stabilizing metal tubes in multiplexor
I've 2 good prints and many failures. Finally took multiplexor apart as 1 of the 4 filaments would grind trying to enter the tube at some point during the print.
It has happened to all 4 extruders at one time or another.
With couplers and bowden tubes attached I ran filament up and down and sure enough you could hear the tube moving up and down and eventually the filament would hang up on the edge of the tube as it tried to enter. The filament may go in and out of the multiplexor without problem 3, 4, 5 times and then the filament hangs up on an edge.
It seems as though the hole for the metal tube is too deep for the tube?
I'm stumped and don't know what to try next.
Is this a good question?