Y-Axis issue setting up a CoreOne kit
Hello,
I recently assembled my first printer, a CoreOne kit, but I'm having some issues during the initial setup. Everything is working except for two tests: the filament runout sensor is unresponsive, and the Y-axis calibration is failing. I'm not too worried about the filament sensor right now, but I need help with the Y-axis.
I've tuned both belts to 85 and 86 Hz. When I test the Y-axis, it moves to the front-right corner and keeps banging back and forth for a while. It seems to move diagonally a few millimeters, trying to reach the corner but not quite succeeding. Eventually, it moves all the way to the back, comes forward, and then stops, indicating a failure.
What is it trying to do here? What should I be looking for?
RE: Y-Axis issue setting up a CoreOne kit
There is a long thread about these issues here.
My printer would also do a similar motion when it attempted the y-axis calibration. When the nextruder would move to the front of the printer it would drift left. I had installed the pulley on the x-axis motor upside down. I flipped it to the correct orientation and my printer passed all calibrations the first try after that.
The common issues are a core xy gantry out of square, belts not perfectly tuned, and the pulleys on the x-axis or y-axis motor not being installed properly during setup.
The problems listed above have all been troubleshot in the link to the other forum post I shared.
Good luck!
RE: Y-Axis issue setting up a CoreOne kit
Once you fixed the Y calibration and want to check on the filament sensor: If the sensor is stuck in "I see filament" mode, try the following.
Take off the right side panel, remove the sensor from the printer, and take off its cover. Check whether the magnet which sits in the little lever is sticking out a bit too far on the top (lid) side. The magnet is about 1 mm wider than the plastic part. If it sticks out too much, it will touch the lid once that is installed. Hence the lever can no longer move freely, even if everything looked fine when Prusa's assembly instructions asked you to check (before closing the lid).
Just push the magnet in a bit further -- but not too far, you don't want it to touch the bottom of the sensor housing either.
RE: Y-Axis issue setting up a CoreOne kit
Verify that the cable from the filament sensor is not interfering with the Y axis. That cable caused my Y-axis failure.
RE: Y-Axis issue setting up a CoreOne kit
Big dummy here -
I struggled with Y-Axis calibration. Had very positive exchanges with the tech support team and determined that I had installed the pully gear the wrong way on my X motor. The one error I made on my build, but it made a huge difference of course. Odd that even with it on wrong I was able to get close enough that I thought I was on the right track. As I said, big dummy.
Corrected that situation and it calibrated straight away and now I am printing.
One comment I would add, probably best to do the full calibration before you install the side panels and top so that access is easier until you are all dialed in.
Also, the proper config as a reminder below.
JB
