User talk:GreenEllipsis/MMU2S

This content only covers the MMU2S. If you have an earlier version of the MMU, consider upgrading to the MMU2S.

Remedying Printing Problems

Strings on Filament Tips

• Prusa: increase cooling moves. Decrease nozzle temperature.
• Klathmon: Too long of strings? Jams going IN to the nozzle? Decrease temps, increase unload speed at start to 120, decrease cooling moves to 1 (multiple cooling moves tends to create long lumpy strings for me). [1]
• Try 0Calvins settings

Recovering from MMU2S Errors during Printing

LEDS:

* _ _ _ _ Filament 1 load error
_ * _ _ _ Filament 2 load error
_ _ * _ _ Filament 3 load error
_ _ _ * _ Filament 4 load error
_ _ _ _ * Filament 5 load error

*  *  *  *  *   Selector or filament(?) motor overcurrent detected

Wrong filament loaded

1. Press CHANGE FILAMENT from the i3 menu. The filament will unload.
2. Press the RIGHT or LEFT buttons on the MMU to move the selector to the correct filament.
3. Press the MIDDLE button to load the filament.
4. Press the knob on the i3 to load the filament to the nozzle and resume printing.

MMU2S Modifications

Extruder

• more sensitive IR filament sensor

PTFE Tube Assembly

Generally, modifications involve increasing the inner diameter of the filament path and chamfering various locations.

• FESTOS or pneumatic couplers
  • Flav1u_ drilled his to 2.5 mm.
  • GreenEllipsis drilled his to 7/64 inches.
• PTFE tube diameter
  • replacing the stock PTFE tube with a tube that his the same 4 mm outer diameter, but a 3 mm inner diameter.

Selector

• Button for MMU2S reset button
• Captive screw covers for idler tension screws
• Labels for left, right and middle buttons

Filament Buffer

• Gravity assist

Firmware

• Dribbling
• Skinny Dipping
• https://github.com/TheZeroBeast/TZB-MMU2S-Firmware/releases

Additional References =

https://help.prusa3d.com/en/article/mmu-loading-failed_2135 https://help.prusa3d.com/en/article/mmu-needs-user-attention_2139