Neje 30 Watt laser to my Ramps

LightBurn Hardware Compatibility
1

Hi All, any one possibly tell me how to connect my Neje 30 Watt laser to my Ramps Board please ??? I have connected the TTL to D9 and a separate 12 volt input…the laser is on all the time and can not be controlled by the fan out put TTL 0 to 12 volts

2

I have a 30watt laser from lasertree, it needs 12v power and 5v TTL PWM and has 3 pins are you sure yours is using 12v pwm to control it. When i connected mine to a separate 12v supply my control board had its own power pack, i had to connect the grounds of the supplies together for the 5v TTL PWM output to work.

3

Thanks for your reply, I have used a lower power laser on the D9 fan connection and it worked fine…the Neje laser has 0-12 volt TTl input and I have tried using the D9 as the controller but to no avail
this is what I have found on the internet…

Solution: I added the following line of code right before the #endif // CONFIGURATION_H at to the end of the Marlin

Configuration.h 1 tab in Arduino IDE:

//Change FAN PIN to 44
#define RAMPS_D9_PIN 44 //Was 9

but havent been able to modify Marlin. cant find where to put this change !!

4

Depending on what configuration you picked in marlin you can follow the includes in boards.h, pins.h and if your are using a ramps board the the file you want is pins_ramps.h

I could point you to the file better if i knew what board you picked in the configuration.h file.

5

Hello, my board is a ramps 1.4 EFB

6

pins_RAMPS.h on line 232 be aware a little further down the same file i see a definition for pin 44 on line 294 for the case light pin but i doubt you have that enabled

7

As far as I am aware it is not enabled

8

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