Re: [CAD_CAM_EDM_DRO] Re: Digitizing

Hi Alex,

OK, I see your line of thought. And indeed, A/D converters are used to
digitize pots.

As far as the probes used in CNC and CM, I believe you'll find the
equivalent of a switch in each of the 3 (or more) axis of movement.
These systems rely on the position accuracy of the CNC system for the
locations or offsets.

Where an A/D could be useful is in reading a potentiometer, with a user
set value, such as speed override, or any other value that might be
read.

A 144 Mhz (2 meter) digital radio that I built used an A/D channel to
read the volume control as I recall.

Alan KM6VV


alex wrote:

>
> Alan,
> for audio analog reading of amplitude are being entered into A/D
> converter and digital readings received 8,000 times per second.
> I presume that your probe is being attached to the potentiometer which
> generates analog voltage which in turn goes into
> A to D converter. In this case it is quite similar to an audio.
> Isn't it correct?
> Alex
>
> Alan Marconett KM6VV wrote:
>
> >Hi Alex,
> >
> >Thanks for the offer, but we may be confusing digitizing sound with
> >digitizing an object. In our use, a probe must be driven around or near
> >an object, and the coordinates of points of contact recorded. Offhand I
> >can't see where digitizing an audio stream would be similar.
> >
> >Alan KM6VV
> >
> >alex wrote:
> >
> >
> >>About 10 years ago our consultant developed digitizing program in DOS
> >>(for audio stream). They used serial
> >>port timer in assembler and it worked great. If you need more info I
> >>probably can find an original code.
> >>Alex
> >>
> >>Alan Marconett KM6VV wrote:
> >>
> >>
> >>
> >>>Hi Graham,
> >>>
> >>>I'd like to see your 'C' source code, and I believe I can help you on
> >>>the uS timing code (in C) as well. I use the the 8254 timer in a PC,
> >>>just as Dave does in TurboCNC (Pascal). From and old paper on timing
> >>>written in Pascal.
> >>>
> >>>Alan KM6VV
> >>>
> >>>
> >
> >
> >Addresses:
> >FAQ: http://www.ktmarketing.com/faq.html
> >FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> >Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> >
> >Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> >Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> >List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
> >Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
> >URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >
> >OFF Topic POSTS: General Machining
> >If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
> >http://www.metalworking.com/news_servers.html
> >
> >http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
> >
> >NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> >bill
> >List Mom
> >List Owner
> >
> >
> >
> >Yahoo! Groups Links
> >
> >To visit your group on the web, go to:
> > http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/
> >
> >To unsubscribe from this group, send an email to:
> > CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> >
> >Your use of Yahoo! Groups is subject to:
> > http://docs.yahoo.com/info/terms/
> >
> >
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
> Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/
>
> To unsubscribe from this group, send an email to:
> CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/