I have an application that needs two motors rotating at the same speed in opposing directions, the speed needs to be low and the holding torque fairly high. The target speed would be in the 0-10RPM range, I don’t need microprocessor control, a simple control pot to provide a constant/adjustable speed will do. The motors would need to run continuously for about 8 hours daily.
I have some bipolar steppers and an A4988 Pololu on hand from a 3D Printer project that I thought I might use, two steppers wired in parallel with the windings reversed on one. I thought perhaps I could use a 555 timer circuit to control the speed.
The question is, am I barking up the right tree here? Can I expect to run a pair of NEMA17 steppers for 8hrs daily at such low speeds with an A4988? Is this low speed range even attainable? Is there an existing controller or a kit I can buy to get this done? If not, does anyone have a circuit they could suggest I use?..
Any advice would be greatly appreciated, Thanks!