should see an icon with twoarrows and the letters X, YThis is the icon called "UCS" and represents the coordinate axes X, Y on which you movethe crosshairs.

A large part of very important and I ask you to remember is the "command line" or thecommand line, which is the window at the bottom on two or more lines at the bottom whereyou see "command" (command).

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It 's very important especially in the beginning you get used to observe what is written inthis window when you run the command, Autocad fact every time you use a command hereshows you the steps to run it.

Introduction to "Toolbars"

Well, back to the "toolbar" and see the first two to be taken into consideration.

The "draw" toolbar

And the "modify" toolbar

Ideally you should already be visible to the sides of the canvas, perhaps a right, left andarranged vertically.If not, move the pointer over any button of the toolbar and click on this with the RIGHTCLICK of mouse, will bring up a menu like the one shown in the picture.

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The entries in this menu correspond to the various "toolbar" visible and invisible, and as

you have probably realized by this entry can be enabled or disabled.Click on the items "draw" and "modify" to make this toolbar visible.When they appear in the drawing area you can move by clicking and holding the button onits top in blue and drag them (one at a time) on the left side of the screen, at some pointyou'll see that you will have automatically vertically, this Release the mouse buttonsistrum.

In this way, you can customize the interface of the program as desired by activating thetoolbar that you use frequently, and placing them where you want it right at the top left orabove the drawing area.

Preliminary Settings

Before you start drawing we see a couple of other things.Click your mouse on the menu "Tools"> "Options .." as in the image below.

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You'll see a window containing a number of tables from which you can set a whole series of 

things such as background color, the command line, and other parameters that affect theoperation of the program.

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Ok, now click the "Open and Save" and under the "save as" open the popup menu byclicking the arrow to the side.

It's the one highlighted in blue in the previous image...

In this menu you'll see some entries with the words:AutoCAD2007 drawing (*. dwg)AutoCAD2004 drawing (*. dwg)AutoCAD 2000 Drawing (*. dwg)etc..

These entries written on the side (*. dwg) represent the types of files that our program canopen and save. More specifically, for example by setting this item to "AutoCAD 2000" set

autocad that every time you save a drawing that we did or we open, it is saved in AutoCAD2000 format.What does this mean?As you might know there are different versions of AutoCAD and comes out every 1 -2 yearsa new, the latest "release" is the 2011.

(Of this, like the previous ones, there is a version LT (light) and the normal, full. The light version does not have the ability to create designs in 3D (three dimensional), but can open and view them, while with the most comprehensive and expensive full version canbe created through tools and additional commands). 

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The most important difference between the "release" of program is that older versions cannot open drawings created by the later versions , unless those who have saved the file hasnot set his program for saving in a old version, as explained before.This is very important to know especially when collaborating with other users and you haveto give or receive drawings.

Beyond this, every file saved from AutoCAD will be of type "dwg", the files as normallyautocad manage have "dwg" extension.For example, if we save a drawing and call it "Plan" or "kitchen" will be automatically savedin this way:

plan.dwgkitchen.dwg

Where the point. separates the filename from its extension, which identifies a file type toanother.There are indeed many types of files with many different extensions:

"Pianta.doc" would be a text document"Pianta.bmp".Gif, .Jpg, .Tiff and others, would rather the images.

I digress a bit 'from autocad but if you're not already aware, this information will be useful.The "dwg" however, is not the only type of file that can be read and saved from AutoCAD,but we will see this later.

Then return to the Options window autocad, and always in the "open and save.look further down the "Automatic Save" (Auto-Save), which should already be enabled, andthe window of the "Minutes Between saves" (Minutes of each save) type such as 10.In this way, autocad perform an automatic save every 10 minutes, the drawing you'reworking on and put it in a specific folder.

This feature is very useful for not losing your work as you'll see that sometimes theprogram crashes, or leaves the current or accidentally delete the file you were working.

You will then be possible (and useful) to go back to the file that was saved in AutoCADautomatically, as we shall see ....

We are now going to set the right click of the mouse.Also in the options window, click on the table "user preferences (user preferences) andthen again click on the button at the top left" right-click customization (customization rightmouse button).In the window that appears, activate the first box for each item, click on it, for the followingitems.

-Default mode, edit mode, command mode- 

According to the release of AutoCAD you have, youcan alternatively check the first entry is in thewindow, turn-on time-sensitive right.click.Finally, click on "Apply & Close" (apply and close).

In this way, clicking the right mouse button, aftercompleting a command, AutoCAD will repeat it.

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If you just finished drawing a line for example, after clicking the right button will berepeated the command "line", and so for all other commands.

This feature helps a lot to speed up the work, used to use it during the course often put into practice.

On the Table "display" click on the "colors" , will open the window you see below on whichto set the colors of the program interface.

On this window select the central area at the top, the first item in the "background" andthen open the color menu on the right and select the desired color for the background.Usually used black.After you click "apply and close" to assign all'autocad changes made to the colors.

Now click "OK" at the bottom of options window to close it and accept the changes.

What has been said so far are general settings to be done only once, the next time you openAutoCAD will not need to repeat them.

NB if the autocad mean any reason for crashes before you have it closed and reopened, the settings will be lost as they are made. 

SUMMARY:

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Open Autocad customize the interface and activating the toolbar and fixed to the screen.(We have seen thus far, "draw" and "modiify).

Open the Options dialog from the "tools> options .." and set the auto-save if necessary setthe save to older versions. (For the moment leave it as it is with the default setting).

Also in the options dialog to set preferences for the right mouse button, the table "userpreferences."

From the chart display options if you prefer set the background color to black.

Part 2

START TO DRAW

The command "LINE".

Well at this point it's time to start drawing.On the "draw" toolbar click the left mouse button on the command 'line'

is the key with this icon = LINENow look what came written in the "command line".

The program suggesting steps that have to do to create a line, in this case is asking you to"Specify first point" (to specify the first point of the line).Now click with the mouse in a point mean any of the canvas and then looks back at whatappears in the "command line":"Specify next point" (specify the second point).Now move the mouse on one side and you'll see that you are creating a line, before clickingthe second test with the mouse to rotate around the first point you've already laid down,you'll see the line that follows your movement in all directions .Click and then at another point in the drawing slightly away from the first, doing so willcreate the first line between the two points just defined.

At this point, the program gives you the opportunity to continue to create more connectedline segments to the first, by clicking with the mouse in other areas of the screen.To stop the command and end the line, click the right mouse button, or press the "enter"key on your keyboard.You can resume the command line just completed by pressing one of two buttons (right-

click or enter), or by clicking again on the "line" the toolbar.

To create a line and then it took at least four clicks of the mouse:beginning of the command, the first point, second point, the end of the control (Right).To run the various commands of AutoCAD you must use different combinations of mousebuttons that we will see from time to time, with practice you will become automatic andruns them without thinking.

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H owever, if during the execution of this or any other commands you seem to have somewrong step by clicking the "esc" key on your keyboard to quit the command and you can start over. 

The latest versions of AutoCAD may be that during the execution of commands and information to be displayed next to the numbers of cross-hairs, those who repeat the"command line", as well as others. It's called "dynamic input and can be turned off by clicking on the" DYN "bottom of the screen, under the command line. Personally I find it annoying but it is subjective, however, should turn it off initially. 

The ³ORTHO´ function .

Now try to press the key "F8" on your keyboard and get the command line (line), click toestablish the first point and then try to move the mouse back to it, you'll see that now theline no longer moves in all directions but only in the vertical and horizontal.Click again to the second point of the line and then with the right to end the command.Continue to press several times F8 and watch the "command line" and other small buttonsbelow it.Press "F8" then turn on or off the "ortho", or alternatively you can click on the button underthe "command line".This function key allows us to define with precision vertical and horizontal lines, but is alsouseful to move or copy items in a right angle with each other in technical design andtherefore should be used whenever it can be activated or deactivated at any time, evenduring the execution of a command.Drawing with AutoCAD you should not go to the event, although it seems to do so, shouldnot be drawn without vertical or horizontal "ortho" activated.

Units of Autocad.

Resume 'line' command and with "ortho" mode activated, decide the first point of the lineon the screen, then move the mouse on the right to create a horizontal line.Now instead of clicking the second point of the line, dial a number with the keyboard, such

as 100 and then press Enter or click right twice to confirm and exit the command.

As you understand you have just made a long line "100", but what is this value...?For Autocad are 100 units, but you decide how to draw where they could be 100millimeters, centimeters or meters.It also depends on what you're drawing so there may be 100 mm of a metal object to drawon a locksmith, for example, was 100 cm if the side of a wooden table, or 100 meters of land for the fence.

Generally I'm happy with the cms, but it is good to learn how to handle various situations.

The thing to keep in mind however is that in Autocad we must generally think to draw infull scale 1:1 !I mean if I have a room of 4x4 meters and i draw considerations in cm, draw the long wallsof the 400 units, which will consider just "cm", or 4000 units, which will consider "mm".In general, you must draw by entering the actual measurements of what you represent,except in the case of magnified details you'll have to do on the same table.

It will be at the time of print design that will set a scale, (to the plot) as needed, and herethings will change in the units with which we have interpreted the drawing (cm or mm.).Let's say, for the print settings, it might be more correct to draw considering the "mm", butwe'll talk about this in due course.

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Setting units in the "Format" menu.

Let's then see another important approach to manage units.From the menu "format" , click on "Units .."

Units of Autocad.

Resume still command line mode and the "ortho" activated decide the first point of the lineon the screen, then move the mouse on the right to create a horizontal line.Now instead of clicking the second point of the line, dial a number with the keyboard, suchas 100 and then press Enter or click right twice to confirm and exit the command.

As you understand you have just made a long line "100", but a hundred things ...?Autocad for a hundred units, but you decide how to draw where they could be 100millimeters, centimeters or meters.It also depends on what you're drawing so there may be 100 mm of a metal object to drawon a locksmith, for example, was 100 cm if the side of a wooden table, or 100 meters of land for the fence.

Generally I'm happy with the cms, but it is good to learn how to handle various situations.

The thing to keep in mind however is that you do not run Autocad in the design has been toscale!

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I mean if I have a room of 4x4 meters and design considerations in cm, draw the long wallsof the 400 units, which will consider just "cm", or 4000 units, which will consider "mm".In general, then you draw by entering the actual measurements of what you represent,except in the case of magnified details you'll have to do on the same table.

It will be at the time of print design that will set a scale, "the press" as needed, and herethings will change in the units with which we have interpreted the drawing (cm or mm.).Let's say, for the print settings, it might be more correct to draw considering the "mm", butwe'll talk about this in due course.

Setting united in the "Format" (Format) .

Let's then see another important approach to policy units.From the menu "format" (format), click on "Units .." (Unity)

In the window that appears, click on the popup menu items "length" and "angle",respectively, sets "Decimal" and "Decimal Degrees" , as in the picture.

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As you'll notice AutoCAD can be set for different types of units, such as "inch", whichcorrespond to the "Architectural".

In our case the decimal units should be used for both the lengths to which the corners.

Attention: the unit settings menu does not apply in a general format for the program, but inthis case affect one individual "files" that we'll made.

Click "OK" to confirm and close the window.

We will back on this when we print our design .

The "coordinates" of Autocad

Let us now see the "coordinates" of Autocad, even though they aren't crucial in simpledesigns, but it is still useful for understanding the operation of the program.If you look at the bottom left, under the command line, as you move the mouse on thedrawing you'll see the numbers move fast.These numbers represent the XY coordinates of where the cursor is located.By clicking on the mouse, enable or disable the coordinates.A line drawn on the canvas will therefore have the X and Y coordinates for each of the twopoints that define the beginning and the end.

Basically we are drawing on a Cartesian plane.

L¶UCS

We have seen that the UCS symbol represents the XY axis of that "Cartesian plane" onwhich we are designing and using the "ortho" we can constrain the Autocad drawingparallel to these axes.

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If we wanted to draw for example 45 ° we can rotate the axis of the UCS.To do this just type in the letters on the keyboard UCS and then press the enter key.After typing the letter Z and then press Enter yet.

The letter Z indicates the third axis, it would be projected toward our eyes and it is the pivot around which rotate the axes X and Y. 

Type 45 hours and then press Enter yet.As you can see the UCS is rotated and with it the slider design, the command is completed.Drawing now "ortho" active we will be constrained to 45 °

I now repeat the command, writes UCS and press Enter twice in a row, the UCS will bereported to the inclination of origin. Simple no?We repeat again, type in UCS and then hit enter, now enter a E instead of Z, then hit enter.The cursor changes to a selection handle, if we have a slanted line on the design andselection, clicking on the mouse, the UCS will catch on that line.

To bring it back to the origin, as before repeating the command and press Enter twice in arow, or type a W instead of Z and then enter.

³OFFSET´ command.

Until now we have a line drawn vertically or horizontally, the length of 100 units; imaginethat they are centimeters.Let us now see a new command "Offset , we find that this function on "modify" toolbar"

and has this icon

It allows us to make copies parallel to a line, or concentric in the case of a circle or ageometric figure, one side or the other to the line of origin.

Click on the "offset" and look at the "command line", the program asks:"Specify offset distance" , type 50 on the keypad and press "enter".

At this point the program asks us where we want to do the offset line, appears on thecommand line says "select object to offset" and you'll notice how the cursor turns into asmall square.You can then click on the line after you created earlier and click again on either side of thisanywhere in the drawing, it will create a copy of the first line at a distance of 100 units aswe have stated above.You can now click the right mouse button (or hit Enter on the keyboard) to exit thecommand offset, or continue by selecting one of the lines and still make others equidistantoffset.

Please note that running two or more offset of the same line in the same side, we'll createoverlapping lines, we will see one but are actually more, is a classic mistake by trying toavoid. 

Then:

A click on the command , Enter the offset distance and press enter to confirm it. Click theobject to copy and then click again on either side of this, to create the copy, repeat theselast two steps to make other offsets or click the right button to enter and exit thecommand.

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Window selection and deletion.

If you want to select the lines created click the bottom right corner of the canvas and thenagain in the top left.Doing so will create a "selection window" within which you must include all or part of thelines to select.

You can also click the window first and then top to bottom and from left to right, butbeware, in this last case is different because it will select only the objects thatare entirely contained within the window.

In later versions of Autocad this selection box is colored in, respectively, green or blue, justto highlight the difference.

Without this, the lines are selected (and become slightly dotted the blue squares appear at

the top and center), now press the "Del" key on the keyboard or the delete key on themodify toolbar.

You can also do the reverse, first activate the command "delete" button on the toolbar, thenclick the selection box and press "enter" to cancel.

Make some tests of controls that have been described, (line, offset, window selection anddelete).

³Trim´and ³Extend´ commands .

We see two other important functions, commands "Trim" and "Extend".These commands are on the "modify" toolbar and have the following icons:

= Trim.

= Extend

Let's see how to put them into practice.With the command line, draw five segments, like those in the following figure.

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Extend

Now click on the command widen .On the command line is written "select objects" and the cross-hairs is changed to aselection handle.Click on the right vertical line on the last hour, then click the right mouse button to confirmyour selection.The command line now asks "Select object to extend. ..." , click on the two horizontal linesabove, first one then the other, both will be extended until it meets the vertical line that wehad selected.At this point by clicking with the right ends and exits the command.

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 In practice at the beginning of the command autocad asks us what objects (lines or  shapes), we want to extend one or more lines, and once chosen, we choose to extend thelines on them. The condition for this is that the lines if projected going to meet the first selected. 

In 'fact, in previous image, the horizontal line at the bottom can not be extended because itwould not meet the first line we have chosen as a target.

Be careful because this is a situation that happens often, and drawing in which theneophyte Autocad drawers crashes.It's actually very easy to get out, just draw a temporary line, on which we will extend thefirst vertical line, so on this then, we can extend the horizontal line that was previously notpossible to extend.

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In doing so, however, we have extended the vertical line that maybe we wanted to remainas before ...We could then draw another piece of line, following the first, on which to extend the linedown and then delete it.We could also copy ( we'll see after the copy command ) the vertical line above itself,extend this last line on a provisional basis, as in the image above and then delete them.

 In fact, if we have two overlapping lines, and we do click on it to extend, it extends one, theother remains hidden below.  If instead of direct single-click we select through a selection window, then extend bothoverlapping lines. 

Trim

To use 'Trim' command the procedure is similar to the previous one:

Continuing from where we are with the extend command, click on the 'Trim' command ,select the vertical line on the left, right button to confirm, then click on the horizontal lineson the left of the vertical, the two lines will be cut from the first, now right-click to finish.Yet ..Press return or the right mouse button to resume the command "Trim" select now the twohorizontal lines and also the right vertical, as cutting lines (try instead to make a selectionwindow that intersects all) key right, select the four segments to be cut so going to form arectangle.

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E ven for the "Trim" then you must select the first cutting objects (lines or shapes) and thenthe lines or geometric shapes to be cut.  In this case it is obvious how these lines should already be intersected with each other because the former can cut the second. 

For both of these two commands you can shorten some steps:Once you click on control, cut or extend, after pressing the right mouse button or the enterkey, it means that all lines could be extended or cut each other, depending on the selectedcommand.

For example:

Draw three vertical lines (they can also be non-parallel) and three horizontal lines thatintersect only one of the vertical. (See picture).

Now click on the "extend"command and then the right mouse button, now click on thehorizontal lines several times, they will extend the first line on the first meet and then onthe second. In doing so pay attention to the fact that if you click on the part left of theselines by their centers do not extend.It may seem that the command does not work, but it is not.

If you were to extend a line to the left of course the opposite is true.

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Now using the "trim" in the same way that tries to go back to cut the lines that havepreviously extended, (also try, in addition to select one at a time, to make a box selectionthat intersects two or three, the latest versions of AutoCAD can be cut or extended in thisway many lines in one pass only).

As you can see in this way is like chosen to cut or to extend all the lines in a single click.

Small introduction to "zoom".

As you surely know "zoom" is the magnification and see something that is more or lessclosely.

You have, in theory, a mouse with a scroll wheel between the two buttons, well, afterdrawing something, just a line, try to rotate slowly in one direction and another with themouse wheel.You will see items you have drawn closer until it disappears from the screen or leave up toa certain point and then stop.Note also, for example, after drawing a line, the difference to use the "zoom wheel" afteryou move the pointer near one end or the other of the line.

You'll see that the design approaches and moves away relative to the position of thepointer, and then to an area of design that you have freely given with the mouse, in thiscase at one end of a line.We therefore have a dual function that allows us to approach or move away from theobjects and to move in any direction on the design, moving away from a point andreconnecting to another.

We'll see after other commands specific to the "zoom".

³Fillet´and³Chamfer´ commands . 

These two commands "Filllet" and "chamfer" , you will also find them on the "modify"tooolbar and have the following icons:

= Fillet .

= Chamfer .

Need both for joining two lines not parallel (*) or that are perpendicular, and when they donot meet each other, that when they are intersecting.Let's see how they differ:

With the command "Fillet" , we can combine the two lines forming an angle or a connectionbetween these rayed.

Design with "ortho" active two perpendicular lines that do not meet, as in the image below:

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Now click on the fillet command and observes the "command line" at the bottom.There are two things to note, first, that as I said Autocad asks us to select the first oject

"select first object, but on the second line is an important information," Radius = 0.0000"(radius = 0.0000).This means that combining the two lines will create a link with zero radius, then a corner.

Continue with the command and select one of the two lines and after clicking on the other.The two lines join at an angle, which in this case is 90 ° because the lines were alreadydrawn perpendicular to each other and you will automatically exit the command.

Now let the same thing but running a ring "beam".You can delete and redo the two initial lines, but not perpendicular, or you can continue

from where we came, is the same.

Click again on the "Fillet" and then before you select the first line is still observed on thelast line "command line", where autocad writes:

Select first object or [...](Select first object or [...])

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[See the items in brackets are the options among which is " R adius ".

Attention to the syntax of these entries, the use of capital letters is the key to press to

activate each option.

We are interested to "radius" then it goes like this:

Enter on the keyboard the letter "r" and then hit enter.

Specify fillet radius :we are asked the radius of curvature that we use and we are shown the current setting<0.0000>:

Type 50 and press enter.Now we're back to where we are asked to select the first line.Then select the two lines, which should combine to form a curve that has radius of just 50units and the command is completed.

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If you repeat the command, the radius is now set to "50", because it remain set to the lastmeasure that we used for the connection previously done, until you close the file.To set it back to "zero" or another measure, do the same procedure to that describedabove.

 If you try to repeat twice the ring on the same lines without deleting them, using for example a radius larger than the first, you'll notice that the first part of the curve fitting isdone on the screen as an independent object, an arc. This is because running a link between these two lines get longer until they meet but do not become a single object in the case of a fillet radius is formed a third part of the curve, anarc precisely the range that you set during execution command. 

(*) Regardless of the set radius, if you run a "fillet" (connection) between two parallel lines, they are connected to each other forming a semicircle. 

Now to the "chamfer" .This command is similar to the "Fillet" but instead of a curve, asmentioned above, create a chamfer between two lines are not parallel, and that they do not

meet or are crossed each other.

Delete everything and redo the two perpendicular lines as before, then take control by

clicking the icon on the modify toolbar and as usual, look at the command line.

First the program asks you to select in sequence the two lines to merge, but the middle lineis now written: Current chamfer Dist1, Dist2 , with values that should be initially "zero". If we select the two lines with these values set to zero as in the previous case, you will create a simple angle between the lines. 

Pressing the "d" on your keyboard and then "enter" at this point prompted the first valuefor the "Distance1" type 50 and press enter.Now we are asked to value the "distance2", press enter to confirm the same distance usedfor the first value.Now you can select the two lines, which join to form a rope that will distance as theassigned values.These values could have been too different from each other, forming an asymmetricchamfer.

When you repeat the command, you'll find the distance values previously set.

As for the "Fillet", the segment that is formed will not be joined into a single object with the

other lines, but we selected three items separately.

The following image show two dimensions to see how involved the values set in the"chamfer" command. 

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Zoom tools.

Until now I have only explained the operation of the mouse wheel in relation to the "zoom",because in practice is the most used, but there are many other specific commands and nowwe will see the most important and frequently used.

The zoom controls are on the "standard toolbar" at the top below the menuis this:

Draw some lines on the screen to see the operation of these commands.  

"Pan": By clicking this button, you activate the "pan", the cross-hairs turns into a handand holding the left mouse button and moving it and how if you move the drawing in anydirection, zoom factor in this case remains unchanged.To exit the command, just press "esc" key on your keyboard, or right click with your mouseand then click on "exit" in the small menu that appears.

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"Realtime Zoom : Clicking here corsore turns into a small magnifying glass, hold the leftmouse button and drag up and down you have a zoom with an effect similar to that of thewheel mouse.First "esc" to exit or right click and "exit".

 In the menu that appears when you right -click with the mouse when running these

commands, we can switch between them by clicking on its entry "pan" or "zoom". 

"Zoom Window" : this approach enables us to zoom to an area of our design establishedby a selection window.Then you click on the command and then gets a window by double clicking with the mouse,to delimit the area to zoom in, the command terminates automatically when zooming.

The zoom button on the standard toolbar, a small black freccettina in the lower right.This suggests that contains other hidden commands and you can see by clicking andholding the button sinisrtro, you'll see these other commands.

Among these the most important is:

"Zoom Extents" , select it by dragging the cursor over it and releasing the button of 

mouse.Now AutoCAD do a zoom away from the drawing, until become visible all the objectspresent in it.

 And 'good habits after you've done a drawing, run this zoom before saving, so that the re-opening is readily visible in its entirety. 

"Zoom Previous" : After making one or more times zoom controls described, by clickingon this will come back to the previous display.

 All "zoom" commands can be used at any time and in any order you want, even when

running other commands eg. while you are drawing a line, or while you are moving or copying an object. 

"Regen´ function.

Let's see "Regen" function (regenerating drawing), this command makes the Autocadregenerate the drawing to the screen.Try to draw one or more lines and then with the mouse wheel do a "zoom", as far away aspossible from the drawn lines.

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You'll see at some point, the zoom stops. To continue to zoom the picture we must regen it,by selecting in the menu bar at the top, the following entry:"View> Regen" , then we can still continue to move away from the drawing to zoom up tothe next block, where we continue to invoke again the command "Regen".

What happens then, the program reached a certain percentage of the zoom no longer ableto handle graphic design, and indeed should "optimize" to continue.This will become clear when we draw circles or arcs, in this case in fact moving away from acircle to having to use the "Regen" and then reconnecting it, you'll notice that the circle ismultifaceted.We see design as well because it has simplified the program, but only in terms of graphicson screen.Again using the command "Regen" in fact, we will show again the circle or arc, correctly.

S o when you happen to zoom a circle and see it multifaceted, you know it's for this reasonand you just have to "regenerate the drawing."   Also remember that this is only an approximation in terms of graphics on the screen, if you print it would normally appear on the paper. 

 _____________________________________________________________ 

Well at this point, with the commands that we have seen,- Line- Offset- Trim- Extend- Fillet- Chamfer,with the "ortho" and "zoom" functions, although limited, you should be able to take theirfirst steps and draw simple objects, such as the plan of a room, a table or the prospect of alibrary, with the size down.

Experiment, simply start from a horizontal and a vertical one that could be two walls of ahypothetical, then the offset will create the opposite walls at the desired distance (think of the measures that can actually have a room) and join the All with "joins" or "extend" and"size".Later, by the "offset" command, you can give depth to the outside walls and then join

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together again.Try to understand these commands and to consider them collectively as the basic tools fordrawing.The first few times you will be a little difficult, but it's only a matter of practice, takeheart that we areonly beginning!

Saving and Opening files.

Here's how to save the drawing as you did and open a new one.Open the "File" menu and click on "Save As.".

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This will open a window like the one in the picture, where you can choosethe location where to saveyour file and give it a name,you can also create new folders or delete, through the controls at the top.It works like the regular Windows file manager.

As you can see the bottom of this window is the area that says next to "file name" whereyou have to write the name for the file, replacing the voice (drawing1.dwg) that AutoCADautomatically assigns.You can avoid to write the name with its extension (.dwg), autocad will place it too andsave the file according to the type shown in the window below.

The entry below "Files of type" you can choose the type of file to be saved by choosing oneof several versions available.As a basic approach will find the version you put in the preliminary settings, at thebeginning of the course (where we talked about various types of AutoCAD files), but if necessary you can choose a temporary one, regardless of the base.

Then clicking on the "Save", the file is just stored in the chosen path, but beware, it is notclosed but remains active and you can continue to work on it.To save the changes you have made more simply click on "Save", always in the menu "File"and in this way the file, which you already have a name at the time of the first rescue, willbe updated by overwriting it on himself without creating a new one.

Do you remember when we set the auto- save every 10 minutes, beginning in the optionswindow ... well keep in mind that this does not directly update the design you're working

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but makes a copy in another folder specific and can be resumed in case of emergency, sooften you must save the drawing, by the menu "File> save ..", because if the programcrashes (I assure you it happens) you lose your job done. You can also save the file by clicking on the "standard toolbar" button on the third 

representing a floppy disk.

To close the file on which you are working by clicking on the cross "X" in the upper right( not the first higher on a red background, that closes autocad, but the second post below ).At the time of closing, if the design has not been saved after the latest changes, a windowappears where we are prompted to save the file or not.

To open a drawing you have to go on the menu "File> Open ..", or click on the "standard

toolbar" on the second button representing an open folder:

A window similar to the one for saving, where you can scroll through the folders on yourhard drive, to the location where the file to open, then we double-click it or select it andthen press "Open".

In the next window under "Files of type" you can choose one from among several types of files that AutoCAD can open and where the "dwg" as mentioned above is the standard.

The other type of files that AutoCAD can open and save is the 'dxf' which is similar to "dwg"which can be used to exchange drawings in Autocad with other programs.Then there is the format "dwt" drawing template, if that refers to a selected folder toindoor Autocad where there are files that already contain squaring and masks in varioussizes A4, A3, according to specifications "ansi", "iso" etc.. known as the "template".For the moment being occupied by only normal "dwg".

Please note that you can open multiple files at once , which similarly to the windows of "operating system ", can be reduced, enlarged or sent to an icon, can be viewed one at atime or simultaneously, side by side.I will not elaborate on what should be fairly intuitive if you have a minimum of familiaritywith Windows.Below I have put a sample image:

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Create a new design from scratch. 

To create a new design from scratch you click the menu "File> New .." (File> New ..)In the window that appears ( may be different from what appears to open and save if youhave an old version of Autocad ), click on the arrow beside the button "Open" (Open). Onthe menu that appears select " Open with no template - Metric . "This will open a new drawing window.

Part 3

OBJECT SNAP AND MODIFY TOOLS

Object Snap .

We will now see a very useful feature of Autocad: "object snap" , this utility allows us todraw accurately and faster.

Suppose you have drawn a line and now you will want to do another one that starts exactlyat one end or the middle of the line already done.

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It appears, therefore, the need to "attack" the second line to the existing first, but how dowe combine it with precision?If we go to the eye may appear the two lines are joined, but by zooming closer to the pointwhere the result is not so, even if only slightly.We must ensure however that the lines are perfectly combined in the desired location.

To do this we must serve the "Object Snap" that are nothing but a kind of magnet thatallows us to interact with various objects in the drawing of their second set of points, suchas the end or the center of an object, highlighting these issues with special symbols thatappear at the time of their intervention at the point concerned the design.The "snap" has its own special toolbar that can be made visible or invisible by clicking theright mouse button on any of the existing toolbar and selecting the "Object Snap" in themenu that appears.

Here it is:

Each key corresponds to a different function, we see the main

= Endpoint . Corresponds to the ends of lines or arcs and angles of geometric figures.When activated on the screen a yellow square on the end checked.

= Midpoint . Corresponds to the midpoint of a line, arc, or one side of a geometricfigure.

Its activation appears a yellow triangle at the point selected.

= Intersection. Corresponds to the point of intersection between two lines.Its activation appears similar to a cross "X" at the point selected.

= Center. Corresponds to the center of a circle, an arc or an ellipse.A circle to its activation appears

= Quadrant. Corresponds to the end of the circle, an ellipse or an arc, compared to the Xand Y axes UCS.

Its activation appears a small yellow diamond.

= Tangent . Corresponds to the tangent on a circle, an ellipse or an arc, compared to thepoint where you take a line.

Its activation appears a circle with a dash above.

= Node . The node corresponds to a point that can be drawn (we have not seen it yet) oreven the definition points of allowances (these are also to be seen) and the center of thetext of the same.

Its activation appears a circle with a cross in the center.

= Pependicular . Corresponds to the perpendicular to an object from the point fromwhich you take a line.

It allows us to bring a line perpendicular to another, even without going to meet her.The symbol that distinguishes it is when you turn a corner with a square inside.

= Nearest. With this command you can select any point on an object. Its activationsymbol appears like an hourglass.

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= Snap to None. Clicking on this will temporarily disable all snap, useful when workingwith 'AutoSnap active, and soon we shall see.

Well the use of object snap is very simple, and takes place within the various commands of AutoCAD.For example, after activating the command line, before selecting the first point of this, you

can click on the snap "midpoint" and then establish the first point of the line to be builtexactly on the midpoint of another, then you can still select another snap, such as

"endpoint" and then go to select the second point of the line at one end to another.

So for the other object snap according to their related functions.

You have to do some tests with the snap, then we will see one more important benefit youwill facilitate a lot of snap in their use, it 's AutoSnap.

Osnap Settings.

By clicking on the last snap of the toolbar button, opens the following window:

By checking the first check box in the upper left corner where it says "Object snap on", youenable or disable the AutoSnap.

How do you see for each item the object snap, is shown on the left the symbol that appearson the screen when it is activated and you need to precisely identify the various types.By checking the box, those that are used regularly throughout the design you choose whowe want to use automatically.Set it as shown, and then click OK.

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At this point the AutoSnap is set and active, which means that when we use any drawingtool that requires you to establish points on the screen, every time you approach the cursorto a point that Autocad will recognize as being equal to one set of snap, this willautomatically show the point indicated on the symbol.At this point you can select precisely the desired point without having to go every time tochoose needed snap on the toolbar, comfortable isn't it?

Once set, you can enable or disable the AutoSnap pressing the "F3" key on your keyboardor by clicking on the button bearing the word "OSNAP" among those present under the"Command Line".

These tools are essential to draw with precision, do some tests, drawing lines and joiningthem with the other, with both AutoSnap and singular snap at once.

W hen you select the snap individually, note that on the command line is written the newly activated, which will be valid only for next selection.  If you select the wrong snap you can choose another by clicking on it twice. (Look alwayson the command line that tells you what you choose). 

W ith the AutoS nap active can also temporarily select a 'snap' other than those set 

automatically by selecting it on the toolbar. In this case it will be active for only one selection. 

³Move´ command.

The command moves as the name suggests is to move one or more objects from one pointto another of the drawing.

It is activated by clicking on this icon which is on the "modify" toolbar.At this point the crosshair cursor changes to a selection handle and the "command line" iswritten to "select objects".You must now select one or more objects to move and you can do so by clicking on eachone individually or by selecting one or more windows, then we need to confirm your

selection by pressing Enter or the right mouse button.

Please note before pressing send, you can remove items from the selection made by holdingdown the "shift" key on the keyboard and simultaneously selecting new, individually orwith a selection window .

This is a general concept to remember, regardless of use by various commands in Autocad you select objects by clicking on it and clear it again by clicking while holding down the"shift" , or by pressing "esc" you clear all. The selected objects change their appearance becoming slightly dashed. 

Once you have selected and confirmed the items to be moved Autocad asks us to establishtwo points, clicking with the mouse:- The starting point against which to move objects.- The destination point where we're going to put things, relatively to the first pointselected.

This means that if you move such as a square, you can select as a first point of displacement, an angle (using the snap), or even a point outside the object, is the vertex of another object that a random point on ' drawing area.

I hope you understand this concept well and I get a picture to help you:

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Well, if you want to move the blue square below the red maintaining the distance ( A )between them, you can select as the first move point a corner of the green square and thesame angle as the second point of the red square.

If you want to attack the blue square below the red will be chosen as a first point one of thetwo vertices on the top of blue square and a second point one of the two vertices in thebottom of the red square.

Summary:

1.  Activating the command moves2.  Selecting objects to move3.  Confirm selection by pressing Enter or the right mouse button

4.  Select the first point of reference5.  Select the second point of destination and exit the command.

Make some tests ...

³Copy´command.

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The command "copy" at this point is very simple because it works exactly like the"move" but instead of moving the selected object makes a copy of this.The only difference is that once copied the first thing the command does not end and youcan continue to make copies of the first object until you press the Enter key to exit thecommand.This command is on the "modify" toolbar, and then allows us to copy objects within eachdrawing.Not to be confused with the commands and then "copy, cut, paste" of windows, which arealso present in Autocad, but only to another and we'll see you later.

 At this point you may want to speak again of the overlapping objects.   As seen above, with the copy command you can make multiple copies of one or moreobjects, doing what you can create copies of objects over themselves while continuing todisplay only one screen. 

Creation of overlapping lines do not give particular problems even if the design is good totry to avoid them. 

³Rotate´command.

The "rotate" command is used to rotate the selected objects according to the desiredvalue, expressed in degrees.

By clicking on the respective command " " on the modify toolbar, the program promptsyou to select the object or objects to rotate, once selected you hit return or the right mousebutton to confirm them.At this point, Autocad, similar to the move command, asks us to specify the base point,which in this case represents the axis of rotation, that is the axis against which thepreviously selected objects will be rotated.Again you can choose a fixed point in an object by use of "snap" (a corner, the end of a line,the center of a curve, etc..) Or anywhere in the drawing.Once you click and set the axis of rotation on the command line shows "Specify rotationangle" (specify angle of rotation), then you should enter the value of what we want that the

object is rotated, for example 45 degrees, you type with the keyboard, then hit Enter theobject or selected objects are rotated and the command ends automatically.

The direction of rotation, by including positive values will be of type "counterclockwise" inAutocad is set as the default so if you want to rotate "Clockwise" will be sufficient to enternegative numbers, eg. -45.You can enter rotation angles from 0 ° to 360 ° both positive and negative (of course it isuseless to rotate an object 360 degrees because it amounts to not rotate), using as manydecimal points you want eg 45.99 ° or 15.2 or 30,671, at least in this theory, then inpractice you usually use whole numbers at the corners with one decimal place, alsodepends on what you draw.

(NB in Autocad the comma separating the decimal numbers is done by inserting a dot).I repeat:

If you add numbers with decimal values must be used the dot and not commas. Ex 10.25 isok but 10,25 is not correct!

Summary:

1.  You click on the "rotatel" command .2.  You select the objects to rotate.3.  You press Enter or right mouse button to confirm the selection.4.  It establishes the pivot point on the design by clicking with the mouse.

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5.  You type on the keyboard the number of degrees you want, positive or negative.

You press Enter or right mouse button. The rotation is performed and the command iscompleted.

³Scale´command.

The Scale command serves to enlarge or reduce objects.It is also located on the Modify toolbar, and commands work similarly to the last seen.Starts the command, select the objects to scale, then press 'Enter' to confirm the selectionmade and then you have to choose again the basic point of reference, under which theobjects will be scaled.Autocad asks now the numerical value to what we want to scale the selected objects, onthe command line shows "Specify scale factor".You can enter decimal or integer values, for example if you want to enlarge twice selectedobjects will enter a value of 2, but if you want to halve the size will fit 0.5 and so on, ten

times greater in 10 and 0 , 1 will reduce to one-

tenth the size etc..Once inserted, the desired value you hit return or the right mouse button, the objects arescaled and exits the command.

Summary:

1.  You click on the "scale" .2.  You select the objects to scale.3.  You press Enter or right mouse button to confirm the selection.4.  It establishes the basic point of reference making click with the mouse.5.  You type on the keyboard the scale factor.6.  You press Enter or right mouse button, the change is executed and the command is

completed.

On this command is necessary to consider further as easy to use although it is often asource of difficulty for those who are at the beginning.One of the steps are more complicated to understand is the determination of the correct"scale factor" to use when you want to do an enlarged detail of an object.

Suppose you draw a table and want to make an enlarged detail of the edge of it's 'top',what scale value we have to apply?It must take account of the scale for which we will print our design.Normally the drawings (technical) maded with autocad will be printed to a scale factor,1:10, 1:20, 1:100, and so on according to need.In the case of a table, we're going to print design in 1:10 scale, in this case, if you want todo within the design detail, that is when you print it on a scale of 1:1 (the real) must bescaled by 10 times compared to the basic design.

But if you plan to print the table 1:20 scale must be larger than 20 times the detailcompared to the basic design, which would otherwise be 1:2 scale.

³Mirror´command.

The mirror command is very useful for creating a mirror copy of one or more objectsrelative to an axis to be determined.

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 A situation "limit" where it can be useful this command is as follows: S uppose you open an existing drawing that you have to change, while retaining a copy of the current version.  After performing some changes, instead of saving the file with another name, click " S ave" by mistake. At this point the file is saved with the new changes and the old version is lost. To retrieve just save the drawing with another name (so we will have two identical copies

of the amended design), a fact we will use several times the command "Undo" to go back with the changes made until we started to change design. 

Now just repeat a "save as" and overwrite the first source file, so we will have recovered by undoing changes to the original back, but we will also have the new file with the changesmade previously saved.