In the inscructions, for the ACME lead screw, there is no instruction whatsoever to "break the delrin nut in".
Only for the M8mm, because the video is for the M8mm one.
They just tell you to put it in, and that's all. Even the video for that procedure is inside the accordion of the M8 threaded rod. So, therefore, I skipped it.
That said, I jogged it in, and it's better. It can go to the top now. I also put a bit more current to the motor.
Also, in the homing setup it did get to the top, crushing my limit switch . They should put an in-between step that is as simple as:
Limit switches test:
Please, activate the Z Swich
Please, activate the X switch
Please, activate the Y switch
Al seems correct!
[Start homing session?]
I am very dissapointed at this....