RE: [CAD_CAM_EDM_DRO] Newbie - Z-axis slipping

Could be your work surface is not flat ?
are the problem holes always in the same area ?

Or your gantry / pantograph is not at absolute right angles to the
worksurface.

Easy test for all this - just clip a dial gauge to your Z axis
and move it around the table - keeping a good eye on the readings.

Rgds

Dave Fisher UK


-----Original Message-----
From: Janice [mailto:bigforkshop@...]
Sent: 30 January 2004 19:57
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Newbie - Z-axis slipping


I'm brand new, self taught on my CNC router/engraver. I am
currently using a single drill point function where I am drilling 30-
90 holes per part, at a precise depth of 0.043. I am losing depth
starting at about hole 25, and losing up to .030 worth of depth over
the course of the remaining holes. Am I expecting an unreasonable
level of precision, or are there some explanations for why a Z-axis
would lose depth? Thanks in advance!



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/