4 Operation Mode
MITSUBISHI CNC
II - 14
4.4 Manual Reference Position Return Mode
4.4.1 Outline
This mode enables a controlled axis to be returned manually to the defined position unique to the machine (reference
position).
The first reference position return after the NC power is turned ON becomes the dog mode. For the second or later
reference position return, the dog mode or high-speed return can be selected by setting a given parameter.
4.4.2 Detailed Description
Patterns of reference position return are as shown below.
Dog mode reference position return
The steps below describe what happens to the controlled axis when it returns to the reference position for the first time
with the power ON and with the machine in an "operations not ready state" (emergency stop is engaged or the servo
alarm is ON) or when the parameters are selected in the dog mode.
(1) The controlled axis is moved in the direction where the near point detection limit switch and dog approach each
other in the reference position return mode.
(2) When the limit switch kicks the dog, the controlled axis once stops with deceleration.
(3) Next, the controlled axis moves to the reference position at the approach rate set in the parameter.
(4) When it arrives at the reference position, the reference position arrival signal is output.
(5) The reference position establishment signal is output.
High-speed reference position return
If high-speed return is set in a given parameter after dog mode reference position return is executed, then high-speed
reference position return will be made.
(-)
(+)
(-)
(+)
To move in + direction
To move in – direction
Dog
Reference position
When reference position return direction is positive (+)
To move in + direction
To move in – direction
Dog
Reference position
When reference position return direction is negative (-)
Содержание E70 Series
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Страница 24: ...I SCREEN OPERATIONS ...
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Страница 440: ...II 3 1 Operation State ...
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Страница 512: ...III 1 1 Daily Maintenance and Periodic Inspection and Maintenance ...
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