LR4 gantry lift router side

[azab2c]

0:09 sound like motor skipping steps to me.

Did you lube that lower portion of the leadscrews really well? Make sure temp stickers are adhered to Steppers first before lubing anything.

Something that previously help me fix Z axis leadscrew binding :

@azab2c

With the YZ plates as vertical as possible, and Beam as low as possible…
Try loosening bolt between Z Nut and Z Stub. Play with the leadscrew angle, find out how far the leadscrew can slide within the Stub’s slotted hole, then, position in the center (or wherever the least bend force on coupler is)… Thank/blame Jamie for this technique.

Then, loosely snug the bolt connecting Nut and Stub. Snug just enough to engage the Nylock, don’t tighten to the point that pressure gets applied between the parts that would add friction/resistance to Z travel.

Good luck!