Re: [CAD_CAM_EDM_DRO] Re: RE: DRO UPDATE

Dan,
I may well do that also in the future, I justed wanted to try
everything out with the lowest cost to start with. I like the idea of
getting away from the parallel port if possible.
Terry

--- In CAD_CAM_EDM_DRO@onelist.com, "Dan Mauch" <dmauch@s...> wrote:
> That is why I gave up on steve's software and wenbt with Tom
Kulaga's
> design.
> Dan
> -----Original Message-----
> From: Terry May <tmay@...>
> To: CAD_CAM_EDM_DRO@onelist.com <CAD_CAM_EDM_DRO@onelist.com>
> Date: Saturday, March 04, 2000 9:06 AM
> Subject: [CAD_CAM_EDM_DRO] Re: RE: DRO UPDATE
>
>
> >From: "Terry May" <tmay@...>
> >
> >Art,
> > I need some help here, I put together a circuit using a 74hct14
> >like you did but I can't seem to get it to work with a computer.
When
> >I run Steve Linsay's dro40 program it doesn't react to the movement
> >of the encoders. I've tried it on three different computers,
setting
> >the parallel ports to both ECP and EPP, there's just no movement of
> >the readout for any axis. I've tried it in a DOS window under 98
and
> >booting directly to DOS.
> > The part that's driving me crazy is that when I hook up the
> >encoders to a Pwr Sup and a scope I get good square waves out of
the
> >chip on all 6 lines to the parallel port connector. I've checked
the
> >wiring about a gazillion times but can't find any mistakes.
> > Using the parallel.exe program Steve included with his SW, the
> >ports look good, but when I use his Portstuf.exe hooking an
external
> >voltage to the port pin 2 and grd pin 22 doesn't have any effect. I
> >can change the port setting using the keyboard in the program but
> >that's it.
> > I don't have any other ways to check the ports that I know of,
but
> >when I hook a Snappy video capture device to the ports they work
fine.
> >
> > Any ideas?
> >Thanks
> >Terry
> >
> >--- In CAD_CAM_EDM_DRO@onelist.com, "A. G. Eckstein" <axtein@s...>
> >wrote:
> >> Terry,
> >> Thanks for the words of encouragement. I need that and hope my
> >little bit
> >> will help. I appreciate all the words that I have gotten on the
> >site and as
> >> things progress, will try to update it. My long term goal is to
get
> >to the
> >> magical resolution of 0.0001"
> >> Actually, when I started the goal was to get accuracy to 0.001"
> >with no
> >> backlash. I have far exceeded that but now it is a challange.
> >>
> >> Please let me know if I can help further.
> >>
> >> Art
> >>
> >> At 11:56 PM 02/28/2000 -0000, you wrote:
> >> >From: "Terry May" <tmay@...>
> >> >
> >> >Art,
> >> > Just wanted to tell I have been looking at your website, great
> >> >pictures!! It really helps to visualize your setup as you have
been
> >> >discribing it on the list. I hope my DRO turns out to be half as
> >good
> >> >as yours.
> >> > Just a quick update from my shop, I didn't have any 7414's or
the
> >> >decrete transistors that Steve Linsay used on my bench so I just
> >> >played around a bit. Hooked up the encoders to my scope and
checked
> >> >out the waveform and then used a freq counter to do the same.
All
> >the
> >> >encoders look like they are working fine so after work tomorrow
I
> >> >will pickup some chips at Radio Shack and put together a board.
> >> > Concerning the discussions about wires/cables for the setup, I
> >have
> >> >lots of good parts left over from a dearly departed HP plotter.
> >> >Amoung the goodies are all the wires used to move the pen
holder, I
> >> >think they will be long enough for the Y and Z axis' of my
> >mill/drill
> >> >if not the x axis.
> >> > As I was playing with the encoder still hooked to the motor
and
> >> >reading it with the freq counter, I realized that just one
channel
> >> >out of a 1000 line encoder is a very nice division factor for a
> >> >tach????. I think I will experiment with that a little also.
> >> > Thanks again for sharing your experiences and your website!
> >> >Terry May
> >>
> >> OLDER THAN DIRT
> >>
> >> Country Bubba
> >>
> >> (Actually the inventor of Country and Bubba)
> >
> >
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