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| Illustration 1 | g06069478 |
Cat® Grade Control (Cross Slope) System Components
Inclination (Main-fall) Sensor
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| Illustration 2 | g06300209 |
| (1) Inclination (Main-fall) Sensor | |
Inclination (Main-fall) Sensor measures the front to the back angle, to provide the cross slope system the pitch orientation of the machine. The Inclination Sensor is mounted on the frame rail (goose neck) of the machine.
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| Illustration 3 | g06300210 |
| (2) Blade Rotation Sensor | |
Blade Rotation Sensor measures the rotation of the blade with respect to the blade A-Frame. The Blade Rotation Sensor is mounted to the top center of the circle.
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| Illustration 4 | g06300212 |
| (3) Blade Slope Sensor | |
Blade Slope Sensor measures the actual tilt or the slope across both sides of the blade. The Blade Slope Sensor is mounted on the rear of the circle.
Implement Electronic Control Module (ECM) Controller
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| Illustration 5 | g06300213 |
| (4) Implement ECM Controller | |
The Cat® Grade Control Cross Slope system controls the cross slope from the Implement ECM. The ECM monitors the cross slope system sensors inputs to calculate the cross slope and control the blade to maintain the target slope. Refer to the Systems Operation manual of the machine for more details.
Blade Control Mode Switches (Automatic/Manual)
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| Illustration 6 | g06300214 |
| (5) RH Auto/Manual Switch | |
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| Illustration 7 | g06300215 |
| (6) LH Auto/Manual Switch | |
The Automatic/Manual switches provide the Implement ECM with an input signal, when the automatic or manual mode change is requested by the operator.
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| Illustration 8 | g06066908 |
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Right hand/Left hand Increment/Decrement switches | |
Grade Offset switches provide the Implement ECM with an input signal of the desired grade changes from the operator to lift or lower the left or right side of the blade and also the changes of the automatic blade control side (Right or Left).
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| Illustration 9 | g06066913 |
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Advanced Control Joystick (Right Hand) | |
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| Illustration 10 | g06066911 |
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Advanced Control Joystick (Left Hand) | |
Advance joysticks will provide the machine ECM with switch inputs that allow the operator to adjust the target cross slope and engage Automatic/Manual mode without moving their hands away from the Joystick for easier operation and control.
Note: All the newer models of M, M2, and M3 series motor graders will be equipped and shipped from factory with Advanced control Joystick. Advanced control Joystick option can be added to any of the M, M2, and M3 series motor grader models. Refer to Special Instruction, REHS8847, "Procedure for Installing Right-Hand and Left-Hand Advanced Control Joysticks on M Series, M Series 2, and M Series 3 Motor Graders" for part numbers and complete installation procedure.
The machine display allows the operator to interact and view information from the machine ECM, like logged and active events, diagnostic codes, view the status of system components, and some of the system parameters with regard to the Cat Grade Control System. The operator can view the desired grade and it can also be used to perform sensor calibrations. There are three types of display for the M series Motor Grader depend on machine model.
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| Illustration 11 | g06066918 |
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Messenger Display | |
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| Illustration 12 | g06066922 |
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Message Display | |
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| Illustration 13 | g06066921 |
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The Information Display | |
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| Illustration 14 | g06066927 |
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Power Module | |
The power module provides regulated and switched power supply to all the Cat Grade Control Sensors and the AccuGrade Quick Connectors.
Cat Grade Control (Cross Slope) System Description
The Cross Slope control system uses combination of angle and rotation sensors to measure the cross slope of the cutting edge of the blade accurately. All sensors value will be sent to the Implement ECM as input value over the CAN Data Link, then the Implement ECM calculate all values and sends currents to the hydraulic valve solenoids to drive and hold the cutting edge at a cross slope. The cross slope is predefined by the operator and viewed on the machine display.
Note: The AccuGrade 3D upgrade system can utilize the same Cat Grade Control (blade slope, rotation, and inclination) sensors.
When operator places the system in auto mode, the blade will be positioned to the target slope. Operator controls one end of the blade and the Cross Slope system controls the other end which was put under the automatic control. When the blade is perpendicular to the frame, zero degrees of rotation is achieved. These sensors allow an accurate slope of the blade even when the blade is rotated and the machine is not level.