DigitalMicroForce2Manualver.1.3

PrestonCinemaSystems1659EleventhStreetSantaMonica,CA90404

fig.1.DigitalMicroForce2controldescriptions fig.2 Microforce controlwithPanArmAdapteraccessoryp/n1155forand17mmpanbars.

Set zoom limits

Set soft stop limits

Calibrate lens end stops

Motor Direction

Zoom Sensitivity adjustment knob

Camera Run Switch

Reset zoom limits

Joystick

Zoom Sensitivity display

Zoom Bargraph position indicator

Zoom marking strip

Zap Switch

Threaded well for bracket

LEMO receptacle

DigitalMicroforce2

1. Introduction.ThenewDigitalMicroforce2buildsuponthesamerobustforcesensortechnologywhichmadetheMicroForceanindustrystandard.TheDigitalMicroforce2featuresautomaticlenscalibration,electroniclimitsetting,andabrightLEDbargraphdisplayofzoomposition.Thislatestversionaddsprogrammablesoftstopsandanewspeedcontrolknobwithadigitalreadout.Theruggedhousing,machinedfromsolidaluminumalloy,protectsthecontrolfrommechanicalabuseandassuresyearsofreliableoperation.ItsergonomicdesignprovidesaroundedgripforcomfortablealldayuseandalsooffersaconvenientattachmentpointforitsmatingPanArmadapter.Thenewspeedcontrolknobisvirtuallyindestructible.Itturnswithglassysmoothnessthatreflectsonthecarefuldesignusedthroughout.

TheunitcandrivetheDM1X,DM2orDM4digitalmotors.Itspowerfuldrivecapabilityassurestroublefreeoperationwitheventhelargestzoomlenses.Motorconnectionismadeviaaseriesofmolded"Y"cables.ThesecablesareavailableforbothfilmandvideocamerasandallowtheDigitalMicroforce2toremotelycontrolthecamerarun/stoporVTRfunctionsrespectively.TheDigitalMicroforce2alsosuppliestheanalogcommandsignalforcontrollingthezoomchanneloftheFI+Zsystem,theinternalservosofvideolenses,ortheRadioMicroForcewirelessmodule.

2. PowerConnections.TheMicroForcemaybepoweredusingthefollowingtypesofcables:

a. "Y"Cables:(productseries1200)forspecificfilmandvideocameras.MicroForcepowerisdrawndirectlyfromtheaccessorysocketonthecamera.

b. VideoCablesforCanonandFujinon.Powerisdrawnfromthe12or20pinHiroseconnectoronthelens.

c. Zoomcables(4545,4445)forusewiththeFI+Zsystem.d. Auxiliarypowercables(productseries11281130)maybeusedinconjunctionwith"Y"

cablestopowerthecontroldirectlyfromabattery.3. Powerrequirements.TheMicroForceoperatesoveravoltagerangeof1130VDC(max).Idle

currentis55mAat24VDCor95mAat12VDC.Themaximumcurrentdrawnunderstalledmotorconditionsis1.2A@24V(typ.)or2.4Aat12V.Theactualcurrentrequirementisproportionaltotheoperatingtorqueandthecurrentlimitsetonthecircuitboard.

4. OperatingProcedures.CAUTION.Themotorwillstartrotationassoonaspowerisappliedtothe

unit.Makesureyourhandisclearofthemovinggear!a. AttachtheDM1,DM1X,DM2,orDM4Xmotortothematteboxsupportrodsusinga

19mmmotorswingarm(productseries4300)withastepdownbushingfor15mmor.625"rodsifrequired.Makecertainthattherodsaresecuredagainstrotation.UsetheArriorPanavisionBridge(4304,4311)toprevent15mmor.625"rodsfromtwisting.

b. Positionthemotorsothatitsgearteethareengagedwiththecorrespondingteethonthezoomringofthelens.Auxiliarygears(productseries4231,4240,4241)areavailabletoenablethemotortodriveeitherPanavision48DPgearingor.50m/.60mgearsforCanonandFujinonvideolenses.

c. Checkthatthegearsaremeshedjusttightlyenoughtoeliminateanyplaybutnotsotightlyastocausethegearstojam.

d. ConnecttheMicroforce2toitspowersource.ThegreenLEDpowerindicatorshouldbeilluminated.

e. Themotorwillcalibratebyfindingthemechanicalendstopsofthelens.Duringthisphasethemotorcurrentislimitedtoalowvaluesoasnottoapplyexcessiveforcetothelens.Thebargraphindicationwillremaindarkuntilthisoperationiscompleted.

f. Afterfindingtheendstopsofthelens,themotorstopsandthebargraphindicatorwilllightindicatingthepositionofthezoomsetting.

g. Thezoomspeedanddirectioncannowbecontrolledbyapplyingpressureontheredjoystickbutton.

5. ControlFunctions.

a. TheMaximumspeed/ZoomSensitivitycontrolislocatedatthebottomofthecontrol.Theadjustmentrangeis8turnsoftheZoomSensitivityknobwithacorrespondingrangeofthedigitaldisplayfrom099.

b. Thezoomspeedanddirectioniscontrolledbyapplyingfingerpressuretotheredjoystickknobeithertowardsthetoporbottomofthecontrol.

b. TheDirectionswitchreversesthemotorrotation.c. TheCameraRunswitchhas3positions;centerOff,ToggleOn(awayfromthejoystick)and

MomentaryOntowardsthejoystick).TheToggleOnpositionisforcamerasrequiringacontinuoussignaltorun(i.e.Arri12V,Panavision,Aaton),whiletheMomentaryOnisforcamerasrequiringashortpulsetochangefromruntostop(i.e.Arri24V,Moviecam,Sony,REDdigital).

d. TheZapswitchsetsthecontroltomaximumspeed.Pressingthismomentaryswitchallowsthelenstobereturnedquicklytopositiondespitealowmaximumspeedsetting.

e. TheSetbuttonisusedtosetlimitstothezoomrange.Tosetlimits,positionthelenstothefirstlimitusingthejoystick.WhiledepressingtheSetbutton,pressonthejoysticktomovethelenstotheotherdesiredlimit.Releasethebutton.Nowthelenswillstopattheselimits.Usethebargraphdisplaytofeatherthemoveasthelimitisapproached.TheResetbuttonerasesthelimits.

f. TheLensCalbuttoninitiatesthecalibrationprocedure.g. Thesoftstopfunctionautomaticallyslowsthezoommotorasitapproachestheendstops.

ThepointwheredecelerationbeginsisprogrammedbypressingtheSoftStopswitch(fig.3below)andsettingthedecelerationdistancebypressingthejoystickupordown.Thelitareaofthebargraphshowstherelativedistanceoverwhichdecelerationtakesplace.

ReleasetheSoftStopswitchtoresumenormalbargraphdisplayoperation.

6.TroubleshootingGuide

Problem Action a Powerlightisoff. Checkpowersource.IsbatteryOK?Ispowerpresentataccessory

socket?Checkunitwithauxiliarypowercable.Thethermalfusemayhaveopened.Removepowerfor1minute.

b Motorstopsduringcalibration

Isthegearmeshtootight?Doesthelensbind?Checkthatthemotorbracketdoesn'tmoveandthatpostthroughthemotoristight.Isthemotorjammed?Checkoperationwithmotordecoupledfromlensgear.Presstheresetbuttonandrecalibratethelens.

c Powerlightisonbutthezoommotordoesn'tmove.

CheckthesettingoftheSpeedControl.Wasthesetbuttonpressedinadvertentlywithoutmovingthezoomposition?Thiswillresultinhavingthetwolimitsnexttooneanotherthespanwillbezeroandthelenswon'tmove!Presstheresetbuttontoclearanylimitstops.Checkthatalltheconnectorsarefirmlyseated

d ZoomMotorcreepswithnopressureappliedtothejoystick

SeeserviceguideSection7.iv.3.

Fig.3Settingthesoftstopdistance

1

7. TechnicalInformationandServiceGuide

i. LEMO14pinout.TypeEGG2B3141. Power2. Gnd3. MomentaryRun(inverse)4. Run5. Run(inverse)6. Vrefinput7. ZoomCommandoutput8. MotorPlugged(inverse)9. EncoderChannelB10. EncoderChannelA11. EncoderGND12. +5V13. MotorDriveA14. MotorDriveB

ii. DM1,DM2LEMOpinoutsLEMOtypeEGG1B307(receptacle)

1. MotorDriveB2. MotorDriveA3. EncoderChannelA4. +5VDC5. GND6. EncoderChannelB7. MotorPlugged(inverse)

iii. 16pinBergHousing1. +Battery2. Battery3. Switchcommon(momentary)4. +joystick5. Joystickoutput6. joystick7. VideoRefinput8. ZoomCommandoutput9. MotorPlugged10. EncoderChannelB11. EncoderChannelA12. GND13. n/c14. +5V15. MotorDriveA16. MotorDriveB

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76

5

4

2

3

Fig.3Circuitboardshowingtestpointsandpotentiometerlocations.

iv.TestingandAdjustmentprocedures.CAUTION:Thesetestsinvolvemeasuringvoltagesonthepinsofintegratedcircuitsand/ortestpointswithveryfinespacing.AccidentallyshortingadjacentpinsMAYDESTROYthedevices.Onlyaskilledtechnicianshouldundertakethesetests.Refertofig.3fortestpointandpotentiometerlocations.

1. Powersupplyoperation.ThedigitalMicroForcehasfourswitchingpowersupplies;controlled

byIC'sU12,U13,U14andU20.AllfoursuppliesareactivewhentheMicroForceisdrivingadigitalmotor.Theygenerate+23.5V,+9V,+5Vand+3.3V/3.3Vrespectively.U12actsasavoltageboosterinthatitsoutputvoltageis23.5Vforinputvoltageslessthan22V,anditsoutputvoltagetrackstheinputvoltageforvoltagesgreaterthan22V.WhenthecontrolisusedintheAnalogmodeforgeneratingaZoomcommandsignaltocontroltheFI+Zzoomchanneloroperatetheinternalservoofavideolens,the+5Vand+23.5Vsuppliesareturnedofftominimizecurrentconsumption.

2. Totestthepowersupplies,powertheunitwitha12V2Asource.PTC1isa1.6Athermalfusewhichprotectstheunitfromcatastrophicdamage.ItislocatednexttotestpointTP2.Ifitishottothetouchthereisashortcircuitordamagedcomponent.Thisfaultmustberemediedbeforeproceedingfurther.ThetablebelowliststhevoltagesgeneratedonthecircuitboardbytheassociatedICs.Allvoltagesaremeasuredrelativetothegroundpin(seefigure3).ICsortestpointslocatedonthebottomsideofthecircuitboardaredesignatedwithanasterisk*.

J1VR2

VR1VR3VR4TP3TP4

2 4 6 8

7531

10 12

9 11

14 16

13 15

GroundPin(underwires)

VoltageswhichareoutsideofthestatedtolerancemayindicateeitheradefectiveIC,afaultypassivecomponent(capacitor,inductor,ordiode),oranimproperload.ItisstronglythatthefactoryservicedepartmentoradesignatedPCSservicerepresentativeperformboardlevelrepairs.

3. NullAdjustments.Thefollowingproceduresareusedtoeliminatemotorcreepingwhen

operatingpressureisnotappliedtothejoystick.Theprocedurehasthreeparts:nulladjustmentforjoystickoffset,digitalmotoroffset,andanalogmodeoffset.Thenulladjustmentforthejoystickmustalwaysbeperformedfirst.Adigitalvoltmeterwith0.1mVresolutionisrequired.Usesmall"grabberhooks"tomakecontactwiththetestpins.

a. Removethe4screwssecuringthecoveroftheunit.Applypowerusingeithera"Y"

cableforconnectiontoadigitalmotor,acableforconnectiontoaFIZsystem,oracableforavideolens.

b. Securetheunitatatypicaloperatingangle(30to45typical).c. Turnthemaximumspeedcontrolclockwiseto"99".d. Withnothingcontactingtheredjoystickknob,measurethevoltagebetweentestpoints

3and4.AdjustVR2tomakethereadinglessthan0.20mV.Thiscompletesthejoystickoffsetadjustment.

e. Checkforjoystickhysteresisbymomentarilyapplyingpressuretotheredknobinonedirectionandthenreleasing.Afterallowing1020sforthemeterreadingtostabilize,thereadingshouldreturntolessthan1mV.Repeatthisbutwithpressureappliedintheoppositedirection.Againconfirmthatthereadingislessthan1mV.Excessivehysterisiscanbecausedbythejoystickreceivingalargemechanicalshock.

f. Thenextstepsisforadjustingthedigitalmotoroffset.Usea"Y"motorcabletopowerthecontrol,butdontconnectamotor.

g. Placethecontrolonaflatsurface.Makesurenothingiscontactingtheredjoystickknob.PressandholdsimultaneouslybuttonsSetandResetfor35secondsandthenrelease.Thiswillautomaticallydeterminethevalueforthedigitalmotoroffsetandstoreitintomemory.

h. Thelaststepisforadjustmentoftheanalogmodeoffset.ConnectthecontroltoaVideolensortheFIZunitusinganappropriatecable.Besurethatthesensitivitycontrolissettominimum(0")asbefore.Findpins7and8ofconnectorJ1onthecircuitboard(thebrownandbrown/whitestripedwires).Seefig.3.

Usefineprobetipsonthevoltmeterprobestomeasurethevoltagedifferencebetweenpins7and8.AdjustVR3untilthevoltagedifferenceislessthan0.10mV.Thiscompletestheanalogmodeoffsetadjustment.

i. VR4isusedtonulloutjoystickasymmetry.Itssettingshouldnotbealteredunlessthejoystickisreplaced.

Voltage Designator IC P/N Test Point 23.5 0.5 U12 LT1370HV C41(+) 5.0 0.2 U14* LM2675-5 C36(+)* 9.00.3 U13 LM2675-5 C51(+) +3.30.1 U8* LTC1877 C69/R45* -30.5 U8* LTC1877 C71(+)*

v.CurrentLimitadjustment.ThecurrentlimitadjustmentpotVR1determinesthemaximummotortorquebothduringcalibrationandnormaloperation.Theoperatingtorqueisapproximately40%higherthanthecalibrationtorque.Thestallcurrentthroughthemotorisfactorysetto0.90A.TurningVR1anticlockwiseincreasesthemaximummotortorque;eachfullturnofVR1roughlycorrespondstoa10%change.

fig.4DM1X,DM2,andDM4digitalmotorsfig.5MicroForcewithFIZHandUnit

DM1X DM2 DM4

DigitalMicroForceControlsandAccessoryList

ProductNumber Description1210 DigitalMicroForce2Control1128 AuxiliaryPowerCable12V(4pinXLR)1129 AuxiliaryPowerCable24V(3pinXLRPVpolarity)1130 AuxiliaryPowerCable24V(3pinXLRArripolarity)1220 Ycablefor12VArriCameras1221 Ycablefor24VArriCameras1222 YcableforPanavisionCameras1225 YcableforAatonCameras1227 YcableforAntonBauerPowertap1234 ExtensionCable25'1234V ExtensionCable25'forvideolensonly1236 CanonVideoYcable8pinTajimiAntonBauerpowertap1237 FujinonVideoYcable8pinTajimiAntonBauerpowertap1238 CanonVideoCable20pinHirose1240 YCableforSonyHD/PanasonicHD1241 CanonVideoCable12pinHirose1258 FujinonVideoCable12pinHirose4201 DM2DigitalMotor4205 DM1XDigitalMotor4206 DM4DigitalMotor 4231 48pitchzoomgearforPanavisionlenses4240 5.0mgearforCanonlenses4241 .60mgearforFujinonlenses4301 Arri19mmSwingArm4333 Moviecam/ArriSwingArm4320 StepDownBushing19mm/15mmArri4321 StepDownBushing19mm/.625"Panavision1155 ArticulatingPanArmBracketforDigitalMicroForceandVF2