So, I met a guy the other day that want's to make a musical string winding machine. A string winding machine basically spins a piece of music wire so that the operator can wind a thicker wire around it for the lower strings. The trick is that both ends of the wire must be spun at the same time for the thing to work right. Traditionally the ends are synchronized with a shaft. This gentleman had an idea to use steppers at both ends to maintain synchronization.
What I'm thinking is that something like that could be driven by a very simple controller, perhaps even just a pulse generator except for the acceleration at the beginning and end. This controller would also need the ability to control speed (perhaps with just a knob).
Anyone have any ideas on a simple way to handle something like this.
Idea one was to come up with something for an Arduino controller but, I haven't programmed an embedded device in about 17 years and it might be just absolute overkill but, it would be very easy to implement an acceleration phase for the stepper.
Second idea was to use something like a 555 chip to create the pulse signal and slap something on the input side to create a ramp up, perhaps even just an RC type of things to smooth things out. Perhaps one of these: 555 stepper pulse generator
I just haven't done anything like this for years and don't know if the 555 can go fast enough. I'm thinking this machine will have a speed of about 1000rpm or as much as we can get out of it.
Anyone else have any thoughts on how to go about this?