Calibration failed - check axes
Cross post from the 2.5 forum as this forum is much more active and I am hopeful for a bit of help.
Hello
Just spent memorial day upgrading my old MK2 to the MK2.5 kit. Was quite a day. Finished assembly and began calibrating but continue to run into the dreaded "Check the Axes and Run Again" error. Which is particularly tricky to trouble shoot. I have read the forum posts and checked quite a few things without turning up a solution. Specifically I have:
After some thinking, I noticed that the autohome lands in different spots depending on what routine I am running. If I run the autohome routine, it gets the Pinda pretty close, but on XYZ calibration it starts pretty far away. I am speculating that because I am not autohoming properly, the pinda never picks up the signal.
Not sure what else to do... I have taken a youtube of the autohome and was hoping the good folks here at the Prusa forums may be able to help.
Re: Calibration failed - check axes
Unlikely that your problem is the same as mine was, but something to try. I installed new PTFE into the Hot end, and got exactly that error message. Now Calibrate XYZ first in fact checks Z.
In case the problem was there , I loosened the screws holding the pieces holding the Z rods,at the top and those holding the Z steppers. (and I think also the trapezoidal nuts)I moved the X carriage down by hand until the nozzle touched the bed, tightened the lower screws, moved the X carriage to the top, and tightened the top screws. Then it worked!. 🙄
Retired doc, should have been an engineer.
Re: Calibration failed - check axes
Regrettably that didn't work, just tried this morning.
After more troubleshooting, I think the issue is that the XYZ calibration does not autohome in the same spot the actual autohome. For example XYZ starts with X in the 0 position. Autohome brings the X to 12. On the initial XYZ drop I assume that PINDA is looking for a signal and would throw an error if one isn't found.
I have no idea what to try to correct these issues.
Re: Calibration failed - check axes
Quick Update:
Managed to fix the check axes, I feel foolish as it was the black nuts installed backwards that has carried through my original build. I thought cause it was working before I shouldn't have changed, egg on my face.
Now I get failure on the third calibration point. Here is my pronterface log of the calibration run.
https://docs.google.com/document/d/1q4p2mwe8_iBBbMvv1fq9u_fLneV3TqCIOeI9o0BvGZc/edit?usp=sharing
Any thoughts from our more advanced users?
Re: Calibration failed - check axes
When I first set up my printer I was getting random failures during calibration and it turned out to be that I had the X axis belt tension way to tight. I loosened it up and it has been working like a champ ever since.
Re: Calibration failed - check axes
if this is on a new build try loosening the lowest two screws on the x carriage back plate. (the one with all the wires coming through it).