Mitsubishi Electric 800 Series Instruction Manual (Function page 170

Pr.1282 Home position return
setting method
Ignoring the home
4 (initial position (servo ON
value) position as the home
position)
Count type with front
6, 106, 206
*1
end reference
*1 Change of the speed at which the proximity dog is detected may cause fluctuations of the average home position. Consider fluctuations of the
home position to set Pr.1283.
NOTE
• Home position return automatic back-off function
The home position return starts after the transfer device goes back to the point from which the home position return is possible.
This function is enabled when a proximity dog is used for the home position return and when the current position at that start
is detected on the following places:
On the proximity dog
On the place between the proximity dog and the stroke end in the direction of travel
On the stroke end
●Operation example:
current position on the proximity dog
The current position is
moved automatically back
from the front end of the
proximity dog to be set as
the start position for the
home position return.
The servo ON position is used as the home position.
If the Pre-excitation/servo ON (LX) signal is turned ON, output shutoff is canceled and the Position
control preparation ready (RDY) signal is turned ON after 0.1 second.
The settings of the direction for home position return and home position shift distance are ignored.
Position command speed
Point table selection signal, JOG
The home position is determined based on the detection position of the front end of the proximity dog.
Deceleration starts at the front end of the proximity dog, and the position after the shift by the home
position shift distance is set as the home position.
Home position return direction
• Position pulse increasing direction: when Pr.1282 = "6" and the forward rotation command is given,
or when Pr.1282 = "106"
• Position pulse decreasing direction: when Pr.1282 = "6" and the reverse rotation command is given,
or when Pr.1282 = "206"
To input the X76 signal, set "76" in any parameter from Pr.178 to Pr.189 (Input terminal function
selection) to assign the function to a terminal.
Point table selection signal, JOG
STF
X76
Speed
0
HP1 (Home position return setting error) will be displayed in any of the following cases:
• The operation suddenly stops as the stroke end signal in the direction of travel is detected while the
position command is being created.
• After a position command is created, the Y36 signal remains OFF for 10 seconds.
Home position
return speed
X76
Proximity dog
Description
0
LX
STF
RDY
LX
ON
ON
Pr.1283
Home position
return speed
Pr.511 Home position return shifting speed
Slope set by Pr.7 Slope set by Pr.1223
Slope set by Pr.1222
Slope set by Pr.8
Proximity dog
Home position return shifting speed
Home position
Home position return start position
ON
7.3 Simple positioning function by point tables
Home position
Time
0.1s
ON
Home position shift amount
Home position
Time
7. Position Control
1
2
3
4
5
6
7
8
9
10
169