// Here we use 'real encoder with direct PWM'. Further the axis are scaled // in this configuration, the PID gives 'torque' to iqCmd. // the phasePos is received from tne encoder on the motor shaft. // The idCmd is set to 0 // the PID regulates the position by setting torque, if the motor is not at the desired position // Compared to 'real encoder with direct microstepping', following main elements have to be reconfigured: // SlipGain=0 (instead 0.25) ,PhasePosSf= calculated value (instead of 0) // look also at PwmSf,PhaseMode,PhaseCtrl, // -> PhasePosSf is calculated as follows: (2048*pole_cycle)/(256*enc_step) = 8*pole_cycle/enc_step // e.g. Motor[x].pPhaseEnc -> PowerBrick[.].Chan[.].PhaseCapt.a // 1 rev = 8192 phase_step = 4 pole_cycle = 512000 PhaseCapt =256*2000 (256=scaling of encTable, 2000=enc_step/rev) // PhasePosSf 8*4/2000=0.016 // x einraster == -> x-N and x-S poles =2*x poles -> 1 rev = x*2048 ustep=phase_step // changing the polarity from S-N-S (one pole cycle) are 2048 phase_step. phase_step is also called ustep //Mot 1: Rotation stage LS Mecapion MDM-DC06DNC0H 32 poles = 1 rev = 16*2048=32768 phase_step //Enc 1: Rotation stage LS Mecapion 1 rev = 1048576 enc_steps //Mot 2: Stage Y Parker MX80L D11 25mm one pole cycle = 13mm = 2048 phase_step //Enc 2: Stage Y Parker MX80L D11 inc_enc 20nm one pole cycle = 13mm = 650000 enc_step (20nm/enc_step) //Mot 3: Stage X Parker MX80L D11 25mm one pole cycle = 13mm = 2048 phase_step //Enc 3: Stage X Parker MX80L D11 inc_enc 20nm one pole cycle = 13mm = 650000 enc_step (20nm/enc_step) //rot stage //--------- //use 360'000 for 360 deg as motor unit //1 rev = 16*2048=32768 phase_step = 1048576 enc_steps //PhasePosSf= 8*el_cycle/enc_step =8*16/1048576=1./8192 //Motor[1].pPhaseEnc=EncTable[1].pEnc=Acc84B[0].Chan[0].SerialEncDataA.a // -> PhasePosSf is calculated as follows: (2048*pole_cycle)/(256*enc_step) = 8*pole_cycle/enc_step //PhasePosSf = (2048*pole_cycle)/(SerialEncDataA)=8*16/1048576=1/32 !encoder_sim(enc=1,tbl=9,mot=9,posSf=360000./32768) !encoder_biss(enc=1,tbl=1,mot=1,numBits=20,posSf=360000./1048576) Motor[1].pPhaseEnc=Acc84B[0].Chan[0].SerialEncDataA.a //Motor[1].pAbsPhasePos=Acc84B[0].Chan[0].SerialEncDataA.a !motor_servo(mot=1,ctrl='ServoCtrl',Kp=0.8,Kvfb=20,Ki=0.001,Kvff=40,Kaff=0,MaxInt=1000) !motor(mot=1,dirCur=0,contCur=1000,peakCur=2000,timeAtPeak=1,IiGain=1.5,IpfGain=0,IpbGain=3,JogSpeed=180.,numPhase=3,invDir=True,servo=None,PhasePosSf=1./8192,PhaseFindingDac=100,PhaseFindingTime=50,SlipGain=0,AdvGain=0,PwmSf=10000,FatalFeLimit=3000,WarnFeLimit=1000,InPosBand=10) //Stage Y Parker MX80L //-------------------- //Motor[2].pPhaseEnc -> PowerBrick[0].Chan[1].PhaseCapt.a // 1 el_step = 13mm = 2048 phase_step = 166400000 PhaseCapt =256*650000 (256=scaling of encTable) // -> PhasePosSf=(2048*el_cycle)/(256*enc_step) = 8*el_cycle/enc_step =2048*1/(256*650000)=8*1/650000=1./81250=1.23077e-05 //2048 phase_step =166400000 PhaseCapt -> PhasePosSf = 2048/166400000= 2048./(256*650000) //use um as motor unit !encoder_sim(enc=2,tbl=10,mot=10,posSf=13000./2048) !encoder_inc(enc=2,tbl=2,mot=2,posSf=13000./650000) //!motor_servo(mot=2,ctrl='ServoCtrl',Kp=20,Kvfb=1000,Ki=0.07,Kvff=1000,Kaff=4000,MaxInt=1000) !motor_servo(mot=2,ctrl='ServoCtrl',Kp=20,Kvfb=220,Ki=0.02,Kvff=240,Kaff=1500,MaxInt=1000) !motor(mot=2,dirCur=0,contCur=800,peakCur=2400,timeAtPeak=1,IiGain=1,IpfGain=0,IpbGain=2,JogSpeed=10.,numPhase=3,invDir=True,servo=None,PhasePosSf=1./81250,PhaseFindingDac=100,PhaseFindingTime=50,SlipGain=0,AdvGain=0,PwmSf=10000,FatalFeLimit=200,WarnFeLimit=100,InPosBand=2,homing='enc-index') //Stage X Parker MX80L (top stage, mounted on Y stage) //---------------------------------------------------- //Motor[3].pPhaseEnc -> PowerBrick[0].Chan[1].PhaseCapt.a // 1 el_step = 13mm = 2048 phase_step = 166400000 PhaseCapt =256*650000 (256=scaling of encTable) // -> PhasePosSf=(2048*el_cycle)/(256*enc_step) = 8*el_cycle/enc_step =2048*1/(256*650000)=8*1/650000=1./81250=1.23077e-05 //2048 phase_step =166400000 PhaseCapt -> PhasePosSf = 2048/166400000= 2048./(256*650000) !encoder_sim(enc=3,tbl=11,mot=11,posSf=13000./2048) !encoder_inc(enc=3,tbl=3,mot=3,posSf=13000./650000) !motor_servo(mot=3,ctrl='ServoCtrl',Kp=20,Kvfb=220,Ki=0.02,Kvff=240,Kaff=1500,MaxInt=1000) //PhaseFreq=20000,PhasePerServo=1 -> Kvfb=220*4 Ki/=4,Kvff*=4,Kaff*=4*4 !motor(mot=3,dirCur=0,contCur=800,peakCur=2400,timeAtPeak=1,IiGain=1,IpfGain=0,IpbGain=2,JogSpeed=10.,numPhase=3,invDir=True,servo=None,PhasePosSf=1./81250,PhaseFindingDac=100,PhaseFindingTime=50,SlipGain=0,AdvGain=0,PwmSf=10000,FatalFeLimit=200,WarnFeLimit=100,InPosBand=2,homing='enc-index') //Interferometer 1 Stage Y Parker MX80L (bottom stage) //---------------------------------------------------- !encoder_inc(enc=4,tbl=4,mot=4)# ,posSf=13000./650000) !encoder_inc(enc=5,tbl=5,mot=5)# ,posSf=13000./650000)