Leadshine Technology ME542 User manual

User sManual
For
ME542
Economical Microstepping Driver
Version 1.0
2006 All RightsReserved
Attention: Please read thismanualcarefullybefore using the driver!
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Contents
I
TableofContents
1. Introduction, Featuresand Applications································································· 1
Introduction ······································································································ 1
Features ············································································································ 1
Applications······································································································ 1
2. Specificationsand Operating Environment ···························································· 1
ElectricalSpecifications ···················································································· 1
Operating Environmentand otherSpecifications ··············································· 2
MechanicalSpecifications················································································· 2
3. PinAssignmentand Description············································································ 3
ConnectorP1Configurations············································································· 3
ConnectorP2Configurations············································································· 4
4. ControlSignalConnector(P1)Interface································································ 4
5. Connecting the Motor ··························································································· 5
Connectionsto 4-lead Motors············································································ 5
Connectionsto 6-lead Motors············································································ 5
Half Coil Configurations············································································ 5
Full Coil Configurations ············································································ 6
Connectionsto 8-lead Motors············································································ 6
SeriesConnections···························································································· 6
ParallelConnections·························································································· 7
6. PowerSupplySelection ························································································ 7
Regulated orUnregulated PowerSupply ··························································· 7
Multiple Drivers································································································ 7
Selecting SupplyVoltage··················································································· 8
7. Selecting Microstep Resolution and DriverOutputCurrent···································· 8
Microstep Resolution Selection ········································································· 8
CurrentSettings ································································································ 9
Dynamic CurrentSetting ··········································································· 9
Standstill CurrentSetting··········································································· 9
8. Wiring Notes······································································································· 10
Contents
II
9. TypicalConnection ····························································································· 10
10. SequenceChart ofControlSignals····························································· 11
11. Protection Functions·························································································· 11
Over-voltage protection··················································································· 11
Coil-ground Short Circuit Protection ······························································· 11
12. FrequentlyAsked Questions·············································································· 12
ProblemSymptomsand Possible Causes ························································· 12
APPENDIX ············································································································ 13
Twelve Month Limited Warranty····································································· 13
Exclusions ······································································································ 13
Obtaining WarrantyService············································································· 13
WarrantyLimitations······················································································· 13
Shipping Failed Product ·················································································· 13
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ME542EconomicalMicrosteppingDriverManualV1.0
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1. Introduction, Features and Applications
Introduction
TheME542 isaneconomicalmicrosteppingdriverbasedonpatentedtechnologyofLeadshine.It
issuitablefordriving2-phase and4-phase hybridsteppingmotors.Byusingtheadvancedbipolar
constant-currentchoppingtechnique,it canoutputmorespeedand torquefromthesamemotor,
comparedwithtraditionaldrivers,suchas L/R drivers.Its3-statecurrentcontroltechnology
allowscoil currentstobewell controlledandwithrelativelysmall currentripple,thereforeless
motorheatingisachieved.
Features
lLowcostand good high-speedtorque
lSupplyvoltageup to+50VDC
lOutputcurrentupto4.2A
lOpticallyisolatedinputsignals
lPulse frequencyup to300KHz
lAutomaticidle-currentreduction
l3-statecurrentcontroltechnology
l15 selectableresolutions
lSuitablefor2-phase and 4-phas motors
lDIPswitchcurrentsettingwith8different
values
lCW/CCWmodeavailable(optional)
lOver-voltageand short-circuitprotection
lSmall size (118x75.5x33mm)
Applications
SuitableforawiderangeofsteppingmotorsfromNema size 17 to34.It canbeusedinvariouskinds
ofmachines,suchas X-Ytables,labelingmachines,lasercutters,engravingmachines,pick-place
devices,and soon.Particularlyadapttotheapplicationsdesiredwithlowvibration,highspeedand
highprecision.
2. Specifications andOperating Environment
ElectricalSpecifications (Tj =25 )
ME542
Parameters Min Typical Max Unit
OutputCurrent 1.0 - 4.2(3.0ARMS) A
Supplyvoltage 20 36 50 VDC
Logicsignalcurrent 7 10 16 mA
Pulse inputfrequency 0 - 300 KHz
Isolationresistance 500 MΩ
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Operating Environmentand otherSpecifications
Cooling NaturalCoolingorForcedcooling
Environment Avoiddust, oilfogand corrosivegases
AmbientTemperature 0 －50
Humidity 40%RH －90%RH
OperatingTemperature 70Max
OperatingEnvironment
Vibration 5.9m/s2 Max
StorageTemperature -20 －65
Weight Approx. 280gram(9.9oz)
MechanicalSpecifications (unit:mm, 1 inch =25.4 mm)
Front ViewSideView
Figure 1:Mechanicalspecifications
*Recommended touseside mountingforbetterheatdissipation
Elimination ofHeat
lDriver sreliableworkingtemperatureshouldbe<65,andmotorworkingtemperatureshould
be<80;
lIt isrecommendedtouse automaticidle-currentmode, namelycurrentautomaticallybereduced
to60%whenmotorstops, soas toreduce driverheatingandmotorheating;
lPlease mountthedriververticallytomaximizeheatsinkarea.
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3. PinAssignmentand Description
TheME542has twoconnectors,connectorP1forcontrolsignalsconnections,andconnectorP2for
powerand motorconnections.Thefollowingtables arebriefdescriptionsofthetwoconnectorsofthe
ME542.Moredetaileddescriptionsofthepinsandrelatedissues arepresentedinsection4,5,9.
ConnectorP1Configurations
PinFunction Details
PUL+(+5V)
PUL-(PUL)
Pulse signal: Insinglepulse (pulse/direction)mode,thisinputrepresents
pulse signal,activeforeachrising orfallingedge(setbyinsidejumperJ1);
4-5VwhenPUL-HIGH,0-0.5VwhenPUL-LOW.Indoublepulse mode
(pulse/pulse),thisinputrepresentsclockwise (CW)pulse，activeathigh
levelorlowlevel(setbyinsidejumperJ1).Forreliableresponse,pulse
widthshouldbelongerthan1.5μs.Series connectresistorsfor
current-limitingwhen+12Vor+24Vused.
DIR+(+5V)
DIR-(DIR)
DIR signal: Insingle-pulse mode,thissignalhas low/highvoltagelevels,
representingtwodirectionsofmotorrotation;indouble-pulse mode(setby
insidejumperJ2),thissignaliscounter-clock(CCW)pulse，activeathigh
levelorlowlevel(setbyinsidejumperJ1).Forreliablemotionresponse,
DIR signalshouldbeaheadofPULsignalby5μsatleast.4-5Vwhen
DIR-HIGH, 0-0.5VwhenDIR-LOW.
ENA+(+5V)
ENA-(ENA)
Enablesignal: Thissignalisusedforenabling/disablingthedriver.High
level(NPNcontrolsignal,PNPand Differentialcontrolsignalsareon the
contrary,namelyLowlevelforenabling.)forenablingthedriverand low
levelfordisablingthedriver. Usuallyleft UNCONNECTED(ENABLED).
SelectingActiveEdgeorActiveLevelandControlSignalMode
TherearetwojumpersJ1and J2insidetheME542 specificallyforthepurpose ofselectingactive
edgeoractivelevelandcontrolsignalmode,as showninfigure2.Default settingisPUL/DIR mode
and upward-risingedgeactive.
(a) J1,J2opencircuit(b)J1shortcircuit,J2opencircuit
PUL/DIRmodeandactiveatupward-risingedgePUL/DIRmodeandactiveatdownward-fallingedge
(c)J1opencircuit,J2shortcircuit (d)J1, J2shortcircuit
CW/CCWmodeandactiveCW/CCWmodeandactive
athigh level(Thefixedlevel)atlow level(Thefixedlevel)
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(e) PositionsofJ1andJ2
Figure 2:J1andJ2jumpers
ConnectorP2Configurations
PinFunction Details
Gnd DC powerground
+V DC powersupply,20~50VDC,Includingvoltagefluctuation and EMF
voltage.
A+,A- MotorPhase A
B+,B- MotorPhase B
4. ControlSignalConnector(P1)Interface
TheME542canacceptdifferentialandsingle-endedinputs(includingopen-collectorandPNP
output).TheME542has 3opticallyisolatedlogicinputswhicharelocatedonconnectorP1toaccept
linedrivercontrolsignals. These inputsareisolatedtominimize oreliminateelectricalnoises coupled
ontothedrivecontrolsignals.Recommend uselinedrivercontrolsignalstoincrease noise immunity
ofthedriverininterference environments.Inthefollowingfigures,connectionstoopen-collectorand
PNPsignalsareillustrated.
Figure 3:Connectionstoopen-collectorsignal(common-anode)
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Figure 4:ConnectiontoPNPsignal(common-cathode)
5. Connecting theMotor
TheME542drivercandriveany2-pahse and4-pahse hybridsteppingmotors.
Connectionsto4-lead Motors
4leadmotorsaretheleastflexiblebuteasiesttowire.Speedandtorquewill dependonwinding
inductance.Insettingthedriveroutputcurrent,multiplythespecifiedphase currentby1.4to
determinethepeakoutputcurrent.
Figure 5:4-leadMotorConnections
Connectionsto6-lead Motors
Like8leadsteppingmotors,6leadmotorshavetwoconfigurationsavailableforhighspeedorhigh
torqueoperation.Thehigherspeedconfiguration,orhalfcoil,issodescribedbecause it uses onehalf
ofthemotor sinductorwindings.Thehighertorqueconfiguration,orfull coil,uses thefull windings
ofthephases.
Half Coil Configurations
Aspreviouslystated,thehalfcoil configuration uses 50%ofthemotorphase windings.Thisgives
lowerinductance, hence,lowertorqueoutput.Liketheparallelconnection of8leadmotor,thetorque
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outputwill bemorestableathigherspeeds.Thisconfigurationisalsoreferredtoas halfchopper.In
settingthedriveroutputcurrentmultiplythespecifiedperphase (orunipolar)currentratingby1.4to
determinethepeakoutputcurrent.
Figure 6:6-leadmotorhalfcoil(higherspeed)connections
Full Coil Configurations
Thefull coilconfigurationonasixleadmotorshouldbeusedinapplicationswherehighertorqueat
lowerspeedsisdesired.Thisconfiguration isalsoreferredtoasfull copper.Infullcoilmode,the
motorsshouldberunatonly70%oftheir ratedcurrenttopreventoverheating.
Figure 7:6-leadmotorfull coil(higher torque) connections
Connectionsto8-lead Motors
8leadmotorsofferahighdegree offlexibilitytothesystemdesignerinthattheymaybeconnected
inseries orparallel, thussatisfyingawiderangeofapplications.
SeriesConnections
Aseriesmotorconfigurationwouldtypicallybeusedinapplicationswhereahighertorqueatlower
speedsisrequired. Because thisconfiguration has themostinductance, theperformance will start to
degradeathigherspeeds. Inseries mode, themotorsshouldalsoberunatonly70%oftheir rated
currenttopreventoverheating.
Figure 8:8-leadmotorseriesconnections
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ParallelConnections
An8leadmotorinaparallelconfiguration offersamorestable, butlowertorqueatlowerspeeds. But
because ofthelowerinductance,therewill behighertorqueathigherspeeds.Multiplytheperphase
(orunipolar)currentratingby1.96,orthebipolarcurrentratingby1.4,todeterminethepeakoutput
current.
Figure 9:8-leadmotorparallelconnections
6. PowerSupply Selection
TheME542canmatchmediumand small size steppingmotors(fromNema size 17 to34)madeby
Leadshineorothermotormanufactures around theworld.Toachievegood drivingperformances, it is
importanttoselectsupplyvoltageandoutputcurrentproperly.Generallyspeaking,supplyvoltage
determines thehighspeedperformance ofthemotor,whileoutputcurrentdetermines theoutput
torqueofthedrivenmotor(particularlyatlowerspeed).Highersupplyvoltagewill allowhigher
motorspeedtobeachieved, attheprice ofmorenoise and heating.Ifthemotion speedrequirementis
low, it sbettertouse lowersupplyvoltagetodecrease noise, heatingand improvereliability.
Regulated orUnregulated PowerSupply
Bothregulatedandunregulatedpowersupplies canbeusedtosupplythedriver.However,
unregulatedpowersupplies arepreferredduetotheirabilitytowithstandcurrentsurge.Ifregulated
powersupplies (suchas mostswitchingsupplies.)areindeedused,it isimportanttohavelarge
currentoutputratingtoavoidproblemslikecurrentclamp,forexampleusing4Asupplyfor3A
motor-driveroperation. Ontheotherhand, ifunregulatedsupplyisused, onemayuse apowersupply
oflowercurrentratingthanthatofmotor(typically50%～70%ofmotorcurrent).Thereason isthat
thedriverdrawscurrentfromthepowersupplycapacitoroftheunregulatedsupplyonlyduringthe
ON durationofthePWMcycle,butnotduringtheOFF duration.Therefore,theaveragecurrent
withdrawnfrompowersupplyisconsiderablyless thanmotorcurrent.Forexample,two3Amotors
canbewell suppliedbyonepowersupplyof4Arating.
Multiple Drivers
It isrecommendedtohavemultipledriverstoshareonepowersupplytoreduce cost,ifthesupply
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has enoughcapacity.Toavoidcross interference, DONOT daisy-chainthepowersupplyinputpins
ofthedrivers. (Instead,please connectthemtopowersupplyseparately.)
Attention: NEVERconnectpowerand groundinthewrongdirection,as it will damagetheME542.
Selecting SupplyVoltage
ThepowerMOSFETSinsidetheME542 canactuallyoperatewithin+20V－+50VDC,including
powerinputfluctuationandbackEMF voltagegeneratedbymotorcoilsduringmotorshaft
deceleration.Highersupplyvoltagecanincrease motortorqueathigherspeeds,thushelpfulfor
avoidinglosingsteps.However,highervoltagemaycause biggermotorvibrationatlowerspeed,and
it mayalsocause over-voltageprotectionorevendriverdamage.Therefore,it issuggestedtochoose
onlysufficientlyhighsupplyvoltageforintendedapplications,and it issuggestedtouse power
supplies withtheoreticaloutputvoltageof+20～+45V,leavingroomforpowerfluctuation and
back-EMF.
7. Selecting MicrostepResolutionand DriverOutputCurrent
Thisdriveruses an8-bitDIPswitchtosetmicrostepresolution,andmotoroperatingcurrent,as
shownbelow:
Microstep Resolution Selection
Microstepresolution issetbySW5, 6, 7, 8oftheDIPswitch as showninthefollowingtable:
Microstep Steps/rev.(for1.8°motor) SW5 SW6 SW7 SW8
2 400 OFF ON ON ON
4 800 ON OFF ON ON
8 1600 OFF OFF ON ON
16 3200 ON ON OFF ON
32 6400 OFF ON OFF ON
64 12800 ON OFF OFF ON
128 25600 OFF OFF OFF ON
5 1000 ON ON ON OFF
10 2000 OFF ON ON OFF
20 4000 ON OFF ON OFF
25 5000 OFF OFF ON OFF
40 8000 ON ON OFF OFF
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50 10000 OFF ON OFF OFF
100 20000 ON OFF OFF OFF
125 25000 OFF OFF OFF OFF
CurrentSettings
Foragivenmotor,higherdrivercurrentwill makethemotortooutputmoretorque,butatthesame
timecausesmoreheatinginthemotoranddriver.Therefore,outputcurrentisgenerallysettobesuch
thatthemotorwill notoverheatforlongtimeoperation.Since parallelandserialconnectionsof
motorcoilswill significantlychangeresultinginductance andresistance,itisthereforeimportantto
setdriveroutputcurrentdependingonmotorphase current,motorleadsandconnectionmethods.
Phase currentratingsuppliedbymotormanufacturerisimportantinselectingdrivercurrent, however
theselection alsodependson leadsand connections.
Thefirstthree bits(SW1,2,3)oftheDIPswitchareusedtosetthedynamiccurrent.Selectasetting
closesttoyourmotor srequiredcurrent.
DynamicCurrentSetting
Peakcurrent(A) RMS (A) SW1 SW2 SW3
1.00 0.71 ON ON ON
1.46 1.04 OFF ON ON
1.91 1.36 ON OFF ON
2.37 1.69 OFF OFF ON
2.84 2.03 ON ON OFF
3.31 2.36 OFF ON OFF
3.76 2.69 ON OFF OFF
4.20 3.00 OFF OFF OFF
Notes: Duetomotorinductance,theactualcurrentinthecoilmaybesmallerthanthedynamic
currentsettings,particularlyunderhighspeedcondition.
Standstill CurrentSetting
SW4isusedforthispurpose.OFFmeaningthatthestandstill currentissettobehalfofthedynamic
current, andON meaningthatstandstillcurrentissettobethesame as dynamiccurrent.
Thecurrentautomaticallyreducedto60%ofdynamiccurrentsettingonesecond afterthelastpulse.
Theoretically,thiswill reduce motorheatingto36%(duetoP=I2*R) oftheoriginalvalue.Ifthe
applicationneedsadifferentstandstill current,please contactLeadshine.
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8. Wiring Notes
lInordertoimproveanti-interference performance ofthedriver,itisrecommendedtouse
twistedpair shieldcable.
lTopreventnoise incurredinPUL/DIR signal,pulse/direction signalwires and motorwires
shouldnotbetieduptogether.Itisbettertoseparatethembyatleast10 cm,otherwise the
disturbingsignalsgeneratedbymotorwill easilydisturbpulse direction signals,causingmotor
positionerror, systeminstabilityand otherfailures.
lIfapowersupplyserves severaldrivers,separatelyconnectingdriversisrecommendedinstead
ofdaisy-chaining.
lIt isprohibitedtopull andplugconnectorP2whilethedriverispoweredON,because thereis
highcurrentflowingthroughmotorcoils(evenwhenmotorisatstandstill). Pullingorplugging
connectorP2withpoweron willcause extremelyhighback-EMFvoltagesurge,whichmay
damagethedriver.
9. TypicalConnection
Acompletesteppingsystemshouldincludesteppingmotor,steppingdriver,powersupplyand
controller(pulse generator).Atypicalconnectionisshownas figure10.
Figure 10:Typicalconnection
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10. Sequence ChartofControlSignals
Inordertoavoidsomefault operationsand deviations,PUL,DIR and ENAsignalsmustabideby
somerules,as showninthefollowingdiagram(assumingJ1default settingisupward-risingedge
effective):
Figure 11:Sequencechartofcontrol signals
Remark:
(1) t1:ENAmustbeaheadofDIR byatleast5μs.Usually,ENA+and ENA-areNC (not
connected).See “ConnectorP1Configurations”formoreinformation.
(2) t2:DIR mustbeaheadofPULactiveedgebyatleast5μstoensurecorrectdirection;
(3) t3:Pulse widthnotless than1.5μs;
(4) t4:lowlevelwidthnotless than1.5μs.
11. ProtectionFunctions
Toimprovereliability, thedriverincorporates somebuilt-inprotectionsfeatures.
Over-voltage protection
Whenpowersupplyvoltageexceeds+52VDC,protection will beactivatedand powerindicatorLED
will turnred. Whenpowersupplyvoltageislowerthan+20VDC,thedriverwill notworksproperly.
Coil-ground ShortCircuit Protection
Protectionwill beactivatedincaseofshort circuitbetweenmotorcoil andground.
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Attention:Since thereisnoprotectionagainstpowerleads(﹢, ﹣)reversal,itiscriticaltomake
surethatpowersupplyleadscorrectlyconnectedtothedriver.Otherwise,thedriverwill bedamaged
instantly.
12. FrequentlyAskedQuestions
IntheeventthatyourME542 doesn toperateproperly,thefirststepistoidentifywhetherthe
problemiselectricalormechanicalinnature.Thenextstepistoisolatethesystemcomponentthat
iscausingtheproblem.Aspartofthisprocess you mayhavetodisconnecttheindividual
componentsthatmakeup yoursystemand verifythattheyoperateindependently. It isimportantto
documenteachstepinthetroubleshootingprocess. You mayneedthisdocumentation toreferback
toatalaterdate,andthese detailswill greatlyassistourTechnicalSupportstaffindeterminingthe
problemshouldyou needassistance.
Manyoftheproblemsthataffectmotion controlsystemscanbetracedtoelectricalnoise,
controllersoftwareerrors, ormistakeinwiring.
ProblemSymptomsand Possible Causes
Symptoms PossibleProblems
Nopower
Microstepresolution settingiswrong
DIPswitchcurrentsettingiswrong
Fault conditionexists
Motorisnotrotating
Thedriverisdisabled
Motorrotates inthewrongdirection Motorphases maybeconnectedinreverse
DIPswitchcurrentsettingiswrong
Thedriverinfault Somethingwrongwithmotorcoil
Controlsignalistooweak
Controlsignalisinterfered
Wrongmotorconnection
Somethingwrongwithmotorcoil
Erraticmotormotion
Currentsettingistoosmall, losing steps
Currentsettingistoosmall
Motorisundersizedfortheapplication
Acceleration issettoohigh
Motorstallsduringacceleration
Powersupplyvoltagetoo low
Inadequateheatsinking/cooling
Automaticcurrentreduction function notbeingutilized
Excessivemotoranddriverheating
Currentissettoohigh
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APPENDIX
Twelve MonthLimited Warranty
LeadshineTechnologyCo., Ltd.warrantsitsproductsagainstdefectsinmaterialsand
workmanshipforaperiodof12monthsfromshipment outoffactory.Duringthewarrantyperiod,
Leadshinewill either, atitsoption, repair orreplace productswhichprovedtobedefective.
Exclusions
Theabovewarrantydoes notextendtoanyproductdamagedbyreasonsofimproperorinadequate
handlingsbycustomer,improperorinadequatecustomerwirings,unauthorizedmodification or
misuse,oroperation beyond theelectricalspecificationsoftheproductand/oroperation beyond
environmentalspecificationsfortheproduct.
Obtaining Warranty Service
Toobtainwarrantyservice,areturnedmaterialauthorization number(RMA)mustbeobtained
fromcustomerservice ate-mail: [e-mail] beforereturningproductforservice.
Customershall prepayshippingcharges forproductsreturnedtoLeadshineforwarrantyservice,
and Leadshineshallpayforreturnofproductstocustomer.
Warranty Limitations
Leadshinemakes no otherwarranty,eitherexpressedorimplied,withrespecttotheproduct.
Leadshinespecificallydisclaimstheimpliedwarranties ofmerchantabilityand fitness fora
particularpurpose.Somejurisdictionsdonotallowlimitationsonhowlongandimpliedwarranty
lasts, sotheabovelimitation orexclusion maynotapplytoyou. However, anyimpliedwarrantyof
merchantabilityorfitness islimitedtothe12-monthdurationofthiswrittenwarranty.
Shipping Failed Product
Ifyourproductfail duringthewarrantyperiod,e-mail customerservice at [e-mail] to
obtainareturnedmaterialauthorizationnumber(RMA)beforereturningproductforservice.
Please includeawrittendescriptionoftheproblemalongwithcontactnameand address.Send
failedproducttodistributorinyourarea or: LeadshineTechnologyCo., Ltd.Floor3,Block2,
Nanyou TiananIndustrialPark,NanshanDist,Shenzhen,China. Alsoenclose information
regardingthecircumstances priortoproductfailure.
Authorized Distributor of Leadshine Technology www.leadtronker.com
www.leadtronker.com雷赛智能官方代理：雷创智能科技