60073 V0113

User Guide

Cautionary and Warning Statements• Thiskitisdesignedandintendedforeducationalpurposesonly.• Useonlyunderthedirectsupervisionofanadultwhohasreadand

understoodtheinstructionsprovidedinthisuserguide.• Readwarningsonpackagingandinmanualcarefully.• Alwaysexercisecautionwhenusingsharptools.

B-BotBiped Bot

2 B-Bot Biped Bot User Guide 60073 V0113

Principles at WorkHydraulicsAhydraulicsystemisonethatusesfluidasaforce.Theprinciplebehindahydraulicsystemissimple:Forceappliedatonepointistransmittedtoanotherpointusingafluid.

Pushingononeendofasyringefilledwithwater(ahydraulicsystem)createsanequalandoppositereactionontheothersyringe.OntheB-Bot,asyringeisconnectedbyatubefilledwithwatertoamechanicalpartoftherobot.Forceiswhatcausestheparttomove.

Linear to Rotational MotionTheB-Botisanexampleofreciprocallinearmotionbeingconvertedintorotarymotion.Thesyringebeingpulledbackandforth–thereciprocallinearmotion–isconvertedintorotarymotion–thegearsandhubsmovingthelegs–thankstotwoone-waybearingsandarack-and-piniongeartrain.

Thegeartrainfeaturesatopandbottomrackontheaxlewiththeone-waybearings,sothelinearmotionmovestheB-Botforwardnomatterwhichdirectionthesyringeplungergoes.

Force Force

One-Way Bearing Operation

One-Way Bearing Operation in B-Bot

Engaged Position

(axle turns with gear)

Disengaged Position (axle does not turn

with gear)

Axle rotates due to rotation of the far side gear

Axle rotates due to rotation of the near side gear

GearBearing rollerOne-way bearingAxleGear rack

Far side gearFar side bearing

Near side bearingNear side gear

B-Bot Biped Bot User Guide 60073 V0113 3

Materials Included• Bagoflaser-cutparts • 4–1"screws• 12ccand6ccsyringe • 2–1/2"screws• Tubing • 7–3/8"screws• Hubandbushingset • 2bushings• Axle • 2–#6flangedspacers• 2one-waybearings • 4–#2flangedspacers• 4spacers • Pieceofthread

Items Required (not included)• CAorwhiteglue(suchasHDBondII)• SmallPhillipsscrewdriver• Fileoremerysandpaper/cloth• Wirecutters• Smallpliers(optional)

Building the B-Bot1. Openthebagoflaser-cutparts.Popoutanyinteriorpiecesthat

needremoved.2. LayParts1and2flatwiththenumbersidefacingup.GluetheParts

3intothecenterslotsof1and2asshown.3. PlaceaPart4ontopofthe3soneachside.The“knob”shouldpoint

towardtheman’sback.Letdry.

Steps 2-3

1

4

2

3

4

3

4 B-Bot Biped Bot User Guide 60073 V0113

4. LayParts6flatwiththenumbersidefacingup.GlueaPart5lengthwiseintoeachPart6inthetwosmallslots.

5. LayParts7flatwiththenumbersidefacingup.GluetheslottedendofeachPart6intoa7.Makingsurethesestaystraight,letdry.Thesearethelegs.

6. Usingwirecutters,trimofftwoedgesofthe6CCsyringeplungerasshown.

7. PlacethesyringeplungerintotheslotsofthePart9withthetwocirclesonit(theyshouldfaceawayfromtheplunger).Makesurethetrimmededgesoftheplungerarefacingupanddown,notsidetoside.

8. PlacePart10overtheplunger.9. PlacePart8ontopsothetwosawedgesofParts8and9faceeach

other.Inserttwo3/8"screwsfromthesidewiththetwocircles.Thisisthegeartrainassembly.

Step 6

Steps 4-5

66

55

77

B-Bot Biped Bot User Guide 60073 V0113 5

10.Usingafileorsandpaper,fileoffanyroughedgesontheendsoftheaxle.Placeaone-waybearingontheaxleandnoticehowitwillspininonlyonedirectionandthatatinyarrowonthesideindicatesthis.Removethebearing.

11. LaythetwoPart11sonaflatsurfaceandcenterthebearingsinsidethesesobothbearingswillspininthesamedirection.

12.PlaceonePart11overaPart12.PickthisupandplacetheotherPart11ontheothersidesoPart12issandwichedbetweentheothertwopieces.Makesuretokeepthebearingsspinninginthesamedirection.

13. Insertanaxlethroughthebearingsandcenterit.PlaceaPart12onbothsidesofthebearingassembly.

3/8" screws

Steps 7-9Completed assembly

10

9

8

Steps 10-1312

1112

11

12

One-way bearings

Completed assembly

6 B-Bot Biped Bot User Guide 60073 V0113

14. InserttwobushingsintheholesatthebottomofParts1and2.PlacethebearingassemblybetweenParts1and2,insertingtheaxleendsintheholeswiththebushings.

15.PlacetwoofthespacersbetweenParts1and2alignedwiththetwoholesinthetorso.Insert1"screwsfromthesideofPart2tosecure. Tip: Itmaybeeasiertoholdthespacerswiththeplierstodothis.

16.Notethateachhubhasthreeholes.Placeahuboneachsideoftheaxlesothatonesidehasaholeatthetopandtheotherhasaholeatthebottom(seephotoabove).Ifthehubsfeellooseontheaxle,removethehubsandinsertasmallpieceofthreadthroughthecenterholeonthehubandreattach.

17. Insertthegeartrainassembly,gearrackfirst,downintotheman’storsoasshown.Makesureeachgearrackengagesonegear(Part11).MakesurethesyringelipsareinsertedintotheslotsonParts1and2.

18.Placetheothertwospacersbetweentheholesintheheadandsecurethemwiththe1"screwsasshown.Reachinandmovethegeartrainupanddown–thehubsshouldspinforward.

Steps 14-16Completed assembly

1" screw

Hub

Spacers

Bushing

Bushing

Hub

Bearing assembly

Top hole

Bottom hole

1" screw

B-Bot Biped Bot User Guide 60073 V0113 7

Steps 17-2119. Throughthe

middlehole,attachalegtoeachhubswith3/8"screwssothatyouarescrewingintothetopandbottomholespointedoutearlier.Afterdoingthis,makesuretheholesstillpointinoppositedirections.Iftheyaren’t,usetheplierstotwisttheminplace.

20.PlaceParts13(thearms)undertheParts4oneachsideofthetorso.Using1/2"screws,securethesethroughtheholesatthetopofthelegs(threepartswillbeheldtogetheroneachside).Besureitssnugbutthearmscanmove.

21.With3/8"screws,fasteneachPart13armtotheholeonthePart4knobs.

1" screws

3/8" screw & #2 flanged

spacer

Note: Screws and spacers shown on

the left are repeated on the right

3/8" screw & #2 flanged

spacer

1/2" screw & #6 flanged

spacer

Gear train assembly

13

13

Spacers

8 B-Bot Biped Bot User Guide 60073 V0113

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Powering the B-Bot1. Makesurethe6ccsyringeonthe

B-Botiscompletelydepressed.2. Withthe12ccsyringedepressed,

insertitstipintothecupofwaterandpullbacktheplungertofillthesyringe.Attachthetubingtotheendanddepressthesyringetofillthetubingwithwater.

3. AttachtheotherendofthetubingtothesyringeontheB-Bot.Removethe12ccsyringeandrefillittothe10ccmark.Attachitagaintothetubing.

4. TooperatetheB-Bot,setitonaflatsurfacesuchasthefloor,counter,ortabletop.Depressthe12ccsyringeplungerandthenpullitbackout–continuetodothistomaketheB-Botmoveforward.

Step 2

Completed B-Bot