MMU NOT LOADING FILAMENT
Hi,
My MMU3 is not loading the filament. I can hear the motors turning and the idler lines up but the filament will not catch on even if the idler is tightened all the way. My MMU has worked before for the past three months and I don't know why it stopped working now! Please give me your thoughts.
ASPRINT
ASPRINT-(Proudly)MK4S MMU3 Owner
RE: MMU NOT LOADING FILAMENT
The idler MUST NOT be tightened all of the way
See Step 38 at this link - https://help.prusa3d.com/guide/6-pulley-body-assembly_328918
when loading you need to feed the filament into the MMU until it is grabbed by the pulley wheel... sometimes there is a bit of a restriction at the MMU End of the Feed PTFE Tubes. cutting the filament end on a slope usually helps get past this.
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: MMU NOT LOADING FILAMENT
Hi Joan,
My idler is tightened just like in the instructions and I even adjusted it a few times but still no luck.
ASPRINT
ASPRINT-(Proudly)MK4S MMU3 Owner
RE: MMU NOT LOADING FILAMENT
can you manually load the filaments to the front of the MMU3 (behind thefilament cutter section, with the idler cover open?) then close the idler cover, and try a print?
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: MMU NOT LOADING FILAMENT
I am.having same issue and when loading it is a loud sound while loading...none of the filaments 1 to 5 will load with filament up to mmu3 with filament cut at a slant
RE: MMU NOT LOADING FILAMENT
My wife was having the same problems. As a machinist and use to these type of problem, I look into the problems. #1 the tower had some small imperfections. I filed down the part of the chimney where the screw goes through the I/R circuit board and made it smooth. #2 I looked into the 90 degree corners opposite of were the wires go into the chimney and found filament poop. Cleaned that out. The I/R board then sat flat to the top of the chimney. #3 Insert a piece of filament into the extruder while tightening the screws to hold the tower in place. #4 Adjust the tension screw on the left side of the extruder until the it shows filament is loaded and give a quarter turn past that point. Remove the filament to see if it turns off. Insert the and remove the filament a few times to make sure the sensor is working properly. Adjust if necessary until working correct. Bottom line is that if the I/R sensor board is too high, the arm will not block all the I/R and give false readings.
RE: MMU NOT LOADING FILAMENT
I just recently had a print stop half way through the with the "FINDA didn't trigger #04101 (MMU)" error. After unloading the problematic filament back to the buffer cassette several times to ensure the filament was a) sharp, and b) straight, the Pulley Motor still chattered when the filament seemed to just be trying to enter the Selector.
On a hunch, I took the Festo fitting off of the Selector and used a spare piece of filament to see how deep it would go, and it stopped some distance before the depth of the selector. By grabbing the filament a short distance from the face of the selector and providing some force I ended up dislodging a broken off piece of filament that was apparently stuck in the entrance to the selector from the previous filament change. After that I was able to put the Festo fitting back on, feed the filament, and resume the print!
Before jamming filament in your Selector, I highly recommend holding it on the side to get a clear understanding of the length of filament needed to get from the face of the Selector to the front of the little PTFE tubes ... if you don't have a stuck piece of filament I could only imagine the troubles you'll cause yourself if you jam your filament too deep and sink/damage one of those x_X