Ali, Just a heads up as one who went through the PID tuning not too long ago. Before even trying to adjust the PID values, make absolutely sure all of your ini file parameters are correct / reasonable. I was tuning my PIDs at the same time some of the units changed in the ini files, and ended up using an accel intended for mm when I was using inches, and managed to drop one of the zeros from the base period. I must have looked at the ini files 10 times before I noticed my error and in the process could not figure out why I could not get my motors to tune.
Once I had these values set correctly, the PID tuning then was really quite easy and I was able to do it entirely by ear. I brought up P until the motors hummed, backed off a little, then slowly incremented P and D until I was getting a position error of about 1-2 encoder counts or less on a short move (entering values such as G1 X10 through the MDI interface). With "I", I started with a value of 5, and never had a reason to change it. Regards, Eric > Thanks for the response, I know how to run emc and halscope > from the command line, I was specifically referring to the > process of logging the data in either halscope or some other > way, I don't think that part is quite working yet, or I could > be mistaken. > > What I am trying to do is outlined here: > http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?PWM_Servo_Amplifiers > > I think that article is written by you ? I could not get the > emclog.tcl script to work in ver 2.0.5, I am running Ubuntu > and have all the necessary packages installed. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
