Re: Electronic motor speed control.

On Tue, 20 Sep 2005 22:33:00 -0700, Don Davison wrote:

> I am interested in buying or modifying an electronic speed control with
> two types of controls. The motor will be used on a gantry (for the tool
> motor) and should be selectable by the operator, but yet be changed by
> an encoder mounted to keep track of how fast the gantry is moving. The
> idea is to keep the tool motor turning at a constant rpm-to-linear
> travel. For example I should be able to set the speed of a sewing
> machine to get a specific number of stitches per inch regardless if the
> gantry it is resting on is being moved manually at 2 inches per second,
> or 8 inches per minute. This is necessary to keep the stitch the same
> size regardless of speed. Does anyone know of such a control for less
> than 200 dollars? Sewing Robot

Really depends on required speed accuracy - if the sewwing machine
already has a electronic speed control and you can tolerate a 10-20 %
tolerance, you may need nothing more than a simple tachometer circuit for
the gantry that drives the sewing machine controller in an open loop
fashion...

Peter Wallace
.

Relevant Pages

  • Re: Electronic motor speed control.
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