TTL laser 2W

triblax

Please, can anybody help me, how to wire & setup ramps 1.4 (mega2560) + repetier.
TTL laser driver:
https://www.aliexpress.com/item/12V-TTL-1W-2W-3W-445nm-450nm-Laser-Diode-LD-Driver-Power-Supply-Stage-Light-lighing/32684581863.html

I have problem with setting intensity, only On+Off works.
I use pin 11, 
in Configuration.h I set 

#define SUPPORT_LASER 1

#define LASER_PIN 11

#define LASER_ON_HIGH 1

#define LASER_PWM_MAX 255

I try modify Drivers.cpp

void LaserDriver::changeIntensity(uint8_t newIntensity)

{

    if(EVENT_SET_LASER(newIntensity))

    {

        // Default implementation

#if LASER_PIN > -1

//        WRITE(LASER_PIN,(LASER_ON_HIGH ? newIntensity > 199 : newIntensity < 200));

        analogWrite(LASER_PIN, newIntensity);

#endif

    }

}

Repetier

You need to implement EVENT_SET_LASER so that it sets intensity as wanted and returns false. The required logic depends on the solution you choose. Is it a AVR pin with free timer, then you can set the time to intensity, but make sure the period is fast enough. Others have a chip with SPI connected to make it a pwm signal. If you just want to cut with laser controlling speed is enough.

triblax

thank you, I readed this answer in other thread,
but implementation of this changes is above my options,
it's works in grbl, but I want only one board with 1 code inside for cnc, laser & 3d printer...

Repetier

We are working on V2 where PWM becomes a own class and we plan to also add hardware PWM if pins match. But might take a while until we are there. In that case you could just select the hardware pwm class.

triblax

thank you, good info