So, first post...
I've had my MMU2 for a few months now and have exactly 2 successful prints. I've done every single thing I can think of and I still can't get it to work. Can anybody please help me?
Here's what I've done:
replaced all ptfe tubes with 2.5/4 ptfe
flashed to latest firmware for both the mk3 and the mmu2
Modified the Festo on the hot-end to the pass-through variety. (from thread in this forum)
downgraded the firmware on the mmu2 because of a post I saw here.
modified all of the spool holders to this design (https://www.thingiverse.com/thing:3113520
replaced the hot-end in it's entirety
Done the length calibration for all 5 spools about a billion times.
tried every slic3r setting I can think of
My tips look fine (maybe just a bit fat, but I can't seem to find a setting to thin them out)
I'm getting very little to no stringing.
My problem is that the filament seems to get jammed on load somewhere in the hot-end anytime after the first unload cycle of any color. I can hear it start to click and then eventually a flat spot gets ground in the filament.
I'm use 3d Solutech PLA and my settings are
Loading Speed at the start: 19
Loading Speed: 22
Unloading speed at the start: 140
Unloading speed: 90
Filament load time: 12
Filament unload time: 11
Delay after unloading: 0
Number of cooling moves: 3
Speed of the first cooling move: 20
Speed of the last cooling move: 20
Minimal purge on wipe towers: 15
Total Ramming Time: 2.50
Ramming Line Width: 120
Ramming Line Spacing: 110
Extra Loading Distance: -6
I've tried to print the included mmu2 prints as they were, and then have tried multiple simple and hard models I've slice myself, all with 0 success.
Please is there anybody out there willing to help me out? I'm at my wits end.
P.S. Sorry if in wrong spot, first post and all...