Sebastian Kuzminsky <[EMAIL PROTECTED]> wrote: > Jon Elson <[EMAIL PROTECTED]> wrote: > > You need a lot more voltage supplying the H bridge. At 55% duty > > cycle, you are getting 12 * 0.55 = 6.6 V at the motor. I am a > > little surprised the motor doesn't start to turn before this, it > > must have a lot of friction. Have you measured the motor > > current just before it starts to turn? That would be > > interesting to know. > > ... > > I don't have an oscilloscope, just a cheap multimeter, so I don't think > I can accurately measure the current just at spinup time.
Or wait, would this work? I'll put the ammeter inline with one of the motor leads, and set the duty cycle to just below where it'll turn the shaft. The power is pulsed so current varies over time, but the ammeter should average it, right? Maybe if I put it in its AC mode? I'll try this tonight. -- Sebastian Kuzminsky ------------------------------------------------------------------------- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
