SM-131-006.pdf - 第284页

Device Name Chip Mounter Block Name Page No. Unit Name Revision Model Item GXH-1 Chapter 17 Servo Alarm 1. Troubleshooting on Servo Alarm Alarm Codes Contents of Servo Alarm Cause and Remedy (Cause 5) Servo motor shaft w…

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Device
Name
Chip Mounter
Block Name
Page No.
Unit Name
Revision
Model
Item
GXH-1
Chapter 17 Servo Alarm
1. Troubleshooting on Servo Alarm
Alarm
Codes
Contents of
Servo Alarm
Cause and Remedy
(Cause 3) Servo system is instable and hunting.
(Remedy 1) Repeat acceleration/deceleration to execute auto
tuning.
(Remedy 2) Change auto tuning response setting.
(Remedy 3) Set auto tuning to OFF and make gain
adjustment manually.
(Cause 4) Encoder faulty.
[Checking Method]: When the servo motor shaft is rotated
with the servo off, the cumulative
feedback pulses do not vary in
proportion to the rotary angle of the
shaft but the indication skips or
returns midway.
(Remedy) Change the servo motor.
Droop pulse value of the deviation counter exceeded the
parameter No. 31 setting value (initial value: 2 revolutions).
(Cause 1) Acceleration/deceleration time constant is too small.
(Remedy) Increase the acceleration/deceleration time
constant.
(Cause 2) Torque limit value is too small.
(Remedy) Increase the torque limit value.
(Cause 3) Motor cannot be started due to torque shortage
caused by power supply voltage drop.
(Remedy 1) Review the power supply capacity.
(Remedy 2) Use servo motor which provides larger output.
52 Error excessive
(Cause 4) Position control gain 1 (parameter No.13) value is
small.
(Remedy) Increase set value and adjust to ensure proper
operation.
17-22
0506-001
Device
Name
Chip Mounter
Block Name
Page No.
Unit Name
Revision
Model
Item
GXH-1
Chapter 17 Servo Alarm
1. Troubleshooting on Servo Alarm
Alarm
Codes
Contents of
Servo Alarm
Cause and Remedy
(Cause 5) Servo motor shaft was rotated by external force.
(Remedy 1) When torque is limited, increase the limit value.
(Remedy 2) Reduce load.
(Remedy 3) Use servo motor that provides larger output.
(Cause 6) Machine struck something.
(Remedy 1) Review operation pattern.
(Remedy 2) Install limit switches.
(Cause 7) Encoder faulty
(Remedy) Change the servo motor.
(Cause 8) Wrong connection of servo motor.
Servo amplifier
′s output terminals U, V, and W do
not match servo motor
′s input terminals U, V, and
W.
(Remedy) Connect correctly.
CPU, parts faulty 88 Watchdog
(Cause 1) Fault of parts in servo amplifier
[Checking Method]: Alarm (88) occurs if power is
switched on after disconnection of all
cable but the control circuit power
supply cable.
(Remedy) Change servo amplifier.
Serial communication error occurred between servo
amplifier and communication device (e.g. personal
computer).
8E Serial
communication
error
(Cause 1) Communication cable fault (Open cable or short
circuit)
(Remedy) Repair or change the cable.
17-23
0506-001
Device
Name
Chip Mounter
Block Name
Page No.
Unit Name
Revision
Model
Item
GXH-1
Chapter 17 Servo Alarm
1. Troubleshooting on Servo Alarm
Alarm
Codes
Contents of
Servo Alarm
Cause and Remedy
Absolute position detection system battery voltage is low.
(Cause 1) Battery cable is open.
(Remedy) Repair cable or changed.
92 Open battery
cable warning
(Cause 2) Battery voltage dropped to 2.8 V or less.
(Remedy) Change battery.
Home position return could not be made in the precise
position.
(Cause 1) Droop pulses remaining are greater than the in-
position range setting.
(Remedy) Remove the cause of droop pulse occurrence.
(Cause 2) Home position return was executed during
operation command.
(Remedy) Reduce creep speed.
96 Home position
setting warning
(Cause 3) Creep speed high.
(Remedy) Reduce creep speed.
Voltage of battery for absolute position detection system
reduced.
9F Battery warning
(Cause 1) Battery voltage fell to 3.2 V or less.
(Remedy) Change the battery.
17-24
0506-001