How do they do this? Any idea?

[ERMEGM]

Would something like this work or along these lines?

[circuitpro]

Well, it sure does the same thing, just on a different scale! Good find!! The Youtube guy isn't taking temperature into consideration of course, but he does have speed control and everything else. With the optical feedback and strong enough motors, you should be able to get the job done.

[rsocor01]

Would something like this work or along these lines?

Nice project that you found there.

Robert

[HankMcSpank]

Would something like this work or along these lines?

That was very innovative.

Actually, a pickup winder was my first targetted PIC project. I used an old cooling fan as the main motor (printed an encoder pattern, then stuck that to a CD, which in turn was stuck to the fan motor) & I used an old dot matrix printer's stepper motor as the traversal motor.....it worked surprisingly well, but you really need floating point as you end up dealing in a lot of fractions to get the traversal going accurately enough.

Speaking of traversal, that was the weak pount of the guy's solution in that video - terrible resolution (as the traversal changes direction, you've got the diameter of that large hole the wire is threaded through introducing large amount of innacuracy).

I'd recommend a helix type traversal solution along these lines (which is what I used)....



Simpler too.

Knowing what i know now...I'd strongly recommend just using two stepper motors... one reasonably powerful one for the main turning motor and a smaller one for traversal. It makes accuracy a whole lot easier. (& is much less time consuming trying to get none dedicated bits & bobs to work in an enviroment they were never intended for)

PS Oh btw I'd imagine that after 6 years, the OP has probably found a solution by now!

[peu]

maybe you can get ideas here: http://machsupport.com/forum/index.php/topic,50.0.html