Re: Re:EHP External Hardware Proposal

Hi William,
Thanks for the link. It look OK neat PCB with silk screening also...
It has stepper drivers so it will not fit what I am trying to do...
I checked out the Command summary page, and noticed he has also done the bit fiddling thing as I proposed earlier today...

I want to make unit that will use existing stepper driver for the Step/Direction type of hardware that so many are using, and
not obsolete good equipment.... The work would be mostly a software issue as I sure when I get down to doing the Microcontroller
thing it will not take long..

Thanks again... all input is welcome..
regards
Hans Wedemeyer



William Scalione wrote:

> From: William Scalione <scalione@...>
>
> To all interested in the external hardware for stepper/servo control;
>
> I have been using a stepper controller that I got from
> http://www.eggertelectronics.com/
> quite a while ago. It uses RS232 port, controlls 3 axis', lots of I/O,
> and is somewhat smart.
> Uses an 87C51 embedded controller, has amps on board. cost about
> $100.00.
>
> Simply send number of steps, speed, and direction to the controller and
> it does the rest. Poll
> the port for the finished moving flag and you know when it is done. I am
> a really really bad
> programmer, but even I wrote something halfway decent for it. I use it
> on a old CNC lathe that
> is now manual CNC only with no taper cutting (see below)
>
> I am NOT suggesting that we use this board, because it has some definite
> problems. First It can't
> be used as a cnc control because it uses integers in its calculations so
> while a X10 Y5 move is
> possible (2 to 1 ratio) an X10 Y3 (3.3333333 to 1 ratio) is not
> possible. Also it is a R/L drive
> which I'm sure nobody wants.
>
> I only bring this up on the chance you guys may get some ideas from
> looking at the commands
> required to control it, which are posted on his web site. He did mention
> that he was working
> on another board which will fix integer and R/L problems mentioned.
>
> Bill
>
> --------------------------- ONElist Sponsor ----------------------------
>
> GET A NEXTCARD VISA, in 30 seconds. Get rates as low as 2.9 percent
> Intro or 9.9 percent Fixed APR and no hidden fees. Apply NOW.
> <a href=" http://clickme.onelist.com/ad/NextcardCreative4SR ">Click Here</a>
>
> ------------------------------------------------------------------------
>
> Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the discussion of shop built systems in the above catagories.
> To Unsubscribe, read archives, change to or from digest.
> Go to: http://www.onelist.com/isregistered.cgi
> Log on, and you will go to Member Center, and you can make changes there.
> For the FAQ, go to http://www.ktmarketing.com/faq.html
> bill,
> List Manager