adastra wrote:
>
> Perhaps more detail is necessary to accurately illustrate the problem:
>
> The motor is "geared down" considerably so that the output of the gearbox
> runs slower, but has more torque.  Attached to this gearbox output is a
> "pinon" gear which in turn drives a "rack" gear, thereby translating the
> rotary motion to a linear motion. The idea is to generate a precise force at
> the end of the linearly-moving rack.  A calibrated load cell monitors the
> force, and when it has reached a prescribed level, the motor is turned off
> (by a PIC.)
>
> Everything works fine, EXCEPT:  With the crude ON/OFF control of the motor,


Maybe not as accurate as you need, but when the value is reached you may
be able to remove power to the motor and then short the windings as
well, thereby stopping the motor quite fast.

--
Best regards

Tony

mICros
http://www.bubblesoftonline.com
mailto:sales@bubblesoftonline.com

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