Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 64

■Method -7 and -39 (count type front end reference homing)
This homing method depends on the timing of reading DOG (Proximity dog) that has detected the front end of
the proximity dog. Therefore, when the creep speed is set to 100 r/min and homing is performed, the home
position has the following error.
± (Encoder resolution)  100/65536 [pulse]
The error in the home position becomes larger as the homing speed increases.
The following figure shows the operation of Homing method -7. The homing direction of Homing method -39 is opposite to that
of Homing method -7.
Statusword bit 10
Target reached
Statusword bit 12
Homing attained
Servo motor speed
DOG (Proximity dog)
Controlword bit 4
Homing operation start
• When homing is started from the proximity dog
Servo motor speed
The homing start position is automatically moved back to the position
just before the proximity dog, and homing starts from here.
• When the servo motor returns at the stroke end
Servo motor speed
Homing starts from here.
*1 This cannot be used with the software limit.
2 CONTROL MODE
62
2.1 Control mode [G] [WG]
ON
OFF
ON
OFF
Acceleration time
Homing speed
constant
Forward
rotation
0 r/min
3 ms or shorter
Reverse
rotation
ON
OFF
ON
OFF
Homing direction
0 r/min
Reverse
rotation
Homing direction
Forward
Homing start position
rotation
0 r/min
Reverse
rotation
Deceleration time
constant
Proximity dog
Homing start position
Proximity dog
Travel distance after proximity dog
+
home position shift distance
Creep speed
Homing position data
Proximity dog
*1
Stroke end