I've experienced same behavior when using A4988 drivers. I think problem is related to motors coil's impedance when connected in parallel. I measured Vref in fullstep, I did use formula involving Rs to get proper Vref for my drivers and motors. Nothing helped, decreasing nor increasing Vref. I have switched over to TB8825 and problem is gone! Motors runs smoothly. As i said, it might be due the impedance of motors connected in parallel.
Max Vaistuk it looks like they are turning in opposite directions. if so it's easy to tell on to flip in software. there are also 2, 4 pin terminals for the Z steppers on the board. better to use them, one set for each stepper, for easier configuration.
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do you enable dual z axis in advconfig?
I've experienced same behavior when using A4988 drivers. I think problem is related to motors coil's impedance when connected in parallel. I measured Vref in fullstep, I did use formula involving Rs to get proper Vref for my drivers and motors. Nothing helped, decreasing nor increasing Vref. I have switched over to TB8825 and problem is gone! Motors runs smoothly. As i said, it might be due the impedance of motors connected in parallel.
I couldn't find the TB8825, just a DRV8825. But it said it was a replacement for the A8825. Can I use the DRV8825 instead of the TB8825?
any solution?
What was the problem to this?
Max Vaistuk it looks like they are turning in opposite directions. if so it's easy to tell on to flip in software. there are also 2, 4 pin terminals for the Z steppers on the board. better to use them, one set for each stepper, for easier configuration.