2
« on: April 13, 2016, 11:14:24 PM »
Hello,
I just found out I'm losing steps in the Z axis, never noticed until I just tried to cut a lithophane. All the rapid Z movements involved really showed it.
I tried everything I could think of to figure out why, including lowering vel and accel, changing cables, swapping motors, swapping pc's, and rewiring everything.
No changes.
I then started looking at the USB connection. I took the PMDX-410 out of my control cabinet and it did get better but It's still happening.
Is there any way to determine if it is the 410 causing this??
My setup is originally an intel NUC running Win 10 Pro (went to a win7 pro when I swapped PC), to the 410, parallel to a G540, to a NEMA23 380 oz-in motor with a 1/2"- 10 single start leadscrew, Velox ZA800QR Z carriage with a porter cable 7518 and superPID.
All cables are shielded and grounded at the control box end, all to a common ground.
The lost steps are always moving the Z in the + direction, so If I start at 0, by the end of the lithophane I'll be somewhere near +.1.