Tormach ATC - Page 29

9. MAINTENANCE & TROUBLESHOOTING
supplypressuretogetthepreloadup.Do not exceed

cylinder.
3. Notallairregulatorsarecreatedequal.Wehavefound
thatinexpensiveregulatorstendtoconstrictairow,
whichmakesforlongermake-upmesasthepower
drawbarres.Whilethisisnotaproblemforthe
powerdrawbarwhenoperatedbyhand(theuserjust
waitstheextrasecondortwoforthecylindertofully
pressurize),itcancauseproblemswhenusingtheATC,
whichonlypauses500msbetweenthedrawbarring
andthezaxismoving.Beerregulatorsdonotrestrict
theowwhileregulangpressure.
4. Colletslipismorelikelytooccurifyourspeeds,feeds,
orxturingresultinmachiningoperaonswithalot
ofhighfrequencychaer(endmill“squeal”).Wehave
seenevenlightcutsresultincolletslipiftheendmillis
squealingorchaeringexcessively.Usually,suchnoise
andvibraonshouldbeavoidedforotherreasons
(poorsurfacenish,reducedtoollife)andtweaking
thespindleRPMorincreasingthefeedratewilltune
thechaerout.
ATC Tray Chaer
Ifthe3linearbearingsthatsupportthecarouselare
notproperlyalignedwiththelinearguides,youmay
experiencechaerontoolchanges.Somemesthis
chaercanbeeliminatedwithalightapplicaonofway
oiltothelinearguides.Ifthechaerpersists,loosenthe
4M5Allenheadscrewsthatholdthelinearbearingson
tothecarouselassembly.Allowthebearingstoselfalign,
thenreghten.
Z Height Not Repeatable
IftoolchangeZheightissetincorrectlythetoolwill
notbeproperlyseatedagainstthespindlenose.This
problemmanifestsitselfinpoorrepeatabilityoftool
lengthcompensaon.Thisisacondionthatcanbehard
todiagnose,becauseasmallgapbetweenthetoolholder
shoulderandspindlenosecanbediculttosee.Ifyou
suspectthatthetoolsarenotseangproperly,backlight
thetoolholderwithaashlight–anygapwillbecome
apparent.Duringtoolchanges,thespindleshouldcome
downandmakecontactwiththeshoulderofthetool.If
thespindletravelsdowntoofarornotenough,therewill
beavisiblegapbetweenthetoolholderandthespindle
nose.AdjustmentoftoolchangeZheightisdiscussedin
secon2.2.6ofthismanual.
ItisalsopossibletheR8colletisprotrudingtoofarfrom
thespindlenose,thiscanbethecaseifthedrawbarisn’t
ghteneddownsucientlyorifthegapbetweenthe
aircylinderboltheadandthetopofthedrawbarboltis
notlargeenough.Adjusngthespringwashertensionis
coveredintheInialSetupseconneartheendofthePDB
installaondocument.Ifthegapbetweentheaircylinder
boltandthedrawbaristoolile,thiswillover-travelthe
R8colletallowingittohitintheboomofthepocketof
theTTSholders.Removewashersasrequiredtoallow
fullreleaseoftheTTSyetsllnotpushthecolletastobe
contacngtheTTSholder.
Sensors
TheATCusesthefollowingsensors:
1. TRAYIN
2. TRAYOUT
3. TRAYREFERENCE
4. (oponal)pressureswitch
TheTRAYIN/OUTsensorsarenormallyopenreed
switches.TRAYOUTisvisibleunderthebandclampatthe
endthepneumacactuator.TRAYINishiddeninarecess
inthelinearrailbehindthepneumaccylinderandisnot
visibleunlessthecylinderhasbeenremoved.Thepiston
ofthispneumacactuatorismagnec-thereedswitches
areactuatedwhenthepistoninsidethecylindercomes
within0.100”ofthesensor.
WhenMach3isstartedtheATCgoesthroughinializaon,
theTRAYINandTRAYOUTsensorsareevaluated.Ifthe
ATCsowareencountersacondionwherebothsensors
returnHIorbothreturnLO,anerrormessageisgenerated.
Otherchecksinthesowareuserthetraysensorstotry
topreventcrashes–forinstanceiftheTRAYINsensor
isacvetheATCwillstopyoufromjoggingpastthetool
changeposion(asolimitistriggered.)
Sowareversions1.1andhigherhavediagnoscLEDs
ontheATCSetupscreen.Thesecanbeusedtoverifythe
sensors.TheyarenotautomacallyrefreshedbyMach–if
thesystemchangesstateyoumustclicktheRefreshbuon
toseetheLEDschange.
Ifasensorisnotworkingasexpected,thefollowing
possiblecausesshouldbeinvesgated:
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UM10081_TTS_ATC_PCNC1100_1013A UM10081_TTS_ATC_PCNC1100_1013A