Strange x/y issue before a print
I really don't know how to best describe this, but starting yesterday after a couple of months of solid printing, whenever I start a print it will do the calibration for the bed and then the print head will bump the frame twice and the bed will adjust itself on the y axis twice and then I get a "crash detected" on the LCD and the cycle starts over again. If I leave it alone, it'll do it maybe one more cycle and then strangely just start printing fine. Zero issues on the print, some running up to 4 hours.
This printer was pre-assembled at Prusa so I don't know the ins-and-outs of it too well but am open to any suggestions as to what could be causing this. I did a factory reset but the problem still persists. Is there a thread on updating the firmware anywhere? Not sure if that's needed...
Thanks in advance!
RE: Strange x/y issue before a print
Updated the firmware and while it does bump twice on each axis, albeit in a different place, it prints first time without a crash detection. Weird!
RE: Strange x/y issue before a print
Aaaaand now I'm getting x axis shifting in prints. Great.
RE: Strange x/y issue before a print
Back up a bit.
Power off and check each axis for bearing binding. X and Y should move smoothly both directions.
RE: Strange x/y issue before a print
Mine did the same thing last night except I haven't tried to update the firmware (I believe I have the latest anyway). This was after running four 24 hour prints. The printer appeared to have done a factory reset because the setup wizard comes up after a reboot. I began the setup routine and this is now on my display....
Any ideas would be great. I have restarted the printer 3 times.
RE: Strange x/y issue before a print
I actually got on support chat with Prusa last night until 1:30am, sending videos and photos in so they could help me try to diagnose it. At the end of it they said it sounds like bad bearings and I'd need to send it in for repair (this was a prusa pre-assembled printer since I'm not very mechanically inclined), which would take 3-5 weeks. There is some resistance on the x axis toward the right side of the frame (if the control panel is in front of you) This printer was purchased on 12-08-19, so it's really pretty ridiculous that I'm having to send it in for repair almost a month after buying it. I'm going to RMA it for a refund and weigh my options from there and potentially consider resin. Pretty down about this.
RE: Strange x/y issue before a print
@jesse-1
which firmware is installed? In 3.8.1 there exits a bug. After there happens a kill (M112) signal, whatever the reason may be, the printer hangs with showing strange characters on the LCD screen. Only reset helps. It's also possible that you have electrostatic problems.
Factory reset is not good. I would try to reflash firmware. If you have problems with Flashing i would contact Prusa Chat over eshop. Maybe there exits a hardwareproblem.
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.
RE: Strange x/y issue before a print
That really stinks! I bought mine pre-assembled on 11/18. If I have to return it I will buy a second one to use in the interim. I enjoy this too much now!
I am skipping the setup wizard now and everything appears ok so far. Getting ready to do live z layer calibration.
RE: Strange x/y issue before a print
@jesse-1
Flashing the firmware is pretty easy, Jesse. It's done from inside of PrusaSlicer and you can download the needed firmware file from the support section of prusa3d.com.
I flashed the firmware on mine and reloaded 3.8.1.
RE: Strange x/y issue before a print
@karl-herbert
Thanks for the imput Karl. It is 3.8.1-2869 firmware. I was able to skip the setup wizard and successfully complete the calibration steps. I'm now printing a calibration square to fine tune live adjust z.
RE: Strange x/y issue before a print
After successfully calibrating everything and printing a perfect calibration square I tried a simple print. It was going fine until it was about 5mm from bed. The printer went nuts and started printing off the right side of the bed.
Now I'm back to where I was last night. I'm going to try to reflash the firmware as @karl-herbert suggested. I think I'm also going to try to print without Octoprint and see if that's contributing.
RE: Strange x/y issue before a print
Issue resolved. I needed to lubricate both the x and y axis. I did it at 100 print hours, but I'm slightly over 200 now. This was resolved by Steve in a chat session. He also said that the strange characters in the display was not an issue. A restart will clear it up.
Thanks to all for your help!
RE: Strange x/y issue before a print
Note that lubricating the rails is not lubricating the bearings. Make sure you pack the bearings.
And don't tighten the bearing holders too much. That will also cause binding.
RE: Strange x/y issue before a print
@jesse-1
"This was resolved by Steve in a chat session. He also said that the strange characters in the display was not an issue. A restart will clear it up"
3.8.1 issue 2348 (kill/M112 command), see here: https://github.com/prusa3d/Prusa-Firmware/pull/2348/commits/e7f2577233100a32abf050d1ba77492e9b3a1a91
should be solved in 3.9.0
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.