Electronics > Beginners

Need advice on designing a stepper motor application that can be commercialized

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SL4P:
My question is more fundamental.
What’s the fixation with a stepper?
A properly controlled DC motor on an h-bridge will be infinitely quieter, more controllable, draw less power overall, and smoother when implementing a ‘pendulum’ motion effect.

Mechatrommer:

--- Quote from: engineheat on July 15, 2018, 01:36:11 am ---Quantity? 10000 to 20000 hopefully

--- End quote ---
good luck!

engineheat:

--- Quote from: SL4P on July 15, 2018, 04:00:01 am ---My question is more fundamental.
What’s the fixation with a stepper?
A properly controlled DC motor on an h-bridge will be infinitely quieter, more controllable, draw less power overall, and smoother when implementing a ‘pendulum’ motion effect.

--- End quote ---

You are right. The stepper is not necessary. It's just that I've found a quiet one that suits my need.

My previous experience with DC motors tell me they are loud. The ones I've had experience are the following type:
But then again, they are cheap, hobby types and spins at thousands of rpm. It' s hard to be quiet at that speed. To get it slow enough I need, I thought about using a gearbox which would add to the noise.

I have not tried using H bridge. I heard you can use PWM to slow it down but the speed I need are so slow (like a cassette player), I'm not sure if I can electronically control it to be that slow without a gearbox. Please advise. Thanks

Mechatrommer:

--- Quote from: engineheat on July 15, 2018, 04:59:20 pm ---My previous experience with DC motors tell me they are loud...
at that speed. To get it slow enough I need, I thought about using a gearbox which would add to the noise.

--- End quote ---
if you can control the power by PWM to the required speed, you'll get alot quieter motor and no gearbox required.

james_s:
With the right motor you could directly drive a pendulum, controlling the current so the motor is not spinning a full revolution, just applying torque to the pendulum. Stepper motors are great when you want precise absolute position control but it doesn't sound like you need that here.

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