Mitsubishi Electric FR-A800 Series Instruction Manual page 313

Pr.1282 Home position return
setting
Stopper type
3
Vector Vector Vector
PM PM PM
Ignoring the home
position (servo ON
position as the home
4 (initial
position)
value)
Vector Vector Vector
PM PM PM
Dog type back end
reference
5
Vector Vector Vector
PM PM PM
312
5. PARAMETERS
5.5 Position control under vector control and PM sensorless vector control
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method
A workpiece is pressed to a mechanical stopper, and the position where it is stopped is set as the
home position.
Pressing is confirmed when the estimated speed value remains equal to or lower than the value set in
Pr.865 Low speed detection for 0.5 second during the torque limit operation. (While the stopper-type
home position is performed, Pr.1289 Home position return stopper torque is applied.) After Pr.1290
Home position return stopper waiting time has passed after pressing is confirmed, the home
position is shifted by the home position shift distance (Pr.1285 and Pr.1286). After a position
command is created and the absolute value of the droop pulse (after electronic gear) falls below the
in-position width, the home position return is completed.
Torque limit level
Position command
Point table selection
Servo-ON (LX)
The servo ON position is used as the home position.
Position command speed
Point table selection signal
Deceleration starts at the front end of the proximity dog. After the back end is passed, the position is
shifted by the post-dog travel distance and home position shift amount. The position after the shifts is
set as the home position.
Set pulses required for deceleration from the creep speed or more as the total of the post-dog travel
distance and home position shift amount.
Position command
Point table selection
Servo-ON (LX)
Start signal (STF)
search engine
Description
Normal
Pressing confirmation level (Pr.1289)
(Pr.22)
Point table 1
Home position
acceleration time
speed
0
Point table 1 acceleration time
0.5s
Torque limit
signal
Start signal
0
LX
STF
RDY
Point table 1
acceleration time Home position
return speed
speed
0
Proximity dog
signal (X76)
signal
Normal
(Pr.22)
return speed
Home position
shift amount
Creep speed
Pr.1290
Pressing confirmed
Point table 1
deceleration time
Creep speed
Proximity dog
Home position
Time
Point table 1
deceleration time
Home position
Time
Post-dog
travel distance
+
Home position
shift amount
Home
position
Time