First off all: Sorry for my Englisch! I am Dutch and not very good in writing Englisch.
I have a core XY printer with a 10 watt laser on it. I was using the Lichtburn software until now by using only the power connection of the laser. To increase the ligth i used the hotend fan connection from the RAMPS1.4 board.
Now the firmware is changed and the TTL is now comming from pin 44
But: the laser will not fire at all!!
What can be wrong?