Hi Neil, Encoder resolution is one of several factors that affect following error. Following error is the difference between the commanded movement and the actual movement. A movement command is a combination of actual physical movement occuring a particular rate. Encoder resolution, servo amplifier response, motor response, mechanical systems response, etc. all add up to some lag because these different systems cannot respond instantaneously to the control command.
I don't have a formula for calculating this. It's stupid not to ask questions. Questions in and of themselves are not stupid. I've been laughed at more than a few times because of the questions I have asked. After the laughter died down and I received an answer I was a smarter man. Have a good day, Jim Fleig CNC Services ----- Original Message ----- From: "Neil Baylis" <[email protected]> To: "Enhanced Machine Controller (EMC)" <[email protected]> Sent: Friday, May 07, 2010 12:41 PM Subject: [Emc-users] Encoder resolution & Following Error >I hope this isn't a really stupid question, but what's the relationship > between encoder resolution and following error? > > For example, the machine I'm building currently has a linear encoder of > 250 > cycles per inch, or 1000 counts. I assume this won't allow me to achieve > 0.001 following error. And I understand FE is also affected by machine > rigidity, encoder noise, and other factors. > > Is there a formula that would tell me what FE would be reasonably > achievable > with my machine? > > If I install an encoder with double the resolution, will that cut my FE in > half? > > Neil > ------------------------------------------------------------------------------ > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
