Trimble Grade Control System GCS900

Adjust Blade and Check Laser Strike

Adjust the cross slope of the blade so that the cutting edge is parallel to the laser plane.

Press and hold Bench Laser from any guidance screen.

Is the laser strike registered?

If not registered, describe the issue and actions taken.

Ask site supervisor to reposition the laser transmitter if necessary.

Measure the cutting edge height to the center of the bolt holes

Blade Wear Compensation Settings

Press M from any guidance screen

Edit the Cutting edge height field if required

Confirm or exit without saving changes

Ensure the machine is stationary and the cutting edge is fixed

Check that the current coordinates (easting, northing, and elevation) of the cutting edge focus point are displayed on the guidance screen

Are you using GNSS for guidance?

Select Fine accuracy mode if using GNSS

Move the machine at least 5 m (16.4 ft) with the blade in the position it will be checked in

Position the cutting edge focus point on the control point and roll the blade so that the mast or masts are perpendicular to the wheelbase

Check the type of mast installed

Ensure power supply to the electric mast is active

Verify the electric mast is extending and retracting properly

Check for any error messages on the control panel

Inspect the manual mast for any physical damage

Ensure the manual mast is securely locked in place

Test the manual mast for smooth operation

Test Surface Preparation and Comparison

Cut a short stretch of test surface at the target slope with a known elevation offset, preferably zero.

Measure the slope of the test surface with a calibrated digital level.

Is the measured slope equal to the target slope?

Measure the elevation of the edge of the test surface under the lift sensor, if required.

Is the measured elevation equal to the design elevation?