When I set the min it sets the max power to the same and vice versa

[Stroonzo (Jeff)]

Your XCarve machine is controlled by GRBL (GCode based controller).

Laser power MIN / MAX for other controller like the LPC1768

GCode controllers don’t have any way to send this option. A GCode controller manages its own acceleration and movement speed, and when it slows for corners, it manages the power ramping itself. GRBL LPC has a firmware setting for the minimum PWM output value, but that can’t be changed while streaming a job.