The attached is what I used for above examples. If you see the same thing on-screen, and in the G-Code viewer then the issue is not in T2Laser but something with your system.
If it doesn't look like my example above then likely your power settings are wrong, check they are 0 to 255.
If it looks correct but doesn't work, then it suggests you aren't getting PWM laser control. Does your system have the L2 board?
I have not personally confirmed PWM capability on L2 but was planning to do so when I had time. Maybe someone else can confirm. J-Tech Grbl is 1kHz frequency, the LaserInk uses standard Grbl PWM frequency of 7.8kHz, so perhaps give that firmware a try? The higher frequency may work better.
- Zax