On Thu, 2007-12-06 at 14:08 -0800, Peter C. Wallace wrote: > On Thu, 6 Dec 2007, Kirk Wallace wrote: > > > Date: Thu, 06 Dec 2007 11:43:27 -0800 > > From: Kirk Wallace <[EMAIL PROTECTED]> > > Reply-To: "Enhanced Machine Controller (EMC)" > > <emc-users@lists.sourceforge.net> > > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > > Subject: [Emc-users] Slides, Endoders and Resulotion > > > > I got the first pass on my Bridgeport X axis working and I am having ... snip > > controller. Is there a way to cater to both? > > > > One way is to use dual feedback, Dont know if EMC supports this or not. > > > > > I seem to have a consistent (non-self energizing) oscillation across a > > wide P range (30 to 280). I am wondering, is this is due to the .002" > > screw backlash, or this backlash being on the motor side of the encoder, > > the relatively low encoder (slide) resolution or all of the above? Which > > has the greater influence? > > > I would say the backlash would be the major source of the oscillation. Even > with dual feedback, It would be problematic to prevent 'hunting' . I guess it > would be simpler to use a rotary encoder and have EMC do the backlash > compensation. > > What is your deadzone? ... snip
If you mean deadband, I have it set to 1e-05. I set it to 1e-04 and 1e-06 which had no effect. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending) ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
