My CNC Mill uses Yaskawa analog input servo drives with Pico Systems PPMC. You need to use a PI/P (not PID) cascaded control scheme. There are articles in Digital Machinist magazine that describe the entire build, but Part Three is most relevant to your concern. It also has a full schematic:
Building a Simple Servo Mill - Part Three: Powering it Up Computer Numerical Control (CNC) Louis, Jim DM Vol. 6 No. 3 Fall 2011 Building a Simple Servo Mill - Part Four: Making it Work Computer Numerical Control (CNC) Louis, Jim DM Vol. 6 No. 4 Winter 2011 Jon was a big help in doing the servo tuning on my mill as well. Jim -----Original Message----- From: Jon Elson [mailto:[email protected]] Sent: Thursday, July 12, 2012 11:06 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Yaskawa Sevo Drives? Todd Zuercher wrote: > My motors are brushless, and I intend to use Linuxcnc. > > It sounds like (as I suspected) Yaskawa drives are not an option. > If you don't need 6000 RPM, then I might suggest the Pico Systems brushless PWM servo amp and our PWM controller. They are good to 120 V, so you can still get 3000 RPM. The motor must provide commutation signals either from the motor or the encoder for most drives. There are sensorless drives that can work without those signals, they do cost extra. Jon ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] 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. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
