As title, can Lasercut based machines vary the power pixel by pixel from bitmap colour information to raster engrave with variable intensity to give a relief/variable burn effect in say laser ply like an Epilog can?
I understand the glass tubes have a minimal effective power, and I read that their power is varied by an analog voltage rather than PWM like the RF tubes. However, PWM at a high enough frequency and a low pass filter can effectively be a digital to analog converter, so what is there a practical difference?