Not enough pressure on idler to move filament
My idler housing broke and the filament sensor died I replaced it with an PC printed part and a new sensor. It might not have printed totally right, it seemed maybe like it as 'squished' in the vertical axis and it high-centers just slightly on a flat surface. I put it all together, and if I press hard on the idler carrier, I can get 1, 4, 5 to feed, but not 2 or 3. It seems that the idlers aren't coming into consistent contact with the filament.
I really don't want to reprint - and reassemble everything. Getting the bearings and pins is not a trivial exercise. Plus, the MMU WAS NOT built to be taken apart and serviced. The idler holder and idler need complete replacement.
I though that maybe shaving down the contact area where the idler holder comes into contact with the selector frame, that might allow the idlers to go lower?
Any other way to get the idler bearings and 'hobbed bolt' closer together??
RE: Not enough pressure on idler to move filament
So, no project is ever really done until you use a dremel tool... I shaved down the points where the spindle holder and the frame meet so that there is the spindle will be able to sit lower. I think the slight bend and maybe 'sagging' of the PC spindle I printed made things worse. but my old one seemed to have the same issue. I can get all of them to load and unload to the nozzle now. I think the springs should be a bit longer.
Yet to do a print, but what I have noticed is that while my tips a bit bulbulous and thick, they seem to move well- until it's time to eject the filament, and then it is getting caught up. I think the small guide between the selector and the spindle is too tight.
For all the other tubing/areas, I've gone with much larger tubing and fitings, but this seems to be the literal choke point now.
I think I'll ream those out or print slightly bigger holes for when and if I reprint the spindle. All depends on if this works and how well the XL handles multi materials.