b-axis and c-axis intersection - alignment - umc-750 - ad0308 · adjust the (8) set screws [4]...

LAST UPDATED: 12/03/2018

B-Axis and C-Axis Intersection - Alignment - UMC-750

AD0308

Applies to machines built from June 2012

Introduction

This procedure shows you how to measure andalign the intersection of the B and C axes. Beforeattempting this procedure verify that the machineis level per UMC-750 LEVELING.

You will need to align the B and C axes after youeither:

• REPLACE THE B AND C AXES• or complete a UMC INSPECTION report

and find an issue

The 5‑Axis Rotary Center Distance defines thedifference between the rotary centers of rotation:C-Axis Machine Rotory Zero Point (MRZP) and theB-Axis MRZP in the X Axis.

It is possible there is no difference between theC-Axis and the B-Axis MRZP.

• Classic Haas Control (CHC): Parameter1314 - Rotary Axes Center Deviation in X

• Next Generation Control (NGC): Setting254 - 5 Axis Rotary Center Distance

You will need the following tools:

• T-2195A UMC Aligment Bar Adapter• T-2113 Alignment bar• Heat gun and heat resistant gloves

B-Axis and C-Axis Intersection - Alignment - UMC-750 - AD0308

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http://www.haascnc.com/content/haascnc/en/service/troubleshooting-and-how-to/how-to/umc-750-leveling.html

http://www.haascnc.com/content/haascnc/en/service/troubleshooting-and-how-to/how-to/b-axis-and-c-axis-assembly---replacement---umc-750.html

http://www.haascnc.com/content/haascnc/en/service/troubleshooting-and-how-to/downloadable-tools/umc-750-inspection-report.html

http://www.haascnc.com/content/haascnc/en.html

B Axis to XYZ Axes Alignment


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1Remove the A-frame trunnion support:

Remove the the bolts [1] that secure the A-frametrunnion support [2] to the base and take out theshims between A-frame support and the base.

Rotate the A-frame support [2] counter-clockwiseto clear the edge of the base [3].

Pull the A-frame support off the bearings.

Note: The A-frame support might vacuum lockon the bearings. Use the zip-tie to pry the seal [4]open.

Caution: To lift the trunnion support, get theaid of another person. The support weighs 85 lbs(39 kg).

2Measure the B- axis of rotation parallelism tothe Y-Z plane:

For a machine with a Classic Haas Control,change Parameter 151:20 (B axis CHK TRAVL LIM)to 0.

For a machine with a Next Generation Control,change Parameter 6.021 (B axis CHK TRAVL LIM)to FALSE.

Measure the parallelism of the platter to the Y-Zplane with the B axis at 90° and then the B axis at-90° as shown in the picture.

Compare the results at B 90° and B-90°. Theresults should be:

• Symmetric against the Y-Z plane,positive or negative direction.

• Less than 0.0010"/20"

If the results are symmetric against Y-Z plane, andare less than 0.0010"/20 inches: Go to Step 5.

If the results are symmetric against Y-Z plane, butare more than 0.0010"/20 inches: Go to Step 4.

Warning: If the results [3] are not symmetricagainst the Y-Z plane, the B axis rotary needs tobe aligned: Go to Step 3.


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3Align the B axis of rotation parallel to the Y-Zplane:

Loosen the (6) bolts [1] that secure the B axisrotary to the base casting.

Note: Keep the bolts sufficiently snug tocontrol the adjustments.

Adjust the front and rear setscrews [2] until themeasurments taken in Step 2 are symmetricagainst the Y-Z plane.

Torque the (6) bolts [1]. Refer to HAAS FASTENERTORQUE SPECIFICATION.

Verify the measurements in Step 2 after the boltshave been torqued.

4Align the C Axis of rotation perpendicular to theB Axis of rotation:

Remove the bottom C-Axis access cover.

Loosen the (12) bolts [1] that hold the C Axis bodyto the B Axis platter face.

Reach the bottom (4) bolts through the C Axisaccess port.

If the B Axis is symmetric in the positive direction[4], install horseshoe shims [2] of appropriate sizebehind the top (2) bolts.

If the B Axis is symmetric in the negative direction[5], install horseshoe shims [2] of appropriate sizebehind the bottom (2) bolts.

Torque the (12) bolts to 80 Ft-lbs (108 Nm).

Cut the excessive shim material off.

Verify the measurements in Step 2 after bolts aretorqued.


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http://www.haascnc.com/content/haascnc/en/service/troubleshooting-and-how-to/reference-documents/haas-fastener-torque-specifications1.html



5Align the trunnion support shaft co-axial withthe B Axis of rotation:

Setup (2) indicators on the outer race of thetrunnion support bearing [2] as shown in thepicture.

Mark the spot on the outer race where one of theindicator needles is contacting the surface.

After moving the B Axis to 90° or -90° you willalign the marked spot with the needle again toexclude the bearing runout error from themeasurements.

Take the readings when B is at 90° and B at -90°.Compare the readings.

Caution: The B axis brake needs to beclamped when taking the readings.

The deviation between the results when B is at90° and at -90° needs to be less than 0.001" oneach indicator.

Note: The indicator on the side of the bearingwill measure top to bottom alignment and theindicator on the top of the bearing will measureside to side alignment.

Loosen the (6) bolts [3] on the C Axis bodysupport. Keep the bolts sufficiently snug tocontrol adjustment.

Adjust the (8) set screws [4] until deviationbetween B at 90° and B at -90° is within 0.001".

Torque the (6) bolts [2] on the C Axis bodysupport to 80 Ft-lbs (108 Nm).

Verify the alignment after the bolts have beentorqued.


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6Install and shim the A-frame trunnion support:

Move the B Axis to 90°.

Setup an indicator [1] against a machined surfaceof the C Axis body. Set the indicator to 0.

Use plastic zip ties [2] to pry the seal open whileinstalling the A-frame support. This lets unwantedair and grease out of the assembly.

Install the A-frame trunnion support [3] over thebearings.

Remove the cable ties.

Turn the trunnion support clockwise until it isvertical.

Note: The weight of the A-frame support willcause the trunnion to sag. The amount of sag ismeasured with the indicator that was previouslysetup on the side of the C Axis body.

Adjust the shims between the A-frame supportand the base casting to remove the sag untilindicator reads 0 again.

When the indicator reading is 0, torque the (4)bolts. Refer to HAAS FASTENER TORQUESPECIFICATION.

Verify the reading after bolts are torqued. Adjustthe shims again if necessary until the indicatorreads 0.

Caution: Use equal amount of shims on eachside of the A-frame support. Unequal shims willcause the A-frame support to pull the trunnion tothe side.

Verify the B Axis of rotation alignment to the Y-Zplane (Step 2). Loosen the bolts and tap the A-frame support side to side if necessary to correctthe B axis to Y-Z plane alignment.


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7Set the tool change offsets:

For Classic Haas Controls, change Parameter 213.

For Next Generation Controls, go to:Settings>Rotary Tab>Highlight the rotary andpress [INSERT], or change Parameter 6.078 (BTOOL CHANGE OFFSET) to set the trunnion (BAxis) parallel to the X Axis (NTE 0.001"/10"; NTE0.0020" overall).

For Classic Haas Controls change Parameter 523.

For Next Generation Control go to:Settings>Rotary Tab> Highlight the rotary andpress [INSERT], or change Parameter 7.078 (CTOOL CHANGE OFFSET) to set the table T-slot (CAxis) parallel to the X Axis (NTE 0.001/10"; NTE0.0020" overall).

Install the C Axis cover.


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8Align the X-Y plane perpendicular to the C Axis ofrotation.

Make sure that B axis is at 0°.

Jog the C Axis to 90°.

With the Y Axis at -10." align the indicator overthe center of the platter.

Jog the X Axis to move the indicator [1] over thesecond rib of the platter

Indicate the platter surface along the Y Axis.

Record the direction and the magnitude of theerror.


Indicate the platter surface along the Y Axis.

Record the direction and the magnitude of theerror.

Average the error measured while C is at 90° andat 270° paying close attention to the +/- signs.

Note: This will exclude C Axis platter facerunout error from the measurements.

Adjust the shims between X Axis trucks and thesaddle until average error is within 0.0005" end toend.

Caution: Shim either two front trucks or tworear trucks with the equal shim.

Note: Shim one truck at the time to maintainthe X to Y squareness.

Verify the measurements after all bolts aretorqued.

Verify the X to Y alignment in Step 2.


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9Align the B-Axis brake disk.

Note: Do not do this step if you are workingon a SS machine.

Operate this code in MDI mode to unclamp thebrake:

M11;

Loosen all of the brake disc bolts [1] and torquethem to 5 Ft-lbs (7 Nm).

Operate this code in MDI mode to clamp thebrake:

M10;

Wait 10 seconds.

Torque the bolts. Refer to HAAS FASTENERTORQUE SPECIFICATIONS.


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B Axis to C Axis Intersection Tool Setup


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1Install the B Axis and C Axis intersection tool:


Push [EMERGENCY STOP].

Clean the table.

Guide the shaft of the adapter [1] while youslowly lower it into the center bore.

Attach the adapter to the table with (2) screws [4]and (2) T-nuts.

Attach the alignment bar [2] to the adapter with(3) screws [3].

Snug the (3) screws to allow for adjustments inthe next step.

2Align the B/C intersection tool with the C Axis:

Put an indicator on the front side of thealignment bar near the base.

Release the [EMERGENCY STOP]. Push [RESET] toclear any alarms.

Jog across the tool in the X Axis to find the highspot.

Set the indicator to 0.

Jog the C Axis 360°.

Lightly tap the base with a rubber mallet to adjustthe radial error on the alignment bar.

Note: Adjust the alignment bar to half of themeasured error, because you are measuring thediameter error.


When correctly adjusted the radial error is lessthan 0.0002" (0.005 mm).


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3Check the B/C intersection:

Center the indicator [1] on the front side of thealignment bar near the top of the cylinder.

Jog across the tool in the X Axis to find the highspot.

Zero the indicator.


Turn the (3) screws [2] on the alignment bar toadjust the runout.


When correctly adjusted the radial error is lessthan 0.0002" (0.005 mm).

Repeat Step 2 and verify the alignment did notchange.


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B Axis to C Axis Intersection Adjustment


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1Set Parameter 151:20 (B-Axis CK Travel Limit)to 0.

Change CHC Parameter 1314 (ROTARY AXISCENTER DEVIATION IN X) or NGC Setting 254(5-Axis Rotary Center Distance) to 0.

Push [ZERO RETURN]. Then push [ALL].

Jog the B Axis to -90°.

Note: The rotary positions are for referenceonly.

Put an indicator [1] on top of the alignment bar.

Jog in the Y Axis to find the high point.


Jog across the alignment bar in the X Axis [2].

Jog the B Axis to adjust the alignment bar parallelto the X plane.


Jog the Y Axis to 0.

Caution: Make sure the indicator assembly isclear of the B Axis movement.

Caution: Do not move the Z Axis.


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2Jog the B Axis to +90°.

Caution: Make sure the indicator assembly isclear of the B Axis movement.

Jog the Y Axis [1] to find the high point on thealignment bar.

Note: Do not set the indicator to 0.

Jog across the alignment bar in the X Axis.

Jog the B Axis to adjust the alignment bar parallel[2] to the X plane.

When the alignment bar is parallel to the X plane,the indicator reading is the change needed in theZ Axis (∆Z=indicator reading).

Record the value shown on the indicator. In thisexample the indicator now shows 0.0015". ∆Z is0.0015".

3Do these calculations to get the value for CHC Parameter 1314 or NGC Setting 254. (In this example thedifference in readings for the B-C intersection (∆Z) is 0.0015".):

• ∆Z / 2 x 10,000 = CHC Parameter 1314 / NGC Setting 254• 0.0015 / 2 = 0.00075• Round down to 4 decimal places: 0.00075 = 0.0007 (NGC Setting 254)• 0.0007 x 10,000 = 7 (CHC Parameter 1314)

Set Parameter CHC Parameter 1314 (Rotary Axes Center Deviation in X) or NGC Setting 254 (5-AxisRotary Center Distance), to the calculated value.

In this example, set parameter CHC Parameter 1314 to 7 or NGC Setting 254 to 0.0007.

Cycle the power to save CHC Parameter 1314 or NGC Setting 254.

Repeat Steps 1-3 to verify that the value for ∆Z is less than 0.0002" (0.005 mm).

4Jog the B Axis to the home position.

Set parameter 151:20 (B-Axis CK Travel Limit) to 1.

Make sure the MRZP offsets are correct.

Calibrate WIPS per WIRELESS INTUITIVE PROBE SYSTEM (WIPS) - CALIBRATION.

Complete an inspection report. Refer to UMC-750 INSPECTION REPORT.


of 15 pages

http://www.haascnc.com/content/haascnc/en/service/troubleshooting-and-how-to/how-to/next-generation-control--wips-complete-probe-calibration.html

http://www.haascnc.com/content/haascnc/en/service/troubleshooting-and-how-to/downloadable-tools/umc-750-inspection-report.html


b-axis and c-axis intersection - alignment - umc-750 - ad0308 · adjust the (8) set screws [4]...

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