What is the difference between Preset Speed and Precision Speed mode?

The preset speeds or detent settings (e.g., Speed 1, 2, 3) represent specific, predefined speed levels. The Precision Speed mode offers continuous speed control for more gradual and fluid adjustments across the speed range. While the continuous mode can approach the same performance as distinct speeds, its fluid nature means there might be slight variations compared to the fixed steps of the detent mode.