Running a prit job without filament

[jbinion]

I have been trying running without filament to figure out how long a print job takes. Is there an easier way, or am I missing something in slic3r? We put a fan on the front of the printer, but we're still having some problems with the filament expanding in the tube. Seems like time to switch from abs.
jim

[tom10122]

I've had very little jams for the amount i printed with pla, I found that if you get the right temp then the fan is useless and makes jams more frequent.

[jbinion]

We have the hot end temp at 200-205c. What temp are you using?
jim

[johnoly99]

Try lowering your temps jbinion. PLA usually doesn't require near as much heat as ABS does, the lower temp you can get away with extruding at, the less heat-creep up in the hot-end you will have, which equals less jamming. I'd still try focusing the fans airflow directly at the upper section of the barrel, that usually does it.