Over travel/extra travel

Min Power is effectively cornering power, but it’s controlled by a setting called ‘Start Speed’ in the controller (default is 10mm/sec, but some companies change that).

When the laser is moving at or below the ‘Start Speed’, Min Power is used. As it ramps up to the requested speed (if higher than Start Speed) it ramps power up to Max Power.

When raster scanning horizontally or vertically, the controller automatically inserts extra moves that overshoot the cut, so it can ramp up to the requested speed before firing the laser, so Max Power is effectively the only value used. When doing cuts or vector marking, the auto-overscan doesn’t happen, and Min Power comes into play.

Min Power is also used for grayscale - power output is ramped between Min & Max for shades from white to black in the source image.

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