Printing multimaterial, one toolhead does not heat up!
Hello,
I'm so tired of this XL!
The new "joke" is, that I can't use the multitool feature anymore. It worked months before without problems!
I'm trying to print a model in PETG in tool 3 with PLA support interfaces in tool 1. There is no hardware issue, tool 1 reaches easily the temperature to load and unload PLA. I tried soluble and non-soluble interfaces.
But when starting the print job (using wipe tower or not), tool 1 does not heat up to 230 °C before printing, but keeps the idle temperature of 70°C. The effect is, that the filament can't be extruded and the print fails. Even the first priming at the border of the print bed fails for tool 1.
I tried both the latest two Prusa Slicer versions and the latest two firmware versions (6.2.4 and 6.2.2).
Looking into the generated gcode, it looks correct - tool 1 seems to have the command to heat up to 230°C before printing, so Prusa Slicer shouldn't be the guilty one.
Now, I'm printing it completely with one tool head - like I would do with a 300€ china printer. Ummm, let me think...
Has anyone an idea? Maybe it relates to the problems of other recent posts with PETG/PLA printing problems?
~Zwacki
RE: Printing multimaterial, one toolhead does not heat up!
Sorry, this belongs into category "Hardware, firmware and software help"...,
RE: Printing multimaterial, one toolhead does not heat up!
So, with help of the patient Prusa support team (thanks to Andres and Nelson!), this issue was solved after many hours.
First, I was misleaded by the nozzle temperature overview. You have to navigate to the info page and watch the live values to see the real temperatures and indeed, the tool 1 temperature was correct. Nevertheless, the filament stuck. After choosing another tool head for PLA interfaces: The same problem.
The Prusa guys came to the conclusion, that is was an hardware issue oder Slicer misconfiguration, which I could not really believe.
Printing the pre-sliced Prusa keychain with 2 colours, the second filament printed ugly, stringy and much higher than the other layers, but it printed.
This time I believed the support team and started a complete tool offset calibration. After this, all prints were OK again, including my initial failing print. The offsets have changed over time, even without changing nozzles. If a miscalibrated nozzle was too low over the heatbed or another layer, the filament was blocked and the error occured.
RE: Printing multimaterial, one toolhead does not heat up!
Maybe check to see if your nozzles are tight. Maybe that could explain the offset changing.
I recently saw where someone's nozzle fell out because the retaining screw was loose.
Don't crank them down, because that will crush the tube, but they shouldn't be loose.
RE: Printing multimaterial, one toolhead does not heat up!
Yes, thanks for the hint - now I have learned to check the tool heads regularly and I will be alerted if a filament fails to load, because the former filament had a much higher melting point. This might result in a small nozzle shift...
~Zwacki