Calibration failure following PTFE tube blockage
I built this MK3-S about 9 months ago and its been printing fine until a couple of days ago when I experienced my first PTFE tube blockage following a filament unload I found I could not reload new filament due to a blockage about 15mm above the nozzle, I tried to all sorts to clear it but failed so I striped down the hot end and manage to remove the blockage, refitted it all back together and decided to do a re calibration and that where it went wrong.
I started the calibration wizard passed all the tests inc the XYZ calibration without the steel sheet it then askes to fit the steel sheet and proceed, I fit the sheet and carry on, the printer then drives the nozzle hard down into the sheet and keeps driving until reset or it trips out, iv'e checked the super pinder sensor and its setting using the recommended cable tie method but still no luck, any thoughts anyone.
RE: Calibration failure following PTFE tube blockage
Ensure your PINDA is set to the correct height. It sound like it is to high. Should be about the width of a tie wrap above the tip of the print nozzle.
RE: Calibration failure following PTFE tube blockage
Hi this was the first thing I checked having built it from a kit, I used the cable tie as before and it’s at the correct height and I’ve checked it’s working and it’s fine.
RE: Calibration failure following PTFE tube blockage
Argh. I forgot that since it is passing the XYZ calibration, the SuperPINDA has to be working, since it measures a metal target in the heat plate. What could be happening is there is an intermittent connection in the cable when you get to the calibration point where it drives into the bed. Move the print head to that point and use the motor controls to raise and lower the head to see if the probe is read at that point. If it isn't being read, then wiggle the cables to see if it is intermittent.
Have you checked to see if the connector has worked loose on the EINSY board? Others have reported to check the connectors from time to time.