Hi,
I have the MK F20DP kit with steppers, housings, belts and whatnot from Optimum.
Attachment 284226
I have recently replaced all the leadscrews with ballscrews and I borrowed one of the holding nuts from the original Z leadscrew to help me fix the belt pulley that goes on the ballscrew end. But upon trying to move the axis, I noticed two things:
1st: Even though I set the motor side pulley as far from the motor and down onto the housing as I could, the belt went upwards on the ballscrew side and like half of it was protruding the pulley. So maybe the pulley on the ballscrew side was too low, but then again... well see point 2
2nd: After the first test of lowering and raising the head, it wouldn't go down anymore... When I checked I saw this:
Attachment 284222
The belt was now in place, but the nut that I fitted on top had come loose, and I swear I made it tight
Attachment 284224
And the pulley is not even thoroughly inserted in the ballscrew. Also it's just threaded and has no bores for holding pins or something. So how am I supposed to fix it to the ballscrew? Oh and yes I drew the ballscrew up against the bearing... This doesn't make sense. It seems too short. And I don't see how the pulley is supposed to stay in place anyways.
Thanks for any help