Panasonic LP-400 Series, Руководство по внешнему управлению

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Moving objects
Troubles Causes Measures
Marking cannot be done. Encoder signal is off. Check for proper connection to encoder.
Marking is sometimes
skipped.
(E800 occurs.)
Marking trigger signal is entered before
current marking is finished.
• Increase scan speed setting of laser marker.
• Decrease delay distance setting of laser
marker.
• Reduce feeder speed.
• Increase marking interval (interval between
objects on feeder).
Characters unreadable
Feed direction is not correct. Match feed direction with laser marker operation.
Speed changes at conveyor junction.
If conveyors are coupled, avoid marking near
conveyor junction.
Actual speed and preset speed for
feeding objects are different due to
slippage of objects.
Remove cause of object slippage.
Pulse setting of encoder is not correct.
Measure the number of encoder pulses and
adjust “Number of encoder pulses”.
Encoder is out of order. Check encoder for proper function.
Marking position is
unstable.
Positional misalignment is likely to
occur due to meandering motion of
conveyor.
Secure objects to prevent misalignment.
Marking character pitch
is unstable.
The line speed at the marking position
is different from the speed at the
installation site of the encoder.
Place the encoder as close as possible to the
marking position.
Decrease the encoder resolution to block the
effect of the line speed fluctuation.
Note that the minimum value of the encoder pulse
should be 10 P/mm.
Character is partially
chipped.
Obstacle hinders laser beam.
Remove obstacle between head of laser marker
and object.
Actual spacing between
characters is larger or
small than setting.
Pulse setting of encoder is not correct.
Check setting to be sure that:
• When using A phase only:
Number encoder pulses = Number of pulses/
mm x 2
• When using A and B phases:
Number encoder pulses = Number of pulses/
mm x 4
Either A or B phase signal is refused. (A
and B phase used) Check that signal is applied to A and B phase
terminals of encoder.
Measured number of encoder pulses
differs from calculated one.
Increase or decrease values in “Encoder fine
adjustment” field as appropriate.
• When the character interval is wide:
Increase the setting.
• When the character interval is narrow:
Decrease the setting.
ME-LP400V-EX-6