On Sun, 2 Aug 2009, cmg...@sover.net wrote:
> Date: Sun, 2 Aug 2009 22:34:35 -0400 (EDT)
> From: cmg...@sover.net
> Reply-To: "Enhanced Machine Controller (EMC)"
> <emc-users@lists.sourceforge.net>
> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
> Cc: Enhanced Machine Controller <emc-users@lists.sourceforge.net>
> Subject: Re: [Emc-users] Mesa 7I43 use with EMC2 a pimer please?
>
>
> Ahh
>
> An interpreter tucked in hostmot?
>
>
>
>
> Cal
Actually much simpler, really just an accumulator that has a number (the step
rate) added a high fixed rate (many MHz). When this accumulator overflows, a
step is generated (this is sometimes called a DDS or a phase accumulator). I
left out a few details but thats the core of the logic. Other than details
like feedback and setup/hold times its really just a variable rate digital
oscillator...
Peter Wallace
Mesa Electronics
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