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No. 99MBC071A
7. INSPECTION AND MAINTENANCE
7.4 Troubleshooting and Remedies
The following table shows the troubleshooting and remedies on the LSM system.
Symptoms Possible causes Remedies
The LSM does not start
if the power is turned on.
The power cord is not connected. AC
power supply is off or failed.
The fuse is blown out.
Check the power cord and AC power
supply.
Replace a fuse after fixing the cause of
blowout.
Measurements are
unstable, resulting in a
poor accuracy.
Warm-up of the system is insufficient.
Measuring Unit is directly subjected to
sunlight or air flow from the air
conditioner.
Contaminated protection glass.
Vibration of workpiece.
Laser diode power is reduced.
Warm up the system at least 20 to 30
minutes.
Take measures to avoid the system
from being subjected those troubles.
Clean the glass by referring to Section
7.2. “Measuring Unit”
Set a larger number of scans.
Check the LASER EMISSION LED is
flashing. If it does, contact Mitutoyo or
the nearest sales representative.
Measuring error persists
even after calibration
Contaminated protection glass.
Clean the glass by referring to Section
7.2. “Measuring Unit”
Statistical processing
can not be achieved.
Single-run measurement,
continuous-run measurement,
or zero-run measurement has not been
performed.
“ST” command is not sent through
RS-232C.
Perform the single-run measurement,
continuous-run measurement,
or zero-run measurement.
Send the “ST” command.
The system incorrectly
operates.
The system is electrically interfered.
Make a positive grounding, and use a
shielded-wire cable for the I/O analog
interface. Lay this cable sufficiently
away from the source of interference.
The external power supply should be
drawn from a line with little electrical
interference.
Measurement does not
terminate while
is
displayed.
The number of samples in the sample
measurement is too large.
Under the use of abnormal value
eliminating function the workpiece
dimension is significantly different
from the setup value.
Stop the measurement with the
key and set a smaller number of
samples.
Check the setup value
Measurement interval
does not match the
measuring conditions.
Under the use of the abnormal value
eliminating function the workpiece
dimension is significantly different
from the setup value.
Check the setup value.
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