Re: Encoders on stepper motors.

At 22:30 25/03/2001 +0000, you wrote:

> The ecoders catches missed steps caused by: Bad feed rates,
>dull tools and line noise. Set you machine and program up to drill a
>hole in each corner of your table. Use a scrap piece of plastic. Use a
>tiny drill. Run the machine for two hours drilling the same holes
>over and over. Use your fastest traveling speed between holes. All
>four holes should look round when it is done. A broken bit says it
>all. I used to have a line noise problem before I moved my controller
>to a computer supply. Running a Shop Vac or electric drill on the same
>line as the machine can also cause problems. I run my Dremel on a line
>cord plugged into a different socket on a different line.

Surely if you have line noise problems, using encoders won't necessarily
fix the problem - its just as likely that the encoder signal will be
affected, giving a false reading of the actual position.

Regards,
Tony