> On 27 Jun 2020, at 5:26 pm, Gene Heskett <[email protected]> wrote:
>
> 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.
The mp4 looked like that here as well but after I pressed play it was fine.
>> servotest.mp4
>> <https://drive.google.com/file/d/1qnNP15i66IRKaUIIPh33Bh1FKa5AMg5_/vie
>> <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
> <http://geneslinuxbox.net:6309/gene>>
>
>
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