Problem with my printer Nozzle Cleaning >< Crash detection
Hello,
I'm having a problem with my pre-assembled Prusa Core One. Every time I start a new print, the printer gets stuck in a loop of crash detection and nozzle cleaning failures.
I don’t know what else to do — I’ve already tried every step from the official nozzle cleaning guide. I’ve also attached a video showing the “nozzle cleaning fail.” At the end of the video, I included two photos of the nozzle and the build plate.
Can you help me ? :'(
RE: Problem with my printer Nozzle Cleaning >< Crash detection
There’s quite a few comments on this forum about the same issue. I definitely have the same issue and have not been able to resolve it yet. Hoping Prusa gets back on this soon:
- https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4773
- https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/crash-detected-6/
RE: Problem with my printer Nozzle Cleaning >< Crash detection
It’s weird, I had this issue and started a thread about it, but it happened less and less often and now I never get the problem, it must be at least 2 months since it occurred.
I still get nozzle cleaning failed every now and again, but it’s nearly always when I have crap stuck to the nozzle and with PETG.
RE: Problem with my printer Nozzle Cleaning >< Crash detection
I actually swapped the start G-Code and started 3 prints without any problem.
RE: Problem with my printer Nozzle Cleaning >< Crash detection
I've also had endless problems in the Z axis, both on initial homing ( I got around that problem by Tuning the Nozzle Temperature to zero right at the start of the print), and then later when nozzle cleaning. It seems that there is a problem with the loadcell if the nozzle is heating, it can produce false results and lead to crash detection, etc, even if a crash hasn't actually occurred.
I've been experimenting with adding the following line to the Start G-code:
M104 S0
I initially added that before the first homing:
M84 E ; turn off E motor ; Insert here to disable heating before homing M104 S0 ; disable hotend heating for initial homing G28 ; home all without mesh bed level
This worked very well, no more need to reduce nozzle temp at the start of a print.
I then tried adding the same line just before the nozzle cleaning command:
M84 E ; turn off E motor M104 S0 G29 P9 X208 Y-2.5 W32 H4
I've tested this several times and the printer homes and starts without any issues, print quality is good.
I should mention that I'm not an expert! Comments gratefully received 😊
RE: Problem with my printer Nozzle Cleaning >< Crash detection
I chatted with tech support and after a few hours of troubleshooting they sent me some replacement parts. I replaced the heatsink / loadcell this did not fix the problem, but replacing the main cable fixed the problem.