3.7 | Cylinder Ratio Calibration

Overview 
 Cylinder Ratio Calibration compensates for differences in implement movement speeds between opposing control directions. Hydraulic systems rarely move at identical speeds in both directions. Differences in cylinder geometry, implement weight, hydraulic flow characteristics, machine design and gravity can all influence the speed at which the implement moves. 
 For elevation control, the implement may raise more slowly than it lowers due to implement weight and hydraulic loading. 
 For cross-slope control, left and right tilt movements may also occur at slightly different rates due to cylinder geometry and hydraulic system characteristics. 
 Cylinder Ratio Calibration measures the time taken to move the implement through its full range of motion in each direction and automatically calculates a correction ratio used by Automatic Control. 
 Calibration Procedure 
 Elevation (Raise / Lower) 
 
 
 
Position the implement at its lowest operating position. 
 Press  Start in the  Up section. 
 Immediately raise the implement at full manual control speed until maximum height is reached. 
 Press  Stop when maximum height is reached. 
 Press  Start in the  Down section.
 
 
 Immediately lower the implement at full manual control speed until minimum height is reached - do not make contact with the ground, stop the implement before it does. 
 Press Stop when minimum height is reached. 
 Press Calc  to generate the Elevation Cylinder Ratio. 
 
 
 Cross-Slope (Left / Right) 
 
 Position the implement at one end of its available tilt range. 
 Press Start Left  or Start Right  as appropriate. 
 Immediately move the implement at full manual control speed until the opposite end of travel is reached. 
 Press Stop when the limit of travel is reached. 
 Repeat for the opposite direction. 
 Press Calc  to generate the Cross-Slope Cylinder Ratio. 
 
 
 
 Verification 
 After calibration: 
 
 Implement movements should respond consistently in both directions during Automatic Control. 
 Neither direction should appear noticeably slower or more aggressive than the opposite direction. 
 If hydraulic components, cylinders, valves or plumbing are modified, cylinder calibration should be repeated. 
 
 Continue to  3.8 | Tuning Automatic Implement Control .