Sebastian Kuzminsky wrote: > It's a Pittman 8322, overdriven from 19.1 V to 24 V. The rated > top speed (at 19.1 V) is 7847 rpm, rated peak torque is > 7.4 oz*in. There are excellent manufacturer's specs here: > <http://pittmannet.com/series8000motors.html>
> Bummer, I was hoping to do it all in software on the PC using just the > parallel port for I/O. > > If you limit the speed to 1200 RPM, you will be handicapping the motor. The power that a motor delivers is the product of speed and torque. If you cut the top speed from 7847 to 1200 RPM, you can only get 15.3% of the motor's rated power out of it. That's pretty bad. A configuration that lets the motor spin to full speed (either a lower PPR encoder, or hardware to count the pulses) will let you get full power out if it. That might mean using toothed belts or gears to reduce the shaft speed to match your screw, but when you reduce the speed that way, you gain torque. If you reduce speed electrically, you do NOT gain any torque. Regards, John Kasunich ------------------------------------------------------------------------- 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
