Introduction
The AccuGradetm Site Reference System (SRS) and the AccuGrade Laser Reference System (LRS) are high technology earthmoving tools. The SRS and LRS allow operators to trench with less dependence upon the use of traditional stakes, stringers, or grade checkers. The use of advanced cylinder sensing technology, machine mounted components, and an on-board display allows the AccuGrade trenching system to provide precise information in order to achieve accurate bucket depth and bucket position.
Traditional Trenching
With traditional trenching, depth information is typically provided by engineers via a wooden stake in the ground with elevation markings. The grade stakes are manually placed by the engineers. Engineers use either conventional survey methods, lasers, or global positioning equipment in order to set the grade stakes. The machine operator then digs the trench using hand and eye coordination coupled with feedback from a grade checker along the trench.
AccuGrade Trenching
Setup and operation is easy with the AccuGrade Site Reference System for the BHL. On-board sensors calculate the position of the teeth of the backhoe bucket relative to the machine position and a known reference point on the job site.
Setup and operation is easy with the AccuGrade LRS. The LRS utilizes a laser transmitter that is strategically placed in the work area. The LRS transmitter is mounted on a tripod. The LRS transmitter emits a thin beam of light that rotates 360°. The transmitter creates a grade reference over the work area. Grade information is transferred to the machine via the laser beam. A digital laser receiver is mounted on the machine. The digital laser receiver is mounted on an electronic telescopic mast. The digital laser receiver detects the elevation of the laser beam and the digital laser receiver sends the information to the "Electronic Control Module" (ECM).
Note: A laser transmitter is required in order to operate the Laser Reference System. The laser transmitter is not included with the Laser Reference System. Caterpillar recommends the use of a laser transmitter with the following features:
- "Automatic Self-Leveling Mode"
- 600 rpm minimum rotational speed
- "Automatic Out of Level Shutoff"
Read the operator manual and follow the operator manual that is supplied with the laser transmitter.
Bucket position is displayed relative to an operator established grade line that is shown on display.
The SRS and LRS provide the operator with the ability to monitor the trench depth during operation.
System Components
The AccuGrade systems for the BHL utilize a number of onboard devices. The onboard devices are used in order to calculate the position of the teeth of the backhoe bucket relative to the machine position and a known reference point. The results of the position are shown on the "Display".
- Display
- Machine ECM (A4:M1)
- Position Sensing Cylinders
- Swing Sensor
- Inclinometer
- Cable Harnesses
- Laser Receiver (LRS only)
- Electronic Mast (LRS only)
- Power Supply Module (LRS only)
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| Illustration 1 | g01438468 |
Display (10 - 14) Status Lights (15) LCD Screen (16) Cursor Up or Cursor Left Button (17) Cursor Down or Cursor Right Button (18) Return to Previous Screen Button (19) Home (Main Menu) Button (20) "OK" (Enter) Button | |