RE: [CAD_CAM_EDM_DRO] Linux EMC RS232?

I was thinking about this the other day. I think with the abundance of
cheap Serial PLC based Stepper controllers coming around the bend we'll
see demand for this support pretty soon. Specifically, I took a long
hard look at the dual stepper controller from
http://www.stepperboard.com/ncstepper.htm . With the NC firmware setup,
you can send the board a "go to X,Y" or "arc to X,y A,b N" and the
controller does it while you sit and wait for the Serial "Busy" pin to
drop. It supports micro, half,and full stepping, with mode changes on
the fly. That makes the Software component of it a lot easier, because
it takes away all the where-am-I, get-from-here-to-there, and
don't-move-too-fast logic.

I was really impressed with the possibilities here, but decided to go
with the more conventional Parallel port setup. (Because I want this to
work before the end of my natural life, and I am a very slow programmer)

... And $129 for an assembled and tested 2 amp, 34 volt microstepping
dual motor controller seems like a very good deal to me.

-Ejay

-----Original Message-----
From: Jon Elson [mailto:elson@...]
Sent: Wednesday, November 05, 2003 12:21 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Linux EMC RS232?



paragon032003 wrote:

>Dear group can EMC use the RS232 port (serial) instead of the printer
>port?
>
>

For what? To control a CNC machine? In principle, yes, but it does
not currently support any motion control hardware that works from
the serial port. The parallel port is a natural for driving stepper or
servo drivers that accept step and direction signals.

Jon


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