Re: [CAD_CAM_EDM_DRO] Knuth DRO's from Singapore on EBAY - has anyone bought them?

Unless there is an absolute guarantee there is an easy-to-contact hassle
free repair location that will not disappear in a year I wouldnt touch the
thing for even half that cost.
Besides, Sargon DRO's are going on Ebay for $850 or less.

Vince

----- Original Message -----
From: "Jon Elson" <elson@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, November 06, 2003 10:38 PM
Subject: Re: [CAD_CAM_EDM_DRO] Knuth DRO's from Singapore on EBAY - has
anyone bought them?


>
>
> Ted Inoue wrote:
>
> >I've recently stumbled across the following EBAY ad:
> >item number 2570941080
> >
> >They have 2 and 3 axis, Knuth DRO units with glass scales, rated at
> >0.0001".
> >Looks like a decent unit and the prices can't be beat for the
> >features. $549 for 2 axis, $779 for 3 axis, plus $88 shipping charges.
> >
> >
> Note that just because the readout DISPLAYS 4 digits to the right
> of the decimal point does not mean it actually has that resolution.
>
> People in the industry have told me than nobody makes actual Imperial
> (Inch) scales since the late 1960s! So, all the scales are actually
metric,
> and they do a conversion to inches in the readout box. Unless you pay
> a fortune, the best scales you can get are typically 5 uM, which gives
> a resolution of roughly 0.0001969". That is about .0002", but not
> EXACTLY .0002". Therefore, if you fiddle with one for a bit, you
> will find there are certain readings you CAN'T get to! This drives some
> Inch-bound machinist slightly batty.
>
> Jon
>
>
> 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@... [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
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>