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Posted by MetalHead on November 23, 2005, 6:40 pm
Please log in for more thread options steamer wrote:
> --I see where Vantec is now selling a servo that puts out
> 27ft-lb of torque, but it costs an arm and a leg. Has anyone got links
> to an equivalent device that's a little cheaper? Ideal would be plans
> for a homebrew widget..
> --TIA,
>
These guys http://www.roboteq.com sell a few different motor controllers
that show the use of a position feedback pot to run a closed loop
position servo. Their smallest controller handles up to 30 Amps at 24
volts and they go up to 140A at 24V I think. Put a good quality pot on
the output shaft of a windshield wiper motor and drive it with one of
these controllers and you should be able to get serious torque. The 30
Amp bare board version is $275 and they go up to the $500 neigborhood.
I don't have any connection with them, but their products look useful.
Good Luck,
Bob
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> --I see where Vantec is now selling a servo that puts out
> 27ft-lb of torque, but it costs an arm and a leg. Has anyone got links
> to an equivalent device that's a little cheaper? Ideal would be plans
> for a homebrew widget..