
2.PREAPARATIONS FOR OPERATION B-63323EN-1/03
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1996 Retract amount on detecting an irregular load
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If an abnormal load is detected, the direction of the motor rotation can be reversed.
This parameter sets the amount of reverse motor rotation. When a specified
feedrate is not higher than the feedrate listed below, and so the motor turns at a
low speed, the motor stops immediately without reversing the motor rotation.
This is to prevent the motor from turning in the reverse direction excessively.
Let A be this parameter value. When the feedrate is higher than the feedrate
indicated below in the detection unit used, the motor turns in the reverse direction
by A from the point at which an abnormal load is detected, then stops.
Detection unit Feedrate
10
1
0.1
0.01
0.001
A / 0.8 mm/ min
A / 8 mm/min
A / 80 mm/min
A / 800 mm/min
A / 8000 mm/ min
If this parameter is set to 0, the motor rotation will not reversed, but it will stop
immediately when an abnormal load is detected.
See “AC Servo Motor α series Parameter Manual (B-65150E)” for details.
1997 Threshold value for the detection of an irregular load
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5
The irregular load alarm is generated when the load for a servo axis exceeds this
value.
The set value should be bigger than the maximum value of the load torque
observed in the setting of the paramete TDO (no.1957#5) =1. The set value 7282
corresponds 4.4V of the observed value.
See “AC Servo Motor α series Parameter Manual (B-65150E)” for details.