I'm in the process of putting together a kit from Avid CNC (CNC Router Parts). I got everything setup and working, but one thing is vexing me. The machine runs super smooth as long as it's jogging in one direction, but every time a motor reverses, it jerks in the other direction instead of moving smoothly.
I uninstalled a motor to test on my workbench and got the same behavior. Super smooth rotating in one direction, but reversing direction causes the motor to jump. This happens both when I reverse direction immediately and when I wait a bit between direction changes.
Anyone have an idea as to what the problem might be?
My setup:
Linux CNC
Nema 34 stepper motors
Gecko GR214V drivers
Mesa 6I25/7I76 I/O cards