View previous topic :: View next topic |
Author |
Message |
Ttelmah Guest
|
|
Posted: Wed Mar 28, 2007 2:40 pm |
|
|
One other thought. Have a PWM drive to the power drives, and turn this down to a very low percentage when stationary. This will give a small current, and a little 'hold' torque to prevent accidental movement.
Best Wishes |
|
|
quium
Joined: 19 Jan 2007 Posts: 27
|
|
Posted: Thu Mar 29, 2007 10:18 am |
|
|
Hi
Is there any site or books from which I can do my mathematical calculation to find out the required torque for my application. |
|
|
Greg Richter Guest
|
Overly polite |
Posted: Fri Feb 15, 2008 12:56 pm |
|
|
This design is a mis-application of a stepper where a worm drive is needed, or at the very least a geared motor. How to compute torque? Wikepedia? Dictionary? Anyplace?
I'm astounded by the politeness of the working engineers on this forum who are being asked to redesign ill-conceived hobby projects.
Buy a book, maybe? Civil Engineer's Handbook is a good one, Mark's is good, although any high school physics text has the answer for you ... |
|
|
SherpaDoug
Joined: 07 Sep 2003 Posts: 1640 Location: Cape Cod Mass USA
|
|
Posted: Fri Feb 15, 2008 1:47 pm |
|
|
We save our hostility for our bosses who actually pay us money to give them grief. _________________ The search for better is endless. Instead simply find very good and get the job done. |
|
|
crystal_lattice
Joined: 13 Jun 2006 Posts: 164
|
sharing of knowledge |
Posted: Sat Feb 16, 2008 5:12 am |
|
|
I agree with SherpaDoug and besides why are you commenting on such an old post??
If you have knowledge on a particular topic then share it, if you don't want to share it then at least keep quiet!! Not everybody on this forum is qualified in all aspects of engineering and that is why they ask people on this forum.
Yes you can go and read a book on a topic, but it sometimes helps to ask a professional a question and get a concise answer rather spend days researching a topic.
Only people whom feel "threatened" or "insecure" do not share what they have learnt/ know!! |
|
|
|