by fma » Wed May 07, 2014 10:48 am
Hi!
I'm designing a direct-drive extruder for 1,75mm filament, for a friend, and we have some issues. First, I have to say that I'm using such extruder for more that 1 year with success, but I only used ABS so far. Our problems are with PLA...
What happens is after some time, the filament is not pushed anymore. This happens when there is some retract. And I don't know if it is because we don't push enough on the idler, of if we push toot much! The gear is a MK7 from reprap.me. The notch is not very deep; could someone send a picture of a filament which as been pushed through such MK7 direct drive gear?
Thanks for your help.
Frédéric