Mitsubishi Electric FR-A820-00046 Instruction Manual page 342

Position control under vector control and PM sensorless vector control
Position command
Position feed length
Fig. 5-62:
● Set "0" as the dwell time to perform variable speed operation.
Return to home position during point table positioning
● Home position return is performed to match the command coordinates with the machine coor-
dinates.
● The returned home position can be set as point 0, and positioning operation is available using this.
● Home position return procedure
Set parameters related to home position return.
– Set the home position return method (Pr. 1282).
– Set the speed for home position return operation (Pr. 1283).
– Set the creep speed for home position return operation (Pr. 1284).
– Set the home position return shift amount if necessary (Pr. 1286 × 10000 + Pr. 1285).
– Set the post proximity dog travel distance if necessary (Pr. 1288 × 10000 + Pr. 1287).
Turn OFF all point table selections.
– Turn OFF all RH, RM, RL and REX signals.
Turn ON the Pre-excitation/servo ON (LX) signal.
Turn ON the start signal (STF or STR).
– Home position return is performed according to the settings.
NOTES The setting values of the point table 1 are used as acceleration/deceleration time.
After turning ON the start signal, only the setting values of Pr. 1283 "Home position return speed"
or Pr. 1284 "Home position return creep speed" can be changed.
5 - 162
Acceleration time (1 s)
of point table 1
speed
30 Hz
(Pr. 4)
0
50000
0
Servo ON
(LX)
STF
ON
RH
RM
RL
Positioning operation by point tables
Deceleration time (1 s)
of point table 1
20 Hz
(Pr. 5)
10 Hz
(Pr. 6)
30000 20000
50000 80000 100000
ON
ON
Parameters
5 Hz
(Pr. 24)
Time
60000
160000
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