////A few thou on a mill is really not that big of a deal although, it still should not be happening. How are you generating code? Is it absolute or incremental? Always program in absolute, it's much easier to keep up with zero's. Sounds like its in the programming. If it were always one axis, I'd be looking at crosstalk issues or a bad encoder. Still may be encoders especially if you are using an auxillary power supply. The USdigital encoders are a good match for Geckos, powered right off the drive. If the power supply can deliver the current (try adjusting accelleration and velocity to a lower setting), the encoders are accurate and there arent any crosstalk interference issues it should never lose position. The PC hard drive would be a very unlikely candidate. And it may just be software? If you use note pad for programs, write a small or use a small program that does not display end cycle position errors then copy and paste the X,Y and Z moves several times to make a pro gram several minutes long. If there are no errors then I'd be looking for some new CAM software. I use Mach2 for control and mine never loses position. Find a 1 ghz. or better laptop and try a different control software. Ultimately, a servo system should never lose position. Ron
mmurray701 <[EMAIL PROTECTED]> wrote: I have a Taig CNC mill powered by G320's, Electrocraft E543 servos with renco encoders setup in a 2:1 reduction. Running off a P133 in dos with TurboCNC V3 (not sure exactly what version but its the latest release of V3) I'm picking up a few thousandths on long machining files. If I run an hour long program i could be off by a few thousanths on X or Y, seems to vary depending on what file i'm running. I've written all sorts of test files and can never seem to duplicate the problem. I have no idea whats causing it, tried almost everything to fix it with no luck and its really starting to turn me off from CNC machining. I thought I knew enough about this to solve it but no luck. Have to turn to the experts on here for help. The fault lights are not comming on, I've tried a different computer, and shielded cables are used everywhere so picking up steps is unlikely. Anybody have any suggestions on something else to try? When I did switch computers, i did keep the same hard drive, should i format it and start fresh? Anything else? Addresses: FAQ: http://www.ktmarketing.com/faq.html FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/ Post Messages: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] List owner: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] Moderator: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] [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 --------------------------------- Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. [Non-text portions of this message have been removed] Addresses: FAQ: http://www.ktmarketing.com/faq.html FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/ Post Messages: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] List owner: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] Moderator: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] [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: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
