On Saturday 27 June 2020 03:10:46 Chris Albertson wrote: > I figured this would be easy and I was right. > > The HAL and INI files are produced by Stepconf with no edits. I > connect a cheap $5 hobby servo motor to the parallel port pin #16 with > no extra hardware, just a wire. I also run 5 volts DC to the motor. > The default signal generated by pwmgen and intended to control > spindle speed is directly used to control this motor. > > The neat thing is that no driver electronics are needed, just a direct > connection to the parallel port. These motors are powerful enough to > do things like turn and adjust coolant valves or in my case turn the > 4.7K pot that controls spindle speed. > > I used the default HAL file for this test but in real life, some > multipliers might be needed to scale value to an angle. > > Pictures below > 1) screengrab of scope showing that PWM is 100 Hz so that it will > certainly work with any hobby servo. > 2) video of the servo moving in response to clicks on "Axis". (we > will see if .mp4 video works on this list server) > > [image: Logicscreenshot.jpg] > The idea should just work, unlike the .mp4 which shows the loading icon forever.
> servotest.mp4 > <https://drive.google.com/file/d/1qnNP15i66IRKaUIIPh33Bh1FKa5AMg5_/vie >w?usp=drive_web> Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
