Created with LW4, sent to láser Machine with LW3.

Created with LW4, sent to láser Machine with LW3.
Board Ramps 1.4 running grbl 1.1e.

I am surprised, arduino mega 2560 can run grbl 1.1e. :slight_smile:

Running Grbl native on mega 2560 / ramps 1.4? Please share how you did this.

+Peter van der Walt I tested the official fron gnea, but the motors did´n turn. I think that the problem is in the pin out of the motor signals.
I found this one that run with the motors:
https://github.com/minsk-hackerspace/lasercutter-grbl-Mega-RAMPS

@Roland_Barenbrug
In order to flash the firmware to the ramps, follow the instruction on the wiki:
https://github.com/gnea/grbl/wiki/Flashing-Grbl-to-an-Arduino
and download the firmware from:
https://github.com/minsk-hackerspace/lasercutter-grbl-Mega-RAMPS
You will need to change the config files with the correct values for your machine.

+Peter van der Walt Supporting RAMPs on grbl-Mega been buried in the to-do list for a while. If there is a decent fork that works, I can take the time to quickly review and integrate it in. Otherwise, it’ll have to wait, because I have other things on my plate at the moment.

+Peter van der Walt @Sonny_Jeon can confirm it works. Just had a little config battle as I swapped Y and Z to be able to use the dual Z header on the RAMPS board to drive both left and right side Y-axis stepper. In this case one has to disable the RESET button as this uses the same pin as the Z-EN line of the Z-axis stepper.

Me has salvado la vida! :slight_smile:

un placer.

@Roberbike que transistor y resistencias usas para hacer el PWM low? o el firm de la ramps va prehackeado?

@Jorge_Robles para controlar el diodo laser tengo un driver que compre por Ebay a un ruso.Utilizo la salida de servos D5 o D6, no lo recuerdo ahora, que me da 0 a 3,6V. Esa salida la conecto a la entrada TTL PWM de mi driver 0-5V y ajusto los amp. de salida con la pot. max.
El firm que puse ya funciona con esa salida. Solo tienes que preocuparte de los finales de carrera. Yo no lo he conseguido todavia, entre que no controlo mucho y no tengo tiempo…

Ahhn que es diodo jajajaja, no me habia dado cuenta (y mira que está en la foto) es que el rollo del transistor es para las de co2 :stuck_out_tongue:
Gracias de todas maneras

De todas maneras el que ha hecho el firmware lo utiliza en un láser de co2. Y creo que no utilizan ningún transistor ni nada parecido.