I run a rack & pinion setup and use CandCNC Electronics. My Y Axis uses two motors which are slaved. Motor tuning and steps have been set up equally on both motors.
I use it as a plasma cutter and do routing work as well with it. I am really happy with it but encountered a problem.
When I do a pattern with a lot of holes and a lot of different movements the machine starts running wrong and losing it's correct positioning.
Meaning for example, that the cuts for the outlines (cut after the holes) are 1 or 2 inches from where it should be.
When I then "Home" the two axis - the one side "arrives" a little later than the other.
Has somebody experienced something like this and could lead me in the right direction how to fix it?