XYZ Calibration failed. Bed calibration point was not found.
I purchased a Prusa MK2/S printer about a year ago, and received the MMU last December. I recently had an issue with a PETG print sticking to the bed so much that it pulled some of the PEI sheet with it when it came loose. For awhile, I simply tried to print around the bad area on the bed, but something else started malfunctioning and I couldn't get the nozzle get close enough to the bed to stick the first layer.
I've been following the instructions https://shop.prusa3d.com/forum/assembly-and-first-prints-troubleshooting-f78/-before-you-ask-troubleshooting-video-updated--t472.html#p39190 to set the z height. I've run it dozens of times from when I first got the printer, through upgrading to multi material and multiple nozzle changes. The first layer calibration would run ok, but was also running through the bad area on the bed. Even with the first layer calibration running, when I went to print something real, the nozzle wouldn't get close to the bed and the filament wouldn't stick. I tried doing live z adjust on my prints and it didn't seem to change the position of the nozzle. I finally decided to replace the PEI so I could start with a fresh surface. Unfortunately I have trouble double or triple the cost of parts from Prusa due to shipping and purchased a Gizmo Dorks PEI sheet. It turned out to be 1mm thick, more like a sheet of plexiglass than the film I peeled up.
After replacing the PEI, I can't get the XYZ calibration to work. The first time I ran it, it got through the first 4 points, then when it went to do the 9 point test, it drug the paper on point 3. I adjusted the height of the PINDA sensor, even to the point where it was barely .1mm higher than the nozzle, but nothing made it get past point 3. Prusa agreed that there was an issue with the PINDA sensor. That seemed logical considering I was having problems before the PEI was replaced.
However, my newly received PINDA can't get past point 1 of 4. Most recently, I set the height of the PINDA sensor to .65mm higher than the nozzle (I measured several index cards with a calipers, put the nozzle against the bed and set the height of the PINDA using the cards.) The XYZ calibration drags the paper, but it didn't look like it was going to dig into the bed, so I let it continue. I took video of the process
The previous PINDA was able to read the calibration points, but this one cannot get past the first one. Any suggestions on what might be wrong?
Re: XYZ Calibration failed. Bed calibration point was not found.
I have the same exact issue, but with point 4 of 9. Problem is that the heat bed is not perfectly flat, its quite wavy, which necessitates the need for Z bed leveling and using a Pinda probe to begin with. Really, it's a bunch of complication to make up for a bad design that is sold to you as a feature.
I bought the Mk2.5 upgrade kit knowing full well that the new heat bed and table would fix my issue, only to be slapped across the face having to print my own upgrade parts!!!!! How am I supposed to fix my printer if I need the printer to work? I too adjusted the Pinda probe height with no effect. Perhaps there is a brake in the wire, that at a certain position, it opens the circuit? Will check for that now.
Re: XYZ Calibration failed. Bed calibration point was not found.
Ok, problem fixed. Took the probe from the 2.5 kit, and also my uprights shifted slightly, working like a charm now. Truth be told, the original probe is probably fine.
RE: XYZ Calibration failed. Bed calibration point was not found.
@ Stephan
How did you eventually solve the problem? I am experiencing the same things right now.