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Thingiview of 7T.smallgear.v.1.1.non-CC.stl

Thingiview of Coloso-compatible.8T.small.gear.stl

Improved Stepper Upgrade for Mk5!

Created by
TheRuttmeister
Created on Jan 26, 2011
Derived from Stepper Upgrade for MK5 Makerbot Plastruder by TheRuttmeister

Now with COLOSO-Gears!(tm).

An improved version of my prior design.

The Adapter Plate was just revised (to v1.2) the gearing was completely redesigned (which involved drawing the involute curves the hard way, which gave far better results).

Gears are 51 and 7 tooth respectively. Giving a ratio of 7.2857:1.
The gears are also oversized (COLOSO-Gears!(tm)). I will be uploading a slimmed down version in the near future, I just wanted to be sure I had a large enough meshing area.

Note that the new adapter plate is very wide, 90mm+ and will only just fit on the cupcake platform. I recomend printing a z-rider to get a larger build area!

Also, the 51 tooth gear is kinda massive. You might have issues printing it from ABS. As always, I recomend PLA.

The 7 tooth gear is TINY. Sorry. It will be a pain to get to print right. I broke mine trying to remove it from the build platform. Had to epoxy it back together.

UPDATE:
Added 14 tooth pinions sized for nema17 and 23 (5mm and 1/4" shafts).

Added an 8 tooth pinion (obsolete files gone, but 7 tooth gear left up for the brave).
I recomend that you print the small gears with 0 extra shells (infill of 0.1 or higher will result in solid teeth).

9 Tooth gear is off for now unless someone really really needs it

Here is a video of it running (and reversing thanks to SF35!)
flickr.com/photos/45928876@N02/5405071895/

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adapterplatev1.2.stl

1 mb / 323 downloads / 1 year ago

51T.biggear.v1.stl

6 mb / 226 downloads / 1 year ago

7T.smallgear.v.1.stl

3 mb / 191 downloads / 1 year ago

51T.biggear.v1.1.stl

5 mb / 286 downloads / 1 year ago

7T.smallgear.v....stl

2 mb / 222 downloads / 1 year ago

Coloso-compatib...stl

3 mb / 228 downloads / 1 year ago

14T.Small.gear....stl

3 mb / 225 downloads / 1 year ago

14T.Small.gear....stl

3 mb / 161 downloads / 1 year ago

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Improved Stepper Upgrade for Mk5! by TheRuttmeister is licensed under the Attribution - Non-Commercial - Creative Commons license.

© 2011 by TheRuttmeister

Instructions

Print:
Adapter plate, 51 tooth gear v1.1, small gear either 7,8 or 14 tooth.

Assemble.
You might need as many as 4 washers to space the big gear away from the extruder body.

I might make a chew-ube vid to show the assembly if people really need it.

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Improved Stepper Upgrade for Mk5!

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