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Nema14 with 1.75mm filament - Kuehling-Wades Extruder

by PlanoRepRap, published

Nema14 with 1.75mm filament - Kuehling-Wades Extruder by PlanoRepRap Jun 13, 2012

Description

The perfect mate for a NEMA 14 Wallace printer. A nema 14 version of the Greg's Wade reloaded - Guidler, Tilt Screws, Fishbone Gears. Set to 1.75mm filament, grovemount for makergear hot end, and uses the fishbone Gears from
was:http://www.thingiverse.com/thing:7993 correction:http://www.thingiverse.com/thing:18379

Inspired by Xendi in the Wallace thread.

Recent Comments

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It is a very high torque for a nema14!
The 40oz/in gets very hot, perhaps you can find a high torque 50 oz/in that would run cooler?
Which oz/in motor do you suggest?

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Instructions

print tested with 0.24 layer height.
1.75mm filament
9/47 fishbone gears
grovemount for Makergear hot end with 50mm

Use 2 long M4 screws with washer-spring-washer and they will snap on and off the idler without much problem. I had a 1" spring that I cut in half and it works great.

The motor runs just a bit hotter than I like but you can touch it without getting burned at printing speeds of 30, 60, and 65 it skipped steps above that while pulling on a 2kg reel of filament so I run it at 60 for now.

If you re-render from Source you will need to fix the .stl with netfabb before you skein and print it.
Ok, this little extruder has been running off an on for a good while on the all Nema14 Reprap Wallice I designed it for. But the Nema14 motor I have is barely able to keep up with faster printing speeds and gets very hot. If I adjust down the amperage so it isn't too hot to touch it then looses steps anytime the filament snags or has to pull hard from a heavy spool. Next time I would go with a higher oz/in motor.
On the bright side the prints it produces are very good quality.
Which oz/in motor do you suggest?
The 40oz/in gets very hot, perhaps you can find a high torque 50 oz/in that would run cooler?
It is a very high torque for a nema14!
I made this with the gears from the linked extruder without looking too closely, and found they didn't fit at all.  If I had paid attention I'd have noticed they weren't fishbone gears at all, whoops.  The correct link to the one with fishbone gears is thingiverse.com/thing:18379
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