Printer Jam

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ggeezer
Posts: 12
Joined: Thu Sep 12, 2013 2:19 am

Re: Printer Jam

Post by ggeezer » Tue Jun 24, 2014 6:05 pm

To make cheap filament, processors will use a lot of, if not all, regrind (recycled) resin.This resin has gone through one or more heat cycles which can degrade the material to the point where some of it will not melt any more. Poor extruder maintenance along with bad system setups often import contaminating materials like dust, fines, etc. Using too large an extruder will result in a long residence time which often leads to material degradation.
We occasionally have nozzle plugs on our injection molding machines when running regrind, and the nozzles are .125" diameter not .020".
It is best to go with filament extruded from virgin resin.

ggeezer
Posts: 12
Joined: Thu Sep 12, 2013 2:19 am

Re: Printer Jam

Post by ggeezer » Thu Jun 26, 2014 9:22 pm

There is another feed problem that often crops up. My low-cost Afinia filament is often "jumble" wound onto the reel. Instead of being level-wound so that it feeds smoothly off the reel, it is often criss-cross wound in an unorganized manner so that the filament gets snared by overlying layers and knots up, stopping the feed. The feed gear on the motor either stops and you hear the motor misstepping or the gear carves a notch in the filament.
I usually unroll the cheap filament and re-roll it to make sure that this doesn't happen during the print. This is a big pain in the a** to say the least.

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