B–63172EN/01
5. REFERENCE POSITION
NC FUNCTION
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Positioning to the reference position can be done by manual operation.
With jogging mode (JOG), manual reference position return (ZRN)
signals, and signal for selecting manual reference position return axis (±J1
to ±J8) on, the tool the machine is turned on, it decelerates, and when it
is turned off again, it stops at the first grid point, and reference position
return end signal is output. This point is the reference position.
By performing manual reference position return, the machine coordinate
system and the work coordinate system is established.
There is only one method available to perform manual reference point
return:
In the grid method, a certain grid of the position detection is appointed as
the reference position. The reference position position can be shifted by
the grid shift function.
This function moves the machine to around the reference position set for
each axis in the manual continuous feed mode. Then it sets the reference
position for the machine in the manual reference position return mode
without the deceleration signal for reference position return. With this
function, the machine reference position can be set at a given position
without the deceleration signal for reference position return.
1 Place the machine in the manual continuous feed mode, and perform
positioning to a position near but not exceeding the reference position
from reference position return direction (setting by parameter).
2 Enter the manual reference position return mode, then input the feed
axis direction select signal (+) or (–) for the axis.
3 Positioning is made at the grid point located nearest from the current
point to reference position return direction. This point is recorded as
the reference position. If the absolute-position detector is provided,
the set reference position is retained after the power is turned off. In
this case, when the power is turned on again, there is no need for setting
the reference position again.
1 In reference position return mode after reference position
establishment, when the feed axis selection signal for the axis is set to
1, reference position return operation is performed by rapid traverse,
regardless of the direction of the feed axis direction selection signal.
5.1
MANUAL
REFERENCE
POSITION RETURN
5.2
SETTING THE
REFERENCE
POSITION WITHOUT
DOGS
Explanations
D Setting the reference
position
D Reference position
return