Do you offer a motor that can rotate a small mass by one revolution every hour?
Hi Cesar,
If you need 360 degree rotation, consider 3x Tamiya Planetary Gear Box. The motor’s rpm without geardown is 8000 to 10000 revolutions per minute (depending on input voltage and load). You need a motor that will spin at 0.01667 revolutions per minute, meaning you will need a 540,000:1 gear down. To achieve this, you would need to use 2x 400:1 and one 4:1 gear down. You would need to test this last ratio, and try to reduce internal friction as much as possible.
For reference, a servo motor can only rotate 180 degrees. If your application need to move only 180 degrees, there are 2000 distinct positions available (between 500 and 2500us pulse). There are 3600 seconds in an hour. You would need to move to a new location every 1.8 seconds (your program could increment the position and it would be farily easy to code). This is obviously not continuous motion, but played back, it may seem fairly continuous.
Hope this helps,
I cannot find the motor stated above, is there another solution for 1 rotation per hour?
@GPetropoulos Unfortunately the Tamiya Planeary gearbox seems to have been discontinued. There are still some low RPM spur gear motors:
https://www.robotshop.com/en/spur-gearmotors.html
Ex: https://www.robotshop.com/en/12v-2rpm-1497oz-in-gearmotor.html
https://www.robotshop.com/en/12v-4rpm-992oz-in-gearmotor.html
You can further reduce the speed to 1rpm using a DC motor controller. Keep in mind with a load, the rpm will naturally be lower than the “no load” rpm.