I am looking for advice on which type of motor to use in my project. Here are my requirements:
- Variable speed via potentiometer
- Low speed… around 1 - 60rpm; most common usage would probably be 5 - 20 rpm
- High torque
- Ability to implement a start / stop toggle switch; preferably this could default to the “stopped” state on power-up
- Full speed (or close to it) at press of the start button, i.e., it doesn’t have to “ramp up” to rpm set by pot
I’m afraid I don’t have specific figures for torque, but the motor will turn a group of four interlocked 6" diameter, 1" thick Baltic BIrch plywood gears, if that helps.
From what I have read, it sounds like a stepper motor may be the best choice, but hopefully someone can make some specific recommendations. If at all possible, I would like to avoid using a microcontroller or motor driver; I know this is possible with a stepper motor, but I don’t know it’s feasible. For example, could I limit the maximum rpm without a microcontroller? Or implement a start / stop?
If I do need a microcontroller and / or motor driver, could you please make recommends about what would work well with my project? Or perhaps there is another motor that would work better?
Thank you so much for your input!