I've been trying to work out an issue with backlash on my kossel xl. I built it using DC42's guide, almost exactly. I understand the ridges relate to backlash but I can't seem to find it. Actually, I'm not sure which motor it is on based on the direction of the ridges.
The printer does a good job printing, I just have some backlash that's visible depending on what I print.
One of the stepper drivers on my duet wifi is bad. I switched to use the E2 stepper. Could this be related? It says there's a short to ground.
I put some more points on the auto calibration file. It calibrates at around 0.04. I've had it down to as low as 0.02, but the problem with backlash seems to be getting worse.
Things I've tried:
Lowering accel/jerk as much as possible.
Lowering speed and dive height on probe.
Checking the frame is square and level. Build plate is level as far as my micrometer can tell.
Lubricating magballs, carriers, linear rails
Removing zesty nimble entirely
Checking for loose magballs
Things I've found:
The magballs need a lot of regular lubrication. Like every 24 hours of printing.
Linear rails need lubrication every month or so.
One of my rods is bent on the Z axis. When you rotate it on the magball, you can see the bend in it.
My steppers vibrate pretty bad at above 1.5a current. They never get hot. I just leave it at 1500ma.
I tried using steel core belts. I think it helped some but they were wearing out the pulleys so I switched back.
Followed DC42's large kossel guide
Duet wifi with smart effector
Rubber gt2 belts, fiber reinforced from amazon
1m linear rails with genuine hiwin carriages and duet3d pcb !magball mounts
Haydn's arms 480mm
400mm diameter bed on mic6 plate
16 tooth pulleys, smooth upper pulleys
moons 0.9 2.0a steppers
Firmware Version: 2.02(RTOS) (2018-12-24b1)
WiFi Server Version: 1.21
Web Interface Version: 1.22.6