Re: [CAD_CAM_EDM_DRO] Re: RE: DRO UPDATE

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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