On Wed, 2 Mar 2011 21:41:45 -0600, you wrote:

>
>Jon, this is a ACME type screw that moves the knee, not a ballscrew. It is
>100% self locking.

Replace the servo with a stepper. There are also stepper drives
available that will drop the current supplied by half when no steps
received for some time.

Steve Blackmore
--

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