cannot change parameters in powerstep01

[Sven Burdorf]

Posted on August 04, 2017 at 15:32

Hi everyone,

I have a weird problem with the powerstep01 on a X-NUCLEO-IHM03A1. I want to change to driver parameters KVAL_HOLD, KVAL_RUN, KVAL_ACC, KVAL_DEC, INT_SPEED, ST_SLP, FN_SLP_ACC, FN_SLP_DEC. All works as expected as long as I use a single board. However, if I use use a stack of three boards in a daisy chain I can only change 

KVAL_

HOLD

, KVAL_RUN, KVAL_ACC, KVAL_DEC while the other parameters remain unchanged. All motors are stopped and HiZ.

Any help is much appreciated.

#powerstep01-stepper-motor-driver #powerstep01

[Sven Burdorf · Accepted solution]

Posted on August 04, 2017 at 16:55

Ok, I got it. Issued a soft stop command before writing to the registers which forces the motors out of HiZ. Use of the soft_hiz command fixed the issue.