On Sat, 2007-10-20 at 13:20 -0500, Jon Elson wrote: > Kirk Wallace wrote: > > I wanted to have a real motor/encoder system for my office EMC instead ... snip > You do not see this on "good" motors. You can check for this > with either a variac- or electronically-controlled power supply > that you can turn down to a fraction of a volt. Set the supply > so the motor just rotates, at maybe 10 RPM. If it just stops > somewhere, that motor either needs the commutator to be cleaned, > or it has an open connection to the commutator. > > Jon
I connected the motor to my lab supply and got the motor to turn very slowly at about 4.5 Volts. At the slowest speed, it would only stop if I reduced the voltage. So I guess I have a "good" motor and I just need to work more on the tuning. Maybe, add more P to get the initial voltage up to 4.5 but then add more D (?) to fight the oscillating. Well, I wanted a real world test bed, I guess I got it. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe Bridgeport mill conversion pending Zubal lathe conversion pending) ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
