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3mm to 1.75mm filament converter

by daveseff, published

3mm to 1.75mm filament converter by daveseff Apr 10, 2013

Description

I love my new extruder on my SteelBug (https://solar1.net/drupal/Steel_Bug). But I have dozens of 3mm filament in various colors. This machine was built to convert (re-extrude) my 3mm fil to a 1.75mm fil.

The bottom spool in this picture is an existing roll and was just placed there for demo purposes.

Recent Comments

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I think it would be better to use plastic granulat to this
Does this work?
Maybe we need a unit like this with three extruders .. two for different source materials that extrudes ~1.75mm/2 to feed a third that outputs the final 1.75mm diameter? Create your own colors, or mix materials of different properties?

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Instructions

This was made from 1" square steel tubing from the hardware store. this could easily be constructed with aluminium extrusion but steel tubing is cheap, and I weld. The extruder is mounted on 1/4" steel plate welded to the tubing.

The extruder is from an old printer and is controled by some old Thingomatic electronics. Basically set you temp based on abs/PLA in replicatorG and manually extrude for a long time.

TODO::
My receiving spool may need a stepper driver to wind up the output. That will have to be for a future date. For now I just babysit the machine.

Maybe we need a unit like this with three extruders .. two for different source materials that extrudes ~1.75mm/2 to feed a third that outputs the final 1.75mm diameter? Create your own colors, or mix materials of different properties?
I think it would be better to use plastic granulat to this
It's fairly accurate. I've machined the nozzle a .070 and there are no burrs. I suppose I could run it with a few passes, but my printer is quite forgiving. Once in a while I get an air bubble but that is usually right at the start so I just cut that off.
How precise is your output?
I wonder if you were to run the same filament through several times if you could decrease the variance in filament diameter.
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