Panasonic LP-GS Series Serial Communication Command Manual page 161

Troubles
Character is partially
chipped.
Marking is disorder
(Characters lose shape
or not formed.)
Marking line runs over
the intended start or end
points.
When the character size
is small, the marking
characters are not
readable.
Causes
Obstacle hinders laser beam.
Laser emission port is not clean.
Head lacks fixation strength.
Constant vibration from surrounding
equipment (motor and press, etc.)
influences.
There are irregular vibrations coming
from surrounding equipment (air
cylinder and forklift, etc.).
(Marking is disturbed at irregular
intervals.)
Start and/or stop timing of feeder does
not match with marking operation.
There are noises coming from
surrounding equipment.
The setting in lasing quality parameters
does not match the other settings.
The setting conditions or font are
inadequate for the character size.
ME-LPGS-SR-5
Measures
Remove obstacle between laser emission port
and work piece.
• Clean contaminants off the laser emission
port by following the procedures described in
Setup/Maintenance Guide.
• For LP-RF series:
If contaminants persist, replace the protection
glass of the laser emission port.
• Fix head with the specified torque.
• Improve strength of head mounting.
Perform vibration prevention measures.
Disturbed at the beginning of marking:
Marking trigger signal is likely to be input
before work piece is fully stopped. Marking may
disturbed due to remaining vibration even if work
piece is in full stop.Turn the marking trigger signal
ON after vibrations are completely damped.
Disturbed at the end of marking:
Work piece is likely to start moving before
completion of marking.
Delay start timing of feeder or speed up scan
speed so that marking is finished before work
piece starts moving.
Protect laser marker against noises as follows:
• Securely ground the frame ground terminal of
laser marker or surrounding equipment.
• Isolate power and signal lines from each other
if they have been routed in parallel.
• Shield signal line.
• Isolate power supply for laser marker from
other equipment.
• Use noise cut transformer to absorb noises
from power supply.
Adjustment the lasing quality parameters such as
starting point, ending point or wait value in laser
settings.
• Use "Original 2" or "Original 5" font for the
small size characters.
• Adjust the laser power or scan speed.
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