Systems Features and Basic Operation
7.Align the plane of laser light.
a.Align the bottom of a Grade Rod to the mark on the far grade stake.
b.Check the Rod Eye Receiver.
•If the Rod Eye Receiver indicates “On Grade,” the plane of laser light is aligned at the correct slope.
•If the Rod Eye Receiver indicates the plane of laser light is too high or too low, have a second person rotate the Rotating Laser on the tripod in small steps until the Rod Eye Receiver indi- cates “On Grade.”
NOTE: If it was necessary to rotate the Rotating Laser a significant amount at the far stake, then the original reading at the near stake may be out of tolerance. Check the setting again and make minor adjustments as required.
8. Bench the machine.
NOTE: If needed, check the elevations on both the plane of laser light and the grade stake elevations by setting the bottom of the Grade Rod at any stake’s grade mark and checking the Rod Eye Receiver for the “On Grade” indication.
Benching And Operating
Before benching, the plane of laser light must be set at its proper slope. Benching is the process of setting the relationship between the Laser Sensor and the Rotating Laser or benchmark. Failure to properly bench the system before grading will result in an unacceptable grade.
The goal is to have the Laser Grading Box approximately 1/2 full during operation. If, during rough grading, a lot of material needs to be removed from a site, the Laser Sensor should be set several inches higher than finished grade. As material is removed, the Laser Sensor can be lowered and the site regraded. This may need to be repeated several times until finished grade is achieved.
Benching
1.Move the machine to an area which is close to finish grade or, using the manual controls on the control system, grade a small area close to finish grade.
NOTE: Finish grade can be checked several times during the grade process to “zero” in on final grade.
2.If equipped, set the automatic control system to manual.
3.Turn the Laser Sensor and Rotating Laser
ON.
4.If equipped, set the deadband tolerance to the minimum possible.
NOTE: Use narrow deadband for benching.
5.Adjust the height of the Laser Sensor until it is “On Grade”. For:
Telescoping Masts, loosen the locking knob on the mast and raise or lower the Laser Sensor. Tighten the locking knob when correct.
NOTE: Most materials graded must later be compacted. To compensate for the compacting distance, lower the Laser Sensor. This raises the cutting edge by the same distance. The distance the Laser Sensor is lowered depends on the material.
Benching with a Rod Eye
To bench the Laser Sensor follow the process listed below:
1.Turn on the Rotating Laser. Attach a Rod Eye to a measuring pole and turn on. Set the base of the measuring pole on the benchmark and adjust the measuring pole so the Rod Eye emits a solid “On Grade” tone (com- pensate for slab thickness and compaction if needed).