Print shifts 3 inches to the right halfway through
I just updated OctoPrint and my MK3S firmware to the most recent version. I started printing something like this https://images.app.goo.gl/cDiGL9HNBdEQygwMA and the first time it clogged or something and just stopped printing (Filamentum ABS @ 240F, Slicer preset, .10mm) about halfway up. The gear had jammed and the filament broke inside. I attributed this to low heat, moisture, or too fine layer height and upped the temperature to 245F on the second print as well as using .20mm layer height.
This time it did something strange at the same point but imagine it getting halfway through then the next layer started 3 inches to the right. Of course no supports so it was stringy and I wasn't watching it all 8 hours, but once enough mess got under it you could see it was continuing as expected and printing the rest of the model fine. It was up to where it was laying down even layers and starting to look good, just way off to the right. I thought maybe my gcode file was messed up since it happened twice but since I'd changed layer size and exported it was a new file. Plus this doesn't seem like some setting issue, the whole thing started at a different x axis halfway through.
RE: Print shifts 3 inches to the right halfway through
Shifts are one of two or three things: the nozzle hits the part and stalls a stepper (adhesion to bed and warp related). The bearings seize and stall a stepper (lack of lubrication or too much force on the bearing housing). Loose belt or belt drive gear. Oh and a glitch in the communications between an app and the printer (like OctoPrint running on a slower PiZero).
RE: Print shifts 3 inches to the right halfway through
- I can certainly understand adhesion and things like that but this is a perfect print up to the point it misfed before and now is shifting. That would lead me to believe something non- mechanical is going on. If it's software related I'd like to know what's going on there.
RE: Print shifts 3 inches to the right halfway through
I don't look at images that aren't posted to the forum - so no idea what you are seeing; but, a shift that happens that is electrical, aka non-mechanical, is exceptionally rare and not repeatable. Shifts that happen same time same place are 1: a bad file (identical shift); or 2: a hardware snag.
ps: unless there is a broken wiring in a harness, but those are only common in a moving bundle: and no axis motor cables move. So a skip from that is generally ruled out.
RE: Print shifts 3 inches to the right halfway through
Do you think it would be from the original stl file or something I could remedy in the Slicer? If it happened at a different point I'd consider lubrication and that sort of stuff but it just doesn't seem like it. I'll try and print something else and see where that gets me, then maybe try this one again or use a different stl file altogether. Thank you for your help, I'll let you know.