Mitsubishi Melservo-J2-Super series Instruction Manual page 67

4. OPERATION AND FUNCTIONS
(3) About proximity dog type home position return using rotary encoder
Serial I/F General-purpose pulse output
The home position using a rotary encoder as a full closed encoder is as described below. It is the
position per motor encoder resolution, starting at the position where the Z phase of the full closed
encoder is passed through first after power-on of the servo amplifier.
Full closed
ON
encoder Z-
OFF
phase signal
Home position
reference position
Machine position
[Precautions]
Precautions for passage of Z phase
The home position reference position is set relative to the Z phase position of the full closed encoder
that is passed through first after power-on of the servo amplifier.
In Case A and Case B where the power-on position differs as shown below, the power-on position must
be noted since the axis cannot stop at the same home position return position.
ON
Proximity dog
OFF
signal
Full closed
ON
encoder Z-
OFF
phase signal
Case
Home position
reference
position
Home position
return
operation
Case
Home position
reference
position
Home position
return
operation
Equivalent to one motor encoder revolution
Home position reference is position per
motor encoder resolution relative to Z-phase
Servo amplifier signal of full closed encoder that was passed
power-on position through first after power-on of servo
amplifier.
Equivalent to one motor encoder revolution
Home position return speed
Servo amplifier
power-on position
Servo amplifier
power-on position
Creep speed
Equivalent to one motor encoder revolution
Home position
Creep speed
return speed
4 - 12
Home position
Home position
Home position