Turntable with fast stop and run frequency

Robotics and electronics discussion Mechanical design and actuators
1

I want to build a turntable with a 40 to 50cm diameter (ca. 15-20 inch), and a load of about 1 - 2 kg.

The table should make 360° in 1 Sec. Not in a continuous rotation, but with 25 ‚stop an goes‘. Each stop should be at least 30ms (x25). So the motor should turn the 360° in 250ms, or each 14.4° in 10ms.

I’ve tried a setup with arduino, big easy driver and a stepper with planetary gear. The specs for the motor are 904 rpm, but I only managed to run the 14.4° in 30ms. Besides the whole thing is really noisy and vibrates and jumps a lot, obviously because of the fast stop and go and the centrifugal forces.

Does anyone have a suggestion, what motor to use: a stepper or would a brushless motor or servo be a better option? What driver would I need?

Thanks!

2

You need to understand the mechanical requirements (torque, speed and power) before you (or we) can decide on a motor and driver.

3

Hello.

What Jim said is correct. You might find this blog post on Force and Torque helpful.

- Grant