MK8 extruder feed issue

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Posts: 10
Joined: Sun Jan 04, 2015 3:16 am

MK8 extruder feed issue

Post by paulwhy » Sat Feb 07, 2015 8:25 am

MK8 issue.png
MK8 issue.png (166.96 KiB) Viewed 9683 times
I have a Prusa I3 Mendel Reprap from Geetech built from kit, with 1 extruder, .4 mm oriface and 1.75 PLA and ABS filament.
I am have trouble with the filament feed, see the attached photo. The filament will not load correctly, it misses the hole in the threaded rod after going through the pinch rollers. I have to remove the fan and heat sink to load the filament, and sometimes when it retracts it wont go back in the threaded rod and the stepper grinds. I have the same trouble with both PLA and ABS filament.
Shouldn't there be a chamfer or countersink on the hole in the threaded rod so it feeds into the hole better? or am I missing a piece to guide the filament into this hole?
Sorry if this question has already been asked, but when I try to search on 'extruder' in this forum it says it is too common a word and will not search.

Posts: 28
Joined: Fri Feb 06, 2015 1:43 pm

Re: MK8 extruder feed issue

Post by harry_chen » Mon Feb 09, 2015 4:31 pm

Hi paulwhy
In fact there is a chamfer:
MK8.jpg (33.87 KiB) Viewed 9679 times
Maybe you should "Align your extruder",here is the guide: ... w_Problems
I hope it can help you.

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