By demand, I busted the camera out again today.
This is how the motors are positioned, and how the chain wraps:
When I did the welding, I had just drilled a 1/8th hole down deep into the thumb that I use for my filler rod feed when TIG welding. This is the most critical part to have good dexterity in to make good TIG welds... So, I ended up just welding some of the difficult inside areas with the spool-gun. It makes a fine weld if you set it up and dial everything in correctly, but it leaves nasty splatter on your project. I started grinding off the splatter to clean up the project, and then OOPS! I ground a spot in my finger in a place that caused it to squirt a little stream of blood when my heart beat. Same hand that I drilled the thumb of yesterday...
But, I decided it was just a flesh wound, and continued working. Here is a happy thumbs up for you guys, with a hint of what my bracket looks like in the background
Then the blood running into the grinder motor shocked the piss out of me, almost literally. So I decided I needed to do something about the blood.
So, a few drops of superglue later, and some bandaids also super glued in place, and I was back to good-as-new.
I drilled the sprockets and mounted set screws in them, and drilled dimples in the shaft that align with the set screw hole when fully tight. It will all be loc-tite'd on final assembly.
So, here is my cooling solution for the motors:
This one for the bottom,
This one for the top,
With a delta-T in a range that is safe for the motors, these CPU heatsink/fan assemblys can reject over 1KW of heat each continously. Motors get thermal epoxied and tightly bolted to the aluminum plate, and the sinks get thermal epoxied and tightly bolted to the plate about an inch away. Those motors aren't going to be able to get hot.
Superglue is so awesome. It's like having a miricle heal you in 30 seconds. Run a drill deep into your thumb, superglue it closed, POOF! healed. Grind into an artery that wont stop bleeding, wash it up and squeeze enugh super glue into it and it's healed. Super glue and blood actually cure very well together and make "super-scabs".
You can see it's not bolted into place in this picture, just loosely resting on the bike, but this gives you a rough idea of what the bracket will look like in place.
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