I guess no one cared about the previous issue since it sounds idiotic from my side haha anyway I solved the issues I verified my grounding concept is sound ( I think lol )

appreciate any input on a new issue: I got my X and Y axis setup to travel at 10m/min 1m/s^2 and they do so decently but my Z can't handle more than 7m/min .5m/s^2 , I tested the motor without any load and it was fine upto the desired speeds but not when connected back again with the belt. my question is what can I do to make it better? two reasons I can think of is the linear rails might not be aligned perfectly with the ballscrew causing it to use more force, should I open it all up and tweak? also the weight of the spindle is maybe 12KG or so (feels heavier for sure) might it be that the motor just doesn't have enough torque to move it at high acceleration?

all my motors are 3.1Nm nema23 from zappautomation btw