I've retrofitted a Sherline/A2ZCNC with servos. Given the choice I would always use them over steppers because they close multiple control loops. For some photos of the custom motor mounts and other stuff you can check out the last three issues of Digital Machinist magazine and look for the ServoMill articles. Cheers, Jim
-----Original Message----- From: Jon Elson [mailto:el...@pico-systems.com] Sent: Thursday, November 17, 2011 12:41 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] how small kqt4a...@comcast.net wrote: >> Or maybe a Sherline or MaxNC. >> > > I feel sure I am wrong but from reading this mailing list I get the > impression that servo drive is superior to steppers > By superior I mean more accurate > Has anyone outfitted a Sherline with servos > I've done a Taig. Servos are not necessarily more accurate, but the positioning is PROVABLE, meaning that the encoders can be fed back to the computer for continuous measurement. So, you can graph the error at various speeds and during acceleration, and then KNOW what the following error is. With steppers, there is very little following error (they lose sync if error exceeds half a full-step), but there are delays in the stepper drive and resonances that can worsen accuracy. And, of course, the computer never knows when a stepper loses a step or stalls, and blindly continues cutting the part wrong. But, then I'm an avowed servo bigot. Jon ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users This communication is for the use of the intended recipient only. It may contain information that is privileged and confidential. If you are not the intended recipient of this communication, the disclosure, copying, distribution or use hereof is prohibited. If you have received this communication in error, please advise me by return e-mail or by telephone and then delete it immediately. ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
