In a nutshell, I can move the Y-axis toward the front of the machine, but not back. The z-axis will not move up or down at all now. I’m using Cura 14.09, which has been working fine for months, barring that the machine detects z-home too low about 25% of the time, causing the nozzle to dig into my kapton tape or blue painter’s tape - but that hasn’t stopped anything from working before.
Here’s what led up to it, perhaps something will give someone a clue as to what might be wrong…
- ABS spool ran out of filament during a print job late last night. Remaining 2-3" of filament was still in the machine from the nozzle up to just below the gear that pushes filament down (nothing unusual there).
- I put a new spool of ABS on the spool holder and went to heat up the hot end to pull out the 2-3" piece. Cura was still up, so I set the temperature to 242° C and waited for it to go up. It moved up very, very slowly. Around 160° C, I noticed that while it usually goes up about 6-7° per jump, it was only going up 1° per jump this time. I was able to pull out the 2-3" piece with needle nose pliers fine.
- Temp was still going up far slower than usual, so I closed Cura, brought it back up, put in a small object, and brought the printer control up again. This time it griped that the printer was a max temp, though it didn’t show a high temp. I closed Cura and turned off the Lulzbot Mini. Restarted it after 15 seconds, waited a bit, and restarted Cura, then went back into printer control.
- Now it showed the correct temp, and I was able to set the temp. I kicked off a print job, but it didn’t move up/down or front/back during the homing process, and then started printing up in the air (the print head happened to be up near the top of the machine).
- I stopped the print job and restarted the PC and the Lulzbot Mini. Went back into Cura and the printer control. Tried to move the print head around, and discovered that it will no longer move up or down, and will not move back (but will move the print bed forward up until I hit the very front). I lifted the machine and cleaned out some garbage filament that had dropped in there. Found some stringy filament caught in the cable up by the front that controls the forward/back. I removed that, but it still won’t move back (again, it does move the print bed forward, though).
Seems strange for so many weird things to hit at once, almost as if it was a circuit board issue rather than a gear or cable.
I’ve unplugged the machine and will check every gear I can find to see if anything is amiss, but thought I’d check on the boards before running off on a wild hunt.
Any thoughts or suggestions?