yfleong

Sina, I did set this before, not working. Totally no response form address $721 even I change the bit enable mask value to $000FFF. regards

Sina, follow your instruction, I103 = $710. Currently, I found count different by 128 compare to M105. Previously use A/D conversion of location $C005, different by 16 count. Any idea?

I'm using Pmac2A/PC104 with OPT12. 12bits ADC input, I wish to use this input as the motor feedback device. I did follow the instruction set the following CPU Analog Inputs I903 = 1746 ;Set ADC clock frequency at 4.9152 MHz WX:$C014, $1FFFFF ;Clock strobe set for bipolar inputs M105->X:$0710,12,12,S ;ADCIN_1 on JMACH1 connector pin 45 M205->X:$0711,12,12,S ;ADCIN_2 on JMACH1 connector pin 46 During set-up encoder conversion table, there are only "Acc28 A/D register (no rollover)" in conversion type. Source Address "$C005 PMAC2(ADC1A)" But, I found that the value at position not tally to the value M105. The origin position feedback is 16 bits data, how to configure it to 12 bits?

Thanks for your advise... I have tested the Ix30 & Ix33 need to be sensitive in order to get less position error. Not recommended to do such a way. The optimize still matching the same step and encoder resolution.

I am using Pmac2, I need to set-up a stepper motor with encoder feedback. Encoder counts x4 decode is 8192cts/rev. Most of the stepper driver do not have exact matching step size, example stepping set to 12800 pulse/rev. When running the motor, it seems that require very long settling time to reach the actual position. Any parameter need to change instead Ix30 servo loop gain?