Makerbot Replicator 2 cant print for some odd reason

[Feliks87]

you won't believe what happened to me today

after printing for almost 10h yesterday I returned to my Rep2X today with a new job and it messed it all up
it must have somehow clogged over night because it wasn't able to feed the filament correctly

after several tries of load/unloading the filament I decided to clean the whole extruder head
guess what I found, this looks a lot like your filament (it's ABS btw from NuNus)
clearly visable "bite marks" from the stepper motor on the filament


I then disassembled the feeding mechanism and it was all crammed with filament debris from the unsuccessful feeding tries
but after cleaning up this mess it still couldn't feed the filament (because of the clogging I guess?)


the problem here is obvious right? bad filament
wrong... I loaded the very same filament into my left extruder head and printed right away without any problems (for several hours now)

so it seems to me that there is a problem with the feeding mechanism itself but what could it be?
I guess you have checked your feeding mechanism already CADstudent?