INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

gerabox ration and torque selection

gerabox ration and torque selection

(OP)
I am sending one jpg file for TurnTable design.
In this file upper design is Topview of 2 x2 feet fabricated box.
down side design is side view of Turntable.

I have to put 250 kg to 1000kg toad on turntable and turn it 360 degree.
I require 250 kg. thrust load ( axial load) capacity gearbox,but should be compact and low weight.
same as other turntable up to 500 kg and 1000 kg. for three types of efferent load capacity.
We will use stepper motor for run this Gearbox.

Tell e in Nm and Kg

Pl. call me if any question.

RE: gerabox ration and torque selection

Ring....ring...

Hello, I'm calling to let you know that there is no .jpg file linked to your OP. I also want to let you know that it would be very helpful if you provided a more detailed description of your design problem.

Thank you and goodbye.....

RE: gerabox ration and torque selection

(OP)
There is a posting file ( attach) problem, so i ca not upload a jpg image file

RE: gerabox ration and torque selection

(OP)

RE: gerabox ration and torque selection

The ratio of the gearbox will depend on the mass properties of your supported load, and the rate at which you wish to rotate the load 360deg. The torque capacity of the gearbox should consider the peak dynamic forces seen from starting and braking the rotating load. If your drive motor has a stall torque of 8.5N-m, then that would be the limit for input torque. The output torque of the gearbox would be the drive ratio minus mechanical losses in the system.

There will also be a load reversal on the gears when you transition from driving the load to stopping the load, due to backlash in the gear meshes, assuming of course that your drive motor has some sort of braking ability. This dynamic loading on the gear teeth should be accounted for when sizing the gearbox.

If the mass center of the supported load is offset laterally from the gearbox output shaft center, then you need to account for some moment force on the gearbox output shaft bearing in addition to the axial force.

RE: gerabox ration and torque selection

tbuelna - Ring....ring... That's very funny. Approaching Knock, knock funny.

The OP is still missing including a lot of information one would expect, like desired output rpm; desired rate of acceleration, power available at the motor. Very underspecified. I would also consider placing the turntable on it's own wheels like a lazy susan so the gearbox is entirely free of thrust and over turning moment loads.

In view of the last part, how is the 1000kg mass (not a load, really) reduced to a 250 kg mass (also not a load) at the gear box?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close