I just received my unit and built it, relatively easy process so far. I’ve updated the firmware etc, also all fine. Got the the part where I should jog the Z axis, nothing, just a gentle whir but nothing actually moved.
I swapped the cables around on the steppers so the left stepper was plugged into the right hand port etc and still only the same stepper moves, so I’m guessing a failed stepper? Is there any other explanation or step I’ve missed maybe?
I recorded a video of what it’s doing. I set it to move 1mm so as not to bend the frame too much. It’s the right side stepper that is moving in the video.
I’d be trying to check for binding / trying it no load next.
If you hold the lead screws and manually turn them to raise/lower - it might be that it feels that one is binding.
But a very simple test would be to (manually) raise it all the way until the screws are free from the nuts, prop the router cage up and free, and retest the z-motors with no load like that and see if you see the same behaviour or if they start turning like that (my guess is they don’t, but it’s worth a check).
3 possibilities, Faulty Z motor or cable, Faulty control board or misalignment of Z motors.
If you can wind both motors up until the router is off the screws, and check if both motors run. If only one runs then you may have a faulty control board. try swapping the cables to see if fault follows the port.
If they both run when free, then they a probably binding because the motors are slightly out of alignment, To fix, loosen the Z motor screws on the sled and lower the Z right down to the sled, then tighten the screws, and it should fix your problem.
Sorry I should have given more details. Both motors turn freely when spun by hand. It’s pretty easy to move the router up and down by hand, so I don’t think it’s binding or jammed.
Both ports on the board seem to work. Only one stepper works. The fault follows the stepper, not the port. (That’s what I was trying to show in the video).
