Prometheus Fusion Perfection

Here are the pieces for the coil winder, partially assembled.

you can see the grain of the rapid prototype: 

Already I can tell the bobbin is not well supported axially. I doubt it will be able to keep tension with 12 gauge wire. But we can test thinner wire on this iteration. 

Putting it together:

As expected, the axel needed reinforcement:

Doing some quick checks. The stepper motors are supposed to take exactly 400 steps to complete a revolution. However, when I program the bobbin to take 400 steps forward then 400 steps backward, it appears to come just short of a full revolution! WTF! It looks like it’s closer to 415 steps per revolution. But I can’t trust that number to be accurate over many revolutions.

I’m learning RAD, a gem for controlling the arduino from ruby. Very cool.