Wristband Wheel by CodeCreations

Tools Parts

Wristband Wheel

CodeCreations

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Published on May 4, 2012

Derived from

Highly Configurable Wheel (One Wheel To Rule Them All)

by CodeCreations

Description

This is a robot wheel made to fit one of those "cause of the week" wrist bands, and generated with the Highly Configurable Wheel (One Wheel To Rule Them All) at thingiverse.com/thing:21486. Credit for the idea of using one of those wristbands (which I think was a fantastic idea and seems to provide excellent traction) goes to AUGuru. I just tweaked some of the settings and printed it.

Unfortunately, I forgot to hit Ctrl-S before I closed down OpenSCAD after exporting the STL, so I don't know exactly what settings I used, but the wheel diameter measures 68mm and I used a 6-spoke diamond pattern with concavity and the "slots" option for tread. It was modeled for a 4mm motor shaft and a 3mm set screw.

The print quality here is not very good, and I think I'll have to use an M2.5 because I can't drill out the set screw hole, but other than that the tire holds very well and the traction is excellent.

Instructions

1) Print.
2) Stretch wristband around wheel as a tire.
3) Install on robot.
4) Run for your life because one-wheeled robots can be pretty mean.

You can tweak the size and design by modifying the original OpenSCAD file.

This one is quite rigid and string, using 3.38m of 3mm filament with 2 perimeters, 2 solid layers, and 20% honeycomb infill.

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puzzler300 on July 18, 2012 said:

this is actually very ingenious and use ful. A+ to you sir!

AUGuru on May 7, 2012 said:

Forgot to set up a Follow on the first reply, nd never have figured out how to add one without leaving a comment...

CodeCreations on May 7, 2012 said:

The wristband was about 2mm thick, so I used the "slots" tread option with a depth of 0.8mm IIRC -- I figured that would be about half the height once it was stretched on. Unfortunately I forgot to save the settings after I exported the stl. :/ It's extremely sturdy, though -- I could probably stand on it.

I also wanted to try one with 2-3 slots (2-3 bands per wheel) for a fatter wheel and better traction, along the lines of a sumo. I have had this "mostly wheel" design in mind for years, and it would be fun to see how it translates into something real.

The wristbands themselves came in a packet
of seven for about $5, and it included three sets of matching colors. I'll have to check out McMaster, too.

AUGuru on May 7, 2012 said:

Very cool! What tire settings did you use to make a rim to hold the bracelet on? I'm glad to hear it makes a good tire. There are probably some good sources of silicone tubing of different diameter we can find as well. I've seen the bracelets as wide at 1". McMaster lsits a lot of silicone tubing in various ID's as well.