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Quick Guide to Precision Laser Scan Micrometers
Measuring Instruments
Compatibility Re-Assembly after Removal from the Base
Your Laser Scan Micrometer has been adjusted together with the ID Unit, Observe the following limits when re-assembling the emission unit and
which is supplied with the measuring unit. The ID Unit, which has the same reception unit to minimize measurement errors due to
code number and the same serial number as the measuring unit, must be misalignment of the laser's optical axis with the reception unit.
installed in the display unit. This means that if the ID Unit is replaced the
measuring unit can be connected to another corresponding display unit. Alignment within the horizontal plane
a. Offset between reference lines C and D:
The Workpiece and Measuring Conditions X (in the transverse direction)
Depending on whether the laser is visible or invisible, the workpiece shape, Reference line D
and the surface roughness, measurement errors may result. If this is the case, Reference line C
perform calibration with a master workpiece which has dimensions, shape,
and surface roughness similar to the actual workpiece to be measured. X
If measurement values show a large degree of dispersion due to the
measuring conditions, increase the number of scans for averaging to improve
the measurement accuracy.
Electrical Interference b. Angle between reference lines C and D: x (angle)
To avoid operational errors, do not route the signal cable and relay cable Reference line D
of the Laser Scan Micrometer alongside a high-voltage line or other Reference line C
cable capable of inducing noise current in nearby conductors. Ground all
appropriate units and cable shields.
Connection to a Computer x
If the Laser Scan Micrometer is to be connected to an external personal Alignment within the vertical plane
computer via the RS-232C interface, ensure that the cable connections
conform to the specification.
G Laser Safety c. Offset between reference planes A and B: Y (in height)
Mitutoyo Laser Scan Micrometers use a low-power visible laser for Reference plane B
measurement. The laser is a CLASS 2 EN/IEC60825-1 (2007) device. Warning Reference plane A
and explanation labels, as shown right, are attached to the Laser Scan Y
Micrometers as is appropriate.
d. Angle between reference planes A and B: y (angle)
Reference plane B
Reference plane A
y
l Allowable limits of optical axis misalignment
Model Distance between X and Y x and y
Emission Unit
LSM-501S within 0.5 mm (.02") within 0.4 (7mrad)
LSM-503S and Reception Unit within 0.5 mm (.02") within 0.3 (5.2mrad)
LSM-506S 68 mm ( 2.68") or less within 1 mm (.04") within 0.4 (7mrad)
LSM-512S 100 mm ( 3.94") or less within 1 mm (.04") within 0.16 (2.8mrad)
LSM-516S 130 mm ( 5.12") or less within 1 mm (.04") within 0.2 (3.5mrad)
350 mm (13.78") or less within 1 mm (.04") within 0.08 (1.4mrad)
273 mm (10.75") or less within 1 mm (.04") within 0.18 (3.6mrad)
700 mm (27.56") or less within 1 mm (.04") within 0.08 (1.4mrad)
321 mm (12.64") or less within 1 mm (.04") within 0.09 (1.6mrad)
700 mm (27.56") or less
800 mm (31.50") or less
G-25
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