pootle
commented
5 years ago Oops - how did that escape!
To get the fastest speed, test with a fairly slow ramp rate set. Also the higher the driving voltage you can use the better, and use current limiting to stop it heating up - although I've not messed with current limiting on these chips, I used it to good effect on an a4988. The fastest step rate in the datasheet for the motor should be a good starting point. They tend not to have much torque at high speed, so depending on the load you have to drive, you mahy have to back off a bit.
Good luck!
Hi there --- I've now got the right board with R1 deleted and this code is working for me.
I've found that updateSettings throws this error:
mot.updateSettings([{'maxrpm':10}]) Traceback (most recent call last): File "", line 1, in
File "/home/pi/tripipy/chipdrive.py", line 106, in updateSettings
if 'stepsPerRev' in upates:
NameError: name 'upates' is not defined
Line 106 has upates instead of updates.
Now I'm trying to work out the settings for the quietest possible drive of a Nema 17 - perhaps a couple of pointers would help and I'll document my findings!
Double Regards
Andy