Checking And Adjusting Calibration
Calibration should be checked from time to time.
Although the
L3
is calibrated at the factory and is an exceptionally
rugged laser, it is well worth the effort to check calibration before you
first use it (after shipping) and then from time to time to insure that you
are doing the highest quality work possible. Always check calibration if
the laser has been handled roughly.
Calibration procedure.
Note: Refer to the picture on page 2 for a diagram of the "X" and "Y" axis
directions used during this calibration procedure.
1. Start with a tripod or stand that has been leveled (using a carpenter's
level) to allow the laser to be turned to different positions with minimal
re-leveling of the level vials. Attach the laser to the tripod or stand
approximately 50 feet (15m) from a wall or other stable vertical surface.
We will call the vertical surface the target. If the target has direct
sunlight on it, you may have to shade the surface to see the laser spot
clearly.
2. Turn the entire laser so that either direction of the x-axis is aimed at
the target. Turn the laser on and push the "-" button until the rotation
stops. Precisely level the bubbles in the precision level vials.
3. With the rotation stopped, point the laser spot at the target by
manually turning the rotating head and make a mark at the beam center
on the target.
4. Return to the laser and rotate the entire unit 180 degrees so that the
opposite direction of the X-axis is aiming at the target. Carefully re-level
the bubbles in the X and Y axis precision level vials. Once again, point
the laser spot at the target by manually turning the rotating head and
mark the beam center.
5. The difference between the two marks (if any) is double the difference
between how the laser is calibrated and true level for the X-axis. Half
way between these two marks is true level. Make a long level mark at
true level. If the difference between either outer mark and true level is
within your working tolerance, go on to step 8. If not, continue with the
next step.
6. Adjust the X-axis leveling screw until the beam is on the true level
mark established in step 5. Remove the black rubber plug from the
X-axis calibration port under the laser housing (shown in the picture on
the next page). Using a 3/32" hex driver, adjust the X-axis vial until it
indicates level.
14
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