| 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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