Mitsubishi Electric 800 Series Instruction Manual (Function page 169

4.
Turn ON the start signal (STF or STR).
• Home position return is performed according to the settings.
NOTE
• The setting values of Pr.7 and Pr.8 are used as acceleration/deceleration time.
 Selecting the home position return method (Pr.511, Pr.1282, Pr.1283,
Pr.1285, Pr.1286)
Pr.1282 Home position return
setting method
2 Data set type
3, 103, 203 Stopper type
168
7. Position Control
7.3 Simple positioning function by point tables
After home position return is started, the In-position (Y36) signal is turned ON when the droop pulses
(after electronic gear) are equal to or less than the setting value of Pr.426 (In-position width)). The
position command value when the Y36 signal is turned ON is set as the home position. The settings
of the direction for home position return and home position shift distance are ignored.
HP1 (Home position return setting error) will be displayed if the Y36 signal remains OFF for 10
seconds after the home position return is started.
Position command speed
0
Droop pulse (after electronic gear)
0
Point table selection signal, JOG
LX
STF
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 speed 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) reaches the in-
position width set in Pr.426 or less, the home position return is completed.
Home position return direction
• Position pulse increasing direction: when Pr.1282 = "3" and the forward rotation command is given,
or when Pr.1282 = "103"
• Position pulse decreasing direction: when Pr.1282 = "3" and the reverse rotation command is given,
or when Pr.1282 = "203"
HP1 (Home position return setting error) will be displayed in any of the following cases:
• Pressing does not last for the time period set in Pr.1290 Home position return stopper waiting
time.
• After a position command is created, the Y36 signal remains OFF for 10 seconds.
• The home position return is started while the stroke end signal in the direction of travel is detected.
• The operation suddenly stops as the stroke end signal in the direction of travel is detected while the
position command is being created.
Torque limit level
Position command speed
0
Torque limit
Point table selection signal, JOG
LX
STF
Description
Home position
Normal
Pressing confirmation level (Pr.1289)
(Pr.22)
(Pr.7)
Home position
Acceleration time
return speed (Pr.1283)
First positioning acceleration time (Pr.1222)
Home position
return stopper
0.5s waiting time (Pr.1290)
Pressing confirmed
Time
In-position width (Pr.426)
In-position width (Pr.426)
Normal
(Pr.22)
Home position
shift amount
Home position
Time
Home position return
shifting speed
(Pr.511)
First positioning
deceleration time (Pr.1223)