Mitsubishi Electric MELSERVO MR-J4-03A6-RJ, Instruction Manual

Page: 195 / 610

4. HOW TO USE THE POINT TABLE
4 - 68
4.4.14 Automatic positioning to home position function
POINT
The automatic positioning to the home position cannot be performed from
outside the setting range of position data. In this case, perform the home
position return again using the home position return.
After power-on, if the home position return is performed again after the home position return is performed to
define the home position, this function enables automatic positioning to the home position rapidly. For the
absolute position detection system, the home position return is unnecessary after the power-on.
When the automatic positioning to the home position is performed at home position return incompletion, [AL.
90.1] will occur.
After the power-on, perform the home position return in advance.
Set input devices and parameters as follows.
Item Used device/parameter Setting
Home position return mode
selection
MD0 (Operation mode selection 1) Switch on MD0.
DI0 (Point table No. selection 1) to
DI7 (Point table No. selection 8)
Switch off DI0 to DI7.
Home position return speed [Pr. PT05]
Set the servo motor speed to travel to the
home position.
Home position return
acceleration/deceleration time
constant
Point table No. 1
Use the acceleration/deceleration time
constant of point table No. 1.
Home position return
direction
[Pr. PT04] Set the rotation direction in degrees.
Set the home position return speed of the automatic positioning to home position function with [Pr. PT05].
The data of point table No. 1 is used for acceleration/deceleration time constants. Switching on ST2
(Reverse rotation start) enables high-speed automatic return.
Set the rotation direction at the time of degree unit setting with home position return direction of [Pr. PT04].
Deceleration time
constant
Home position
return speed
Acceleration time
constant
3 ms or shorter
5 ms or longer
Servo motor speed
Forward rotation
0 r/min
Reverse rotation
ON
OFF
ON
OFF
ST1 (Forward rotation start)
ST2 (Reverse rotation start)
ON
OFF
MD0 (Operation mode selection 1)
Home position
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