Laser diode instead of servo motor

[panosss]

I use the GRBL for unipolar stepper motors GRBL-28byj-48-Servo library, which uses your library (grbl-servo).

I replaced the servo motor with a laser diode, 5mW, this one.
But when the diode lights on (with M03 S255, or any number) it does not come off with M03 S1.
Or M05. It only dims.
With M03 S255 is bright and with M03 S1 it 's a little less bright. (not great difference but noticable)

So I have to modify the code to switch the diode on and off.
How can I do this?
As a switch I use a 2N2222A transistor.

[robottini]

Hi you have to use the vanilla GRBL, not this one. See https://github.com/grbl/grbl

[panosss]

(thanks for the so quick reply!)
The vanilla GRBL is for bipolar stepper motors. (I have unipolar stepper motors, this is why I use GRBL-28byj-48-Servo)
There must be some way to use your code (modified) with a laser diode.

If I have understood well, the posistion of the servo is set by voltage level on the contol pin of the arduino, right?
So, if I can make it go to 0 Volts, it might work.

[robottini]

Sorry I don't understand. The vanilla version has a feature for using the laser. https://github.com/gnea/grbl/wiki/Grbl-v1.1-Laser-Mode Or are you speaking about some else that I don't understand. My version of the GRBL is realized to support a servo motor not a laser. Best regards Alessandro Il giorno ven 25 gen 2019 alle ore 18:38 panosss <notifications@github.com> ha scritto:

…

(thanks for the so quick reply!) The vanilla GRBL is for bipolar stepper motors. There must be some way to use your code with a laser diode. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#20 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AMjR0yCxTFN4OdLWDebYd5-ASdPh8e77ks5vG0ECgaJpZM4aTR7r> .

[panosss]

I can't use the vanilla version of GRBL because it is for bipolar stepper motors.
I have unipolar.