Help with MMU2 on MK2.5
I have had no luck so far with printing with the MMU2 3.5 , MK2.5 1.2 both have the latest software , still jams and just keeps running with no filament coming out (going through the motions ) .. I have change the settings in Slicer and rammings as suggested. Put a new Extruder to make sure that not the issue .. Running Hatchbox (all new) PLa 196-205 . I did the Bic pen Mod .. Calibrated Bowdens Tubes .. Nothing works (getting a final Print) .. I tried running samples MMU2 objects for MMU2 nope .. stops ..
Filament Settings:
Extruder First Layer: 215
Other Layers: 196-205
Loading speed at the start: 19
Loading speed: 22
Unloading speed at the start: 140
Speed of the first cooling move: 2.2
Speed of the last cooling move: 3.4
Ramming/total ramming time: 4 sec
There are a few key things for me that made a difference. (from another MMU owner Tips)
1. I did the pen spring mod link below, but I used different screws as in the picture attached. I cut the screws down to have minimal thread so they would lock in and also not hit the pinda plus they have a smooth shaft.
2. make sure the MMU drive gears are centred on each filament.
3. use a long piece of filament and feed it through the whole length of each ptfe path all the way to the extruder and feel for any resistance along the way, if you feel any correct that. I found it useful to use a piece of filament that had been unloaded as that has a tip on it that is slightly wider so will show up where the issues are.
4. make sure the tips on the unloaded filament are good if you get stringing or too long spikes then its not going to work. I used the Prusament settings in slicer as a good starting point, I also changed my ptfe tube from the mmu to the extruded for clear tube instead of the orange tube and I can see the tips as they unload, makes it easier to see.
Thank you
Re: Help with MMU2 on MK2.5
I guess this one for revolver. Try to position it by yourself while loading fillament.
University: MK2S upgraded to MK3 with MMU2.0
Home: MK3
Materials: ABS; ASA; PETG; PET; PLA; Nylon; Nylon Carbon; CPE;
SW: Freecad 0.18; Slicer PE And still generating more troubles than whole forum together.
Re: Help with MMU2 on MK2.5
Still no luck as of yet , still making it to the first layer change and stop working .. I really think to solve this problem would be a cutter ( cut either before or after each change) This would solve my problem 100% .. I will like to try ZeroBeast , but as usual it not made for MK2.5 .. Day 44 no luck yet ..
Re: Help with MMU2 on MK2.5
Did you try to comunicate with prusa lab via online chat? Try that...
University: MK2S upgraded to MK3 with MMU2.0
Home: MK3
Materials: ABS; ASA; PETG; PET; PLA; Nylon; Nylon Carbon; CPE;
SW: Freecad 0.18; Slicer PE And still generating more troubles than whole forum together.
Re: Help with MMU2 on MK2.5
As I mentioned in another thread, replacing the heat break in my MK2.5 with the Prusa MK3/MMU one in their store finally allowed me to print for hours. I still haven't been able to print a finished object, but at least my problem is no longer tip thickness.
Re: Help with MMU2 on MK2.5
Are you still running the stock Power Supply, which has a 100% load rating of 240W?
I have personally found that even a Mean Well RSP-320-12 (320 W) still runs beyond 100% load occasionally with both heaters running, on my Mk2.5 (no MMU2.0). I would expect a MK2.5 with MMU2.0 to be even more loaded with tree extra motors.
If nothing else, overloading the power supply every time you start a print will surely reduce its Time Before Failure. At worst, things may be happening, or not happening, because there isn't enough power available.
I monitor the output from the power supplies on my MK2.5 and MK3 with MMU2.0 using "DC 100A digital LED power meter monitor" purchased from Ebay.
I used this Thingiverse project at https://www.thingiverse.com/thing:2271173 as the basis for my PSU cover/monitor.
Cheers,Dave Jackson"Enthralled Nooby (not so much maybe, ~58 years old)... If 3d printers had been around 40 years ago... "