Did you say they are "direct drive" ? You will probably have to run those motors through a 3:1 reduction (or so)if your lead screws are 5 turns per inch. 3 x 5 = 15 rpi. 15 x 1000(ppr) = 15000 pulses per inch.
--- In [EMAIL PROTECTED], "kadeshan" <[EMAIL PROTECTED]> wrote: > > Motors have 250 cpr encoders. Machine runs very smooth, turcite ways > and such, smoother than my mini mill was. I don't have motor cables > and encoder cables in the same tube, they are just temporarily routed > to machine. They are shielded cables. I don't have a ground between > machine and control. I can get them to run if i move them at like > 1ipm without faulting so the motors leads are correct. Motor run > fine when the aren't hooked up to mill. > > --- In [EMAIL PROTECTED], "Bloy2004" <[EMAIL PROTECTED]> > wrote: > > > > to really help you out one would need more information about your > > setup. The drive train ratio, the CPR of the encoders, friction > > factors, etc. Given a full list of your system may enable someone > > to locate where or what is causing your drives to fault. > > Since you said "fault almost immediately", sometimes a simple > > reversal of motor connections will work, but that is just > conjecture > > at this point. > > > > > > --- In [EMAIL PROTECTED], "kadeshan" <[EMAIL PROTECTED]> > > wrote: > > > > > > Here is a little background, just got an exact jr bare frame, and > > was > > > going to add my own motors/controls. Here is the mill > > > http://www.ameritechcnc.com/exact%20jr%20series.htm I asked them > > > what servos they use, and they said 16 ft lbs cleveland servos. > > > Direct drive. I got some off of ebay. I bought these motors > > > thinking they would be sufficient > > > http://cgi.ebay.com/ws/eBayISAPI.dll? > > > ViewItem&category=42895&item=3849879999&rd=1 . I got everything > > > hooked up, I have the accel/velocity turned way down. They fault > > > almost immediately. Is there something I am doing wrong, or > these > > > motors just not up the the job at hand? Thanks 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/
