CPC A01D 75/30 (2013.01) [A01D 34/006 (2013.01); A01D 34/44 (2013.01); A01D 34/54 (2013.01); A01D 69/03 (2013.01); A01D 2034/645 (2013.01); A01D 34/74 (2013.01)] | 10 Claims |
1. An adjustable lift rate system, comprising:
a riding greensmower having a lift and lower circuit including a plurality of hydraulic lift cylinders to lift and lower a first row of grass mowing units followed by a second row of grass mowing units;
a bypass around the plurality of hydraulic lift cylinders responsive to a proportional solenoid valve;
an operator control on the riding greensmower for commanding the proportional solenoid valve to divert hydraulic fluid from the plurality of hydraulic lift cylinders to the bypass to adjust a lift rate and a lower rate of the first row and the second row of grass mowing units; and
a controller that provides a constant starting current, a ramp of increasing current, and a constant ending current, thereby automatically slowing the lift rate as the grass mowing units approach a top of a lift.
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