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MITSUBISHI CNC
III Functional Specifications
8.1.6 Spindle Orientation
M720VW
M system
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L system
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This function stops the spindle rotation at a certain position.
When Z-phase has not yet been passed, pass Z-phase twice (excluding reciprocations within one rotation),
and then position to the orientation position.
When Z-phase has been passed already, immediately position to the orientation position.
The spindle does not rotate if Z-phase has been passed and the orientation position is already established
when orientation command is issued.
When the spindle has been rotating in the direction opposite from that of orientation rotation when the
orientation command is issued, orientation operation will be executed after decelerating to stop.
(a) Orientation
This function stops the spindle rotation at a certain position when using the digital spindle.
When the orientation command is used, the spindle will rotate several times and then stop at the
orientation point.
The orientation position differs depending on the detector.
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When the encoder orientation (PLG and external encoder/ring sensor) is used:
...At the Z-phase position
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When the magnetic sensor (proximity switch) is used:
...At the magnetic sensor installation position
(b) Multi-point orientation
This function performs orientation to a position other than the Z-phase position by inputting a shift
amount with the parameter or PLC. The shift amount is 0 to 35999. (Unit: 360°/36000=0.01°)
(Note 1) Multi-point orientation cannot be executed when using the magnetic sensor.
(Note 2) Orientation is possible only when the gear ratio is 1:1 for the PLG orientation.
(The orientation is completed at the PLG encoder's Z-phase, so when using reduction gears,
the orientation points will be generated at several points during one spindle rotation.)
(c) Orientation imposition advance output
This function turns the spindle in-position signal ON as soon as the spindle reaches within the second
in-position width. Then, the spindle 2nd in-position signal is turned ON as soon as the spindle reaches
within the in-position width.
Since orientation completion can be predicted using this function, it is possible to eliminate the
sequence delay time, etc. for tool changes and other such operations, thereby achieving a faster tact
time.
III - 106
M730VW
M750VW
M720VS
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M730VS
M750VS
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