Re: Digest Number 1 & homebrew DRO

I didn't know that US Digital had a PC inerface card. This would
be the way to go for a dro. Life is probably much similar this way rather
than
using my http://www.angelfire.com/biz3/handengraving/dro.html program.
Mine will work fine but some people have a heck of the time getting the lpt
port right to work with the program. I would think an interface card
would be faster
and US Digital is probably doing a lot of the work on the hardware/interface
that
I was doing in code.
Steve
http://www.angelfire.com/biz3/handengraving

PS.... What a great group!

> Message: 1
> Date: Fri, 7 May 1999 07:46:17 -0400
> From: rmcilvaine@...
> Subject: Re: Digest Number 1 & homebrew DRO
>
> Well I got the digest #1 last night (the second digest, since there was
> a digest #0). Since my introduction was labeled message #1, anyone who
> signed up after it was posted didn't see it (unless they signed up for
> digested as well), so I included it below.
>
> As I noted below, I'm in the process of doing my own DRO. Resolution of
> the encoders is probably biggest $ consideration. In other words, the
> more resolution you want the more $ you need.
>
> US Digital can provide linear encoders that will provide resolution of
> .0006". These cost around $50 bucks each, depending on length, shorter =
> cheaper. The are also manufacturers that have linears with .0001"
> resolution, they'll cost around $500 for an 18" version.
>
> I got the US Digital PC interface card. It has 4 channels, so, while I'm
> only using 2, one for X and one for Y, I can expand to a Z axis if
> necessary. At this point I don't know what I'd do with a 4th dimension,
> speed I suppose.
>
> The actual display was cheap, that old PC that been gathering dust since
> the last upgrade was free!
>
> I wrote the software, so I can make it do what ever I want. Currently,
> it displays X and Y travel as well as feed rate. It can do presets,
> zeros...the usual stuff.
>
>