UP Mini extruder gear cooling mod

[Jeeplvr]

Very nice. Be sure to post the Thingiverse link when they are uploaded.

done!!
http://www.thingiverse.com/thing:300335

[Jeeplvr]

Since the modifications I have printed a number of models and all seems to be better. My stepper is slightly cooler. I tried to print the print board sized model and got 2/3 of the way complete (6hrs of print time) before the filament jammed. Before I could only get it to print this model for about 3 hrs before jamming.

[Jeeplvr]

I waited to post this one. I have been printing almost non stop for 24 hrs. and not one jam. I removed the small brass filament guide tube from the heating element and opened up the entrance with a small centering drill. If you don't know what a centering drill is, it is a tapered drill bit for use on a lathe to drill a tapered hole in the end of a shaft for the lathe centering support mechanism. The entrance of the brass guide is the point where the filament jams every time on my machine. With the centering drill I basically increased the chamfer diameter and depth of the original chamfer. The combination of the plastic mods and increased chamfer has , for now, solved the problem of filament jamming.