Corbin's Treehouse - Corbin Dunn, Santa Cruz, CA
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Archive for February, 2016

LED Cyr Wheel v3: Notes…on inserts

Okay! I discovered that 1.240” for an insert is too thick. I had to do several passes with a sanding disk to take them down a bit. I’d say 1.230 is more close to the accurate value; or maybe 1.235”. Somewhere around there. 

The inserts are now all done, and drilled and tapped. I made nice jig for it (Pictures coming soon). I did a quick test spin in it, and this wheel’s inner diameter is my height + 3” + 3/16”x2 (for the tubing thickness), and it feels a bit big. But I’m used to spinning ons smaller wheels, and the skin will make it ?” smaller. 

IMG 6003

Also, a note to myself: when cutting the wheel, it is better to cut one of the 5 pieces accurately, and then use it as a base measurement for cutting all the others. I used tape all around and marked spots, which introduces rounding errors, and slight differences with the cutting blade thickness.

LED Cyr Wheel v3: “rolling” the wheel

Fresh rolled wheel:

IMG 5942


Marking off the circumference with a flexible tape measure:

IMG 5943

After cutting it into a 5 piece wheel:

IMG 5944

Some of the curves where a little under-bent, so I rolled a few through the bender again to get them aligned a little more to the template.

Turning the 3/16” sidewall steel inserts (1.25” OD) down a bit. I went to 1.240”. I’ll see how well that works tomorrow…

IMG 5953


.. the ’40 ford is watching me.



LED Cyr Wheel v3: “Making Donuts”

“Making Donuts” is Bill Roberts, a “Cyr Smith” [term coined by Jesse], says when rolling cyr wheels.  So, I’m “making donuts” right now for my next wheel.

This started by fixing up my harbor Freight rolling bender (it was already moved with the SWAG offload touch ups). The center bearing died when i last used it — too much pressure and rolling too quickly.  I also worked harder at aligning everything, and bolted it down outside:

IMG 5886\\\

These pictures are more for me to just remember what I did:

IMG 5888

IMG 5892

IMG 5893

LED Cyr Wheel v3: boards arrived

My boards arrived from OSH Park today. This will combine all the necessary cool stuff:

IMG 5861


A few days ago I got my new LEDs (144 per meter). A month or so ago I ordered some more at 60 per meter, and decided to step it up for this next wheel! I got them direct from China via aliexpress.

IMG 5860

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