If it does affect cutting, how?
PWM is how the controller drives the power output of the laser, so if you choose a power setting that’s not 0% or 100%, it’s using PWM.
There’s a different thing called velocity power ramping that you might mean, and that’s where the controller adjusts the power output based on the current speed. It’s usually not used when scanning or cutting, but when surface marking along a vector path - the controller lowers the power as you go through corners so they don’t burn.
Very little unless you have an RF excited tube. It doesn’t seem to have any real effect at all with glass tubes.
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