Motor Design
Motor Design
(OP)
I am trying to design the components of a mechanism that will allow me to precisely rotate a vertical, axial load. The motor and its components will need to support an axial load of 125 lbs, and be able to rotate (in both directions) in increments of about one-tenth of a degree. The shaft is made of steel and about three inches in diameter. I have considered connecting the shaft to the base using some type of bearings, to support the load and eliminate friction, and then connect a stepper motor to the shaft underneath the bearings. I don't have any experience with this type of thing so if anyone has any ideas or suggestions I would greatly appreciate it. Thanks.





RE: Motor Design
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
RE: Motor Design
RE: Motor Design
Companies like Camco-Ferguson, Sumitomo, CDS, Rotomation and many others have a plethora of fully-developed commercial products to rotate things precisely.
RE: Motor Design
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
RE: Motor Design
I´d use a Geneva wheel, with the suitable gear train. When loads are small, it´s precise enough to be used in movie projectors.
RE: Motor Design
RE: Motor Design
If you want to position with this accuracy you need a resolution of 3600. Among other reasons, this rules out geneva wheel.
I think your main question is "how do I size a motor?"
http://www.as-automation.com/cheat_pre_reg.html
This should answer all you need to know about torque.
Second is control. If you have a load inertia that is wildly above the motor inertia you are going to have trouble controlling your movements.
Read:
http://www
Once you get the loading figured out, picking a bearing should be easy.