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SMC Networks LECSB2-T Series User Manual

SMC Networks LECSB2-T Series
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8. TROUBLESHOOTING
8 - 77
Description
Cause
Checkpoint
Action
Home position deviates at
home position return.
For the dog type home
position return, the point which
the dog turns off and the point
which Zphase pulse is
detected (CR input position)
are too close.
Check if a fixed amount (in
one revolution) deviates.
Adjust the dog position.
The in-position range is too
large.
Check the setting of the
inposition range in [Pr.
PA10].
Set a narrower in-position range.
The proximity dog switch is
failure. Or mounting proximity
dog switch is incomplete.
Check if the proximity dog
signal is inputted correctly.
Repair or replace the proximity
dog switch. Adjust the mounting of
the proximity dog switch.
The program on the controller
side is incorrect.
Check the program on the
controller side such as home
position address settings or
sequence programs.
Review the programs on the
controller side.
The position deviates during
operation after home position
return
The position command and
actual machine position are
different.
Check that "cumulative
feedback
pulses × travel distance per
pulse" matches the actual
machine position.
Check if "cumulative feedback
pulses × feed length
multiplication" matches the
actual machine position.
Review the position command
and electronic gear setting.
An alarm or warning is
occurring.
Check if an alarm or warning
is occurring.
Check the content of the alarm/
warning and remove its cause.
The servo gain is low. Or the
response of auto tuning is
low.
Check if the trouble is solved
by increasing auto tuning
response ([Pr. PA09]).
Adjust gains.
The reduction ratio is not
calculated correctly for the
geared servo motor.
Check the following settings.
Number of command input
pulses per revolution ([Pr.
PA05]) or
electronic gear ([Pr. PA06]
and [Pr. PA07])
Review the calculation of the
reduction ratio.
The in-position range is too
large.
Check the setting of the
inposition range in [Pr. PA10].
Set a narrower in-position range.
The command pulses were
miscounted due to noise.
Check that the command
value of the controller and the
number of cumulative
command pulses are
matched.
Please take countermeasures
against noise for the command
cable.
Review the shield procedure of
the command cable.
The cable for a command is
connected loosely or
disconnected.
Check that the command
value of
the controller and the number
of cumulative command
pulses are matched.
Repair the cable for a command.

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SMC Networks LECSB2-T Series Specifications

General IconGeneral
BrandSMC Networks
ModelLECSB2-T Series
CategoryDC Drives
LanguageEnglish