Re: [CAD_CAM_EDM_DRO] Home built controller vs. bought controller

On Sun, 26 Oct 2003 11:10:29 -0000, you wrote:

>I'm looking into controllers and was wondering:
>
>1. If you built your own, where did you get the source documentation
>(ie, schematics)?

Allegro, who makes the chip (297/298).

>
>2. If you bought yours, where did you buy it from?

didn't.

>
>3. Things you wish you knew then that you know now about controllers.
>

subharmonic lockon of the chopper circuitry and the necessity of
being able to add a filter to remove current spikes. (Happened, and
is now in the next generation of boards).

Plus a few things about how Eagle Cad makes boards.

Harvey

>
>Thanks,
>
>Matt S.
>
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>