One z motor don’t always move

droftarts

@elliott-griffiths It's fine to run the two motors on the same axis on independent drivers. It allows the axis to be levelled automatically. See https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors

@Alucardi you could run both Z motors from the Z driver as @elliott-griffiths suggests, but no, you can't then use G32. On the plus side, once you level the bed by hand, they are far less likely to go out of sync. If you want to test this, rewire the motors (with POWER OFF, or you risk damaging the stepper drivers), do the changes to config.g I say above, then change M584 to:
M584 X0 Y1 Z2 E3

Ian

Alucardi

@droftarts firmware is 2.05.1
I will try your suggestions tonight. I know I could run of same driver but if it’s a defective drive I would still get it fixed but let’s hope it’s just firmware and nothing else.

ChrisP

M8 S30 should also be M84 S30 too, FWIW.

Alucardi

@ChrisP do I really want that command? It mentioned that it won’t be that great during a print. If I do layers that above the idle time won’t it be able to sag if z goes to idle if not being used?

ChrisP

@Alucardi It's a good question, tbh. I was under the impression that any move on any axis would reset the counter. I've just gone and had a quick look at teh firmware source, and that does appear to be the case too. So as long as your printer is moving at least on motor in that time, I think you should be fine.

Reference: see here, that the S parameter is parsed independantly of the axis.

droftarts

@ChrisP said in One z motor don’t always move:

@Alucardi I was under the impression that any move on any axis would reset the counter ... So as long as your printer is moving at least on motor in that time, I think you should be fine.

Yes, that's correct. It will only idle the motors when ALL motors have stopped moving for over 30 seconds, if M84 S30 is set.

Ian

Alucardi

@droftarts i changed the code and after running a g32 I got a motor sound (after it adjusted the bed when printer was idle it gave a sound froM the motor) which I never heard before so I guess something changed. I will try homing and a few other more tonight, hopefully it’s fixed but it’s hard to force the issue so time will tell.

Alucardi

@droftarts well I have I bin running the printer a lot tonight with short prints. I have bin trying to get PA calibrated which really is a pain. So far no issues.

droftarts

@Alucardi Great, hopefully that's fixed it.

Ian

Alucardi

@droftarts Still no problems. My g32 usually reported like deviation of -0.150 or so. Now its always below -0.014 or less. So i would think this is a fixed problem now. I appreciate al lthe support and help.