Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 248

5. HOW TO USE THE PROGRAM
(3) Timing chart
The following shows a timing chart after a program containing a "ZRT" command is selected.
MD0 (Operation mode selection 1)
MEND (Travel completion)
PED (Position end)
CPO (Rough match)
ZP
(Home position return completion)
Forward rotation
Servo motor speed 0 r/min
Reverse rotation
Z-phase
DOG (Proximity dog)
ST1 (Forward rotation start)
ST2 (Reverse rotation start)
The setting value of [Pr. PT08 Home position return position data] is used as the position address at the
home position return completion.
(4) Adjustment
For the dog type home position return, adjust the setting so that the Z-phase signal is always generated
during the detection of a dog. Make an adjustment so that the rear end of DOG (Proximity dog) is
positioned almost at the center between the position specified by a Z-phase signal and the position
specified by the next Z-phase signal.
The generation position of the Z-phase signal can be checked with "Position within one-revolution" of
"Status Display" on MR Configurator2.
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Acceleration time constant
Home position return speed
3 ms or shorter
ON
OFF
ON
OFF
ON
5 ms or longer
OFF
ON
OFF
Servo motor Z-phase
DOG (Proximity dog)
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Deceleration time constant
Home position shift distance
Creep speed
td
Proximity dog
0 Resolution/2
Proximity dog
ON
OFF
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Home position
Home position return position data
0