
B–63173EN–1/01
2. PREPARATIONS FOR OPERATION
122
2051 Velocity control observer
[Data type] Word axis
[Valid data range] 0 to 32767
[Setting value] 3329
When using the velocity loop observer (by setting bit 2 of parameter No.
2003 to 1), set 510 in this parameter.
2103 Retraction distance upon the detection of an abnormal load
[Data type] Word axis
[Unit of data] Detection unit
[Valid data range] 0 to 32767
This parameter specifies the amount by which the tool is retracted, by
reversing the motor, if an abnormal load is detected. When the motor is
rotating at low speed, however, the tool may be retracted too far. To
prevent this, the motor is stopped, instead of being reversed, upon the
detection of an abnormal load while the specified feedrate is less than the
value listed in the table below.
When this parameter is set to value A, the detection of an abnormal load
causes the tool to be retracted in the reverse direction by an amount A,
then stop , if the specified feedrate is equal to or greater than the value
listed below, for each detection unit.
Detection unit Feedrate
1
0.1
A / 8 mm/ min
A / 80 mm/ min
When this parameter is set to 0, the motor stops immediately upon the
detection of abnormal load.
2104 Threshold for abnormal load detection alarm
[Data type] Word axis
[Unit of data] Torque command unit (Refer to the digital servo operator’s manual for
details.)
[Valid data range] 0 to 7282
(The maximum motor torque is 7282, regardless of the motor type.)
This parameter specifies the threshold load torque at which an abnormal
load detection alarm is issued.
Monitor the load torque by setting bit 5 of parameter No. 2015 to 1 then,
for this parameter (No. 2104), set a value larger than the maximum
monitored torque. An output of 4.4 V is equivalent to 7282 in the units of
this parameter.