Re: [CAD_CAM_EDM_DRO] Need help with SuperCam step size settings

How are you measuring the 1.001" of travel? There are many ways to do this,
and some of them are prone to causing errors. Also, is it a consistent 0.1%
error over the entire leadscrew? If so, then it is most likely not
leadscrew inaccuracy. DO not take this last comment as offensive, but if
you need greater than 0.1% accuracy, you may need a better machine. What
types of parts are you making?

Daniel J. Statman, Statman Designs
www.statmandesigns.com
dan.statman@...

----- Original Message -----
From: "SMW51" <michaelwagner@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, September 29, 2002 7:35 AM
Subject: [CAD_CAM_EDM_DRO] Need help with SuperCam step size settings


> The x axis, actual travel, on my Taig mill is .001 per inch longer
> than it should be. I assume the problem is related to a less than
> perfect 20 tpi leadscrew. I calculate that I need to use 7992 half
> steps instead of 8000 to compensate for the error. If my math is
> correct that will translate to .000125125 instead of .000125 travel
> per half step. So far as I can tell the SuperCam 'set step' commands
> allow for a 6 digit field. Entering .000124 or .000126 would clearly
> make the problem worse. I haven't been able to find a way to change
> the number of half steps to 7992. Is there a way to make this
> change? If not is there any other way to compensate for the error?
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> 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 as 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........
>
> 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@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> bill,
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>