Re: [CAD_CAM_EDM_DRO] Re: Newbie - Z-axis slipping

Is the drill being pushed back into the chuck

jmosufsen <jmosufsen@...> wrote: --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Janice"
wrote:

> 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!

Chances are pretty good that your depth loss is due to thermal
effects (e.g., thermal expansion). Even stiff, heavy-duty industrial
CNC machines need to have their offsets readjusted after they warm up
or after they've been running for a while.

Jesse


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/





---------------------------------
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!

[Non-text portions of this message have been removed]