I don’t know much about motors and am looking for a DC or AC motor for a project that does the following:
- has a normal motor mode (ability to control direction and speed of rotation)
- is able to switch into a free swivel/coast mode with low friction
The motor is for a simple mechanism that allows a pendulum (a rigid rod) to be remotely “swung” up to some angle (perhaps with Arduino) through a motor locking itself to the swivel point, then released (i.e. “unlocked”), allowing gravity to take over and the pendulum to swing freely. I imagine there would need to be some ball bearing involved to reduce the rotational friction in the unlocked state.
Any and all help is greatly appreciated. I do have a bit of a budget for this project so cost isn’t a huge deal.
Thanks so much!
As opposed to a particular kind of motor, it sounds like you just need a controllable clutch that you can add into your system. Unfortunately though, I do not have any suggestions for where you might find that.
Alternatively, you might be able to achieve what you want using a stepper motor along with a driver or controller
that you can use to deneergize the motor, allowing the rotor to spin freely. Going that route would simplify your mechanical setup, though I would expect the stepper motor rotor to add more rotational inertia to your pendulum than the clutch mechanism when the clutch is disengaged.
Do all Pololu stepper motors spin freely with low friction when not powered (i.e. there is no electromagnetic brake)?
Our stepper motors do not have electromagnetic brakes.