Looking for a 12VDC motor with low RPM

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In summary, the conversation discusses the need for a motor that can drive a colorwheel in a robot at a low speed and with minimal noise. Various suggestions are given, such as using a gear motor, a plastic gearbox, a stepper motor, or a servo motor. It is also suggested to try adding oatmeal to the gearbox or using a motor from a car window or a computer printer. The conversation concludes with a note on avoiding stiction by using a low frequency to drive the motor.
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I'm looking for a motor that will drive a colorwheel inside a robot. All of the 12v/DC motors I have discovered so far have significantly higher RPMs (3000+) than I require. I would prefer something that runs quietly between 3 and 10 RPM. I looked online and found a few gear motors to try, but the noise is similar to a power screwdriver going on high. There is a lot of transmission noise that cannot be muffled.
I decided to ask a question here because I am a complete electronics novice. I'm unsure of the possibilities available or whether such a motor even exists.
 
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  • #2
Low torque ? Perhaps a plastic gearbox, or a stepper motor...
 
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  • #3
What the heck, you already have a motor/gerabox you can't use, so try adding some oatmeal to the gear box. (dry, uncooked oatmeal)

If size is not a problem, a motor/gearbox that operates the windows in a car.

Or a servo motor as used in model airplanes or boats.
 
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A motor from a computer printer is quiet in operation. Alternatively, a cassette motor is very quiet and reliable. You can make a motor turn slowly by driving it with a square wave having a mark space ratio which differs slightly from 50%. Use a low frequency, such as 25 Hz, so the motor armature is shaken slightly, as this avoids stiction.
 
  • #5
Unfortunately, a connection between the OP and a spammer was found, so I'll close this thread now. Great responses by you folks to the question! :smile:
 

FAQ: Looking for a 12VDC motor with low RPM

What is the typical RPM range for a low RPM 12VDC motor?

Low RPM 12VDC motors typically have an RPM range between 1 and 300 RPM, depending on the specific application and design of the motor.

What factors should I consider when selecting a low RPM 12VDC motor?

When selecting a low RPM 12VDC motor, consider factors such as torque requirements, power consumption, size constraints, noise levels, and the type of load the motor will drive. It's also important to consider the duty cycle and the environment in which the motor will operate.

How can I control the speed of a 12VDC motor?

The speed of a 12VDC motor can be controlled using Pulse Width Modulation (PWM) controllers, variable resistors, or electronic speed controllers (ESCs). PWM is often preferred for its efficiency and precise control over motor speed.

What are the common applications for low RPM 12VDC motors?

Low RPM 12VDC motors are commonly used in applications such as robotics, conveyor systems, automated machinery, medical devices, and hobby projects where precise, slow-speed movement is required.

Where can I purchase a low RPM 12VDC motor?

Low RPM 12VDC motors can be purchased from various sources including online retailers such as Amazon, eBay, and specialized electronics stores like Digi-Key, Mouser, and SparkFun. Additionally, local electronics shops and motor manufacturers may offer suitable options.

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