Laser Maintenance; Field Calibration Check; Level Calibration Check - DeWalt DW074 Instruction Manual

5. Use the wall mount measuring scale (CC) to pinpoint your
mark.
NOTE: It may be helpful to turn the power on and turn the
rotary head so that it puts a dot on one of the laser scales. The
D WALT target card is marked at 1-1/2" (38 mm), therefore, it
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may be easiest to set the offset of the laser to 1-1/2" (38 mm)
below the track.
6. Once you have positioned the laser at the desired height,
tighten the locking knob (GG) to maintain this position.

LASER MAINTENANCE

• Under some conditions, the glass lens inside the rotary head
may collect some dirt or debris. This will affect beam quality and
operating range. The lens should be cleaned with a cotton swab
moistened with water as shown in Figure 13.
• The flexible rubber shield can be
cleaned with a wet lint-free cloth
such as a cotton cloth. USE
WATER ONLY — DO NOT use
cleansers or solvents. Allow the
unit to air dry before storing.
• To maintain the accuracy of your
work, check the calibration of
the laser often. Refer to Field
Calibration Check.
• Calibration checks and other maintenance repairs can be
performed by D WALT service centers. Two free calibration
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checks are included under the D
Con tract.
• When the laser is not in use, store it in the kit box provided.
FIG. 13
WALT One Year Free Service
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• Do not store your laser in the kit box if the laser is wet. Dry
exterior parts with a soft, dry cloth and allow the laser to air dry.
• Do not store your laser at temperatures below 0˚F (-18˚C) or
above 105˚F (41˚C).
WARNING: Never use solvents or other harsh chemicals for
cleaning the non-metallic parts of the tool. These chemicals may
weaken the materials used in these parts. Use a cloth dampened
only with water and mild soap. Never let any liquid get inside the
unit; never immerse any part of the unit into a liquid. Never use
compressed air to clean the laser.
Field Calibration Check (Fig. 14–16)
Field calibration checks should be done frequently. This section
provides instructions for performing simple field calibration checks
of your D WALT Rotary Laser. Field calibration checks do not
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calibrate the laser. That is, these checks do not correct errors in
the leveling or plumbing capability of the laser. Instead, the checks
indicate whether or not the laser is providing a correct level and
plumb line. These checks cannot take the place of professional
calibration performed by a D WALT service center.
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LEVEL CALIBRATION CHECK (X-AXIS)
1. Set up a tripod between two walls that
are at least 50 feet (15.3 m) apart.
The exact location of the tripod is not
critical.
2. Mount the laser unit on the tripod so
that the X-axis points directly toward
one of the walls.
3. Turn the laser unit on and allow it to
self-level.
4. Mark and measure points A and B on the walls as shown in
Figure 15.
FIG. 14 Y-AXIS
X-AXIS