## Forum Archive - Deprecated Link to Active Engineering Forum

Forum Moderators: Marky, Administrator |

Home | Engineering Design Data | Engineering News | Engineering Calculators |
Confusion calculating electric motor size
##### Mechanical Engineering Forum
 Posted by: powerwagon78 ® 07/06/2010, 11:56:41 Author Profile eMail author Edit Hi all,I am having some confusing issues on a project I am working on, and found this site and hope that some of you can help me with this. I am considering using a stepper motor (need precise starts and stops) to spin a thin metal disk, but I need to make sure that I pick the correct size motor. The shaft of the motor will point upward, with the disk being parallel to the ground, and a collared bearing around the upper end where the disk meets the shaft. Here's my questions:1. If I am not overly concerned with the acceleration this spins at, do I just simply need a motor with enough torque to overcome static friction? 2. It would seem I would still need to worry about inertial forces in regards to getting it started spinning as well, but I wanted to make sure? 3. I know that torque is T=rF, but again if I am not concerned with the acceleration, how do I calculate the force (F)? I know the mass of it, and the radius of the disk I want to spin. Thanks guys, if there are any more questions just ask. I really appreciate it a lot.Jeremy

 Post Reply Tell a Friend (must be logged in) Alert Admin About Post Previous |   |

© Copyright 2000 - 2022, by Engineers Edge, LLC All rights reserved.  Disclaimer