Re: [CAD_CAM_EDM_DRO] Ball lead screw backlash problems

Paul, Are you sure it isn't in the endplate bearing? .004" backlash is alot for a ballscrew. If someone installed standard ball-race bearings instead of dualrow angular contact they will more than likely have endplay.

Ron



CalBoy101 <pt@...> wrote:
I bought a previously retrofitted BP clone mill and I'm just getting
it up an running with a new PC based control.

I'm seeing more backlash on the X and Y lead screws than there should
be- .001" on the X and 0.004" on the Y.

The backlash is uniform on the full length of both screws, so it looks
like the nuts are worn but not the screw themselves. So far I can't
find any manufacturers names on the screws, and I can't see the nuts
very well without taking the table off.

Is it possible to replace just the nut on a ball lead screw or will I
have to replace the whole set to get rid of this backlash?

Thanks,

Paul T.




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








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