Patent ID: 7954308

Claim:
A frequency of clip adjustment system for a reel mower cutting unit, comprising: an electric reel motor attached to the reel mower cutting unit for rotating a cutting reel at a plurality of different rotational speeds; an alternator rotatably driven by an internal combustion engine and connected to a voltage bus to provide a voltage based on the speed of the engine; a user interface having a plurality of frequency of clip settings, each setting corresponding to a voltage output; and a reel motor controller connected to the voltage bus and reading the voltage provided by the alternator, connected to the user interface and reading the voltage from the user interface, and connected to the electric reel motor and providing a rotational speed to the electric reel motor based on the alternator voltage, voltage output from the user interface, an engine to traction roller ratio, a traction roller circumference and number of blades of the cutting reel.