Thread: BACKDRIVE PLEASE HELP!!!!!
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Unread 23-06-2002, 21:58
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#0047 (ChiefDelphi)
  
Join Date: May 2001
Location: Pontiac, MI
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Dynamic Braking has limits...
Posted by Joe Johnson.   [PICTURE: SAME | NEW | HELP]


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

Posted on 2/22/2000 3:50 PM MST


In Reply to: Re: BACKDRIVE PLEASE HELP!!!!! posted by Nate Smith on 2/22/2000 2:59 PM MST:



Dynamic Braking has it limits.

You basically have four choices:

1) more ratio

2) less efficient drive mechanism (worm drive, lead screw, etc.)

3) an 'over center' mechanism (i.e. in the 'hanging' position, the mechanism tend to rotate the motor TOWARD engagement not away -- think of it as a piston with a crank that goes 10 degrees or so beyond top dead center and hits a dead stop. No matter how hard you push on the piston, the crank is not going to backdrive).

4) a brake of some kind. This is not that hard or weighty. You can use a sevro to drive a catch into some chain links or into the cogs of the sprockets or (be careful) in the teeth of a gear.

I hope this helps.

Joe J.

P.S. I didn't get this message until after the ship time. Sorry if it is too late.


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