Brutstruder Geared Stepper Mount
Description
The OpenSCAD file contains references to the following STL files (used for the assembly view and reference only, no STL's are used in the actual construction of the stepper mount):
1. Gears from thingiverse.com/thing:5164
2. BrutStruder block and idler from thingiverse.com/thing:4036
3. Dino-2 L&R from thingiverse.com/thing:1912
Putting these STL's in the same folder as the OpenSCAD file will allow you to see the pieces in an assembled view (like the multi-colored image on the left).
UPDATE (02/07/11): Updated SCAD file, added 606 bearing STL's and single layer variants. My first print curled a bit at the corners, but was still usable. I tried adding some 'tabs' at the corners to increase the raft size (if used) and help hold down the corners. Just clip them off when done. They are untested, but should help, in theory ;-).
Instructions
You will need a 608 or 606 bearing to help support the big gear's shaft/bolt. The bolt is M6, so you'll need to shim it up to M8 if you use the 608 version. I used some kapton tape.
This is a large print (~87mm in Y), so be sure the platform is well centered when you start printing. If you use a raft, check the Skeinforge output to make sure it doesn't go beyond the build platform.
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Printed one this morning, and have it all assembled on the Brut (pictures later). Just need to work on the electronics side now.
My filament stripped about 80% through the print, but it printed enough that it was still useable. Looks like I can probably get rid of the 'bump' on the top. A single 7mm layer seems to fit perfectly (I was worried about gear heights, and potential collisions with the Dino's).
Cool!
Although you know you could use a 606 bearing? That way you wouldnt need to shim it.
Yeah, I could use a 606. The scad file is set up to optionally use a 606. I'll post up an STL with the 606 version exported later today.
I don't have any extra 606's, but I have a several 608's. I didn't want to pay $8+ to get one shipped to me, so I made it use a 608 by default. ;)
License
More from JadeKnight
I can attest that TheRuttmeister's new 51 and 7 tooth gears v1.1 (http://www.thingiverse.com/thi... work very well with this. I had a problem with the heat of my stepper motor softening the adapter plate (PLA). ABS may work better. I cut a crude version out of MDF and added a cooling fan. Just the fan may be sufficient, because it makes the motor cool enough to hold a finger to, rather than being too hot to touch.
Looks like its because you have such a small stepper... I'm running something thats close to the size of the standard cupcake motors and I can keep the current low enough (and still extrude at stupid speeds) that the motor never gets more than skin temperature.