Printer randomly goes 0, 0 and back to printing while prining.
Hi.
Yesterday I finished building my MK3S+ kit (This is my second MK3). I calibrated it, added sock, PID tuned etc.
It prints just perfectly (no ringing [I greased bearings so I guess it helped]). I added heatsings to all stepper motors to keep them cool (which works super great).
I noticed now, while printing the dog included on the SD card that it went to X:0, Y:0 randomly during print and went back to printing without any failure. I also noticed the same while printing small custom print, it happened once after 2nd layer.
Firmware: 3.9.3.3556
For dog I used file included on SD.
My print, I sliced with Prusa Version 2.3.0+win64
In attachments, I include gcode files.
Why is my printer going to 0,0 while printing and then continuing like nothing happened?
RE: Printer randomly goes 0, 0 and back to printing while prining.
And here is the dog gcode.
RE: Printer randomly goes 0, 0 and back to printing while prining.
You need to zip any files and attach the compressed archive to a message here.
and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan
RE: Printer randomly goes 0, 0 and back to printing while prining.
Just to confirm: You are NOT using OctoPrint, correct?
and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan
RE: Printer randomly goes 0, 0 and back to printing while prining.
@hooch
What do the Fail Stats say?
Cheerio,
RE: Printer randomly goes 0, 0 and back to printing while prining.
Turn off crash detection. See if that helps.
RE: Printer randomly goes 0, 0 and back to printing while prining.
Statistics shown that it crashed at Y axis. No idea what caused it.
RE: Printer randomly goes 0, 0 and back to printing while prining.
Y axis moves very smooth. Belt tension seems ok (260). Prints came out excellent quality. Steppers are cold (I 2-3 40x40x11 radiators to all of them.
RE: Printer randomly goes 0, 0 and back to printing while prining.
Its false crash detections and I and quite a few others have reported this since installing the 3.9.1 firmware.
It absolutely plagues long prints with big perimeters and trashes what would have otherwise been a flawless print.
Its been raised on the firmware GitHub with no response from the developers. I cannot see anything in the later firmware release notes that say it's been resolved.
Disabling crash detection stops the issue, but is an unacceptable workaround because, when a REAL crash happens; the printer will just smash through it and keep going. This could easily end in severe damage to the printer.
RE: Printer randomly goes 0, 0 and back to printing while prining.
Among the common causes of Y axis 'false' crashes are: (in easy-to-check order)
Objects or wiring obstructing the path.
Debris clogging the Y idler pulley - but you haven't created much debris yet.
Y idler not straight or bearing failing (often due uneven pressure/friction when not straight.)
Damaged or wrongly installed Y belt, inc wrong tension.
Dirty Y axis smooth rods.
Y drive pulley loose or wrongly installed - inc grub screw misaligned.
Y axis smooth bearings distorted by overtight U bolts.
Y axis smooth bearings failing due clumsy installation.
Internal bearing in Y axis stepper failing.
Cheerio,
RE: Printer randomly goes 0, 0 and back to printing while prining.
Even when all the mechanical parts work well and no obstructions while printing, I got y-crash detection on both my MK3S machines. Gave up finding the cause and disabled the crash detection.
I am sure it happened along the way of upgrading to 3.9.1. No failed prints after disabling crash detection.
It would be nice to have a way to lower the sensitivity of crash detection on y-axis, as this is the only one I have problems with.
Have a look at my models on Printables.com 😉
RE: Printer randomly goes 0, 0 and back to printing while prining.
Even when all the mechanical parts work well and no obstructions while printing, I got y-crash detection on both my MK3S machines. Gave up finding the cause and disabled the crash detection.
I am sure it happened along the way of upgrading to 3.9.1. No failed prints after disabling crash detection.
It would be nice to have a way to lower the sensitivity of crash detection on y-axis, as this is the only one I have problems with.
Agree 100%.
No mechanical issues at all and only started after upgrading the 3.9.1
RE: Printer randomly goes 0, 0 and back to printing while prining.
Does the problem go away by reverting back to an earlier version?
RE: Printer randomly goes 0, 0 and back to printing while prining.
Haven't tried to revert back to an earlier version.
For now I live with the disabled crash-detection, but it is far from optimal.
In the Prusa M-code list, there is: M916 - Set TMC2130 Stallguard sensitivity threshold
It looks like this can be used to control sensitivity for stall and crash detection, but I have no idea on how to use it...
Have a look at my models on Printables.com 😉
RE: Printer randomly goes 0, 0 and back to printing while prining.
Y axis crashes for no reason, seems not to be a new problem. I found this thread: Y-Axis fake(?) Crash detections - let's debug from 2018.
Have a look at my models on Printables.com 😉
RE: Printer randomly goes 0, 0 and back to printing while prining.
Does the problem go away by reverting back to an earlier version?
Yes. Going to older firmware version elimintatates this issue 100%. I just finished 7h print with 0 crashes. On current firmware version, same print crashed 6 times.
RE: Printer randomly goes 0, 0 and back to printing while prining.
@hooch
Which version doesn't have the problem?
RE: Printer randomly goes 0, 0 and back to printing while prining.
3.8
RE: Printer randomly goes 0, 0 and back to printing while prining.
Here is link to GitHub Issue: https://github.com/prusa3d/Prusa-Firmware/issues/2939
Looks like there are more people with this issues. And interesting note by one of them. It doesn't crash when using OctoPrint.