
4.REFERENCE POSITION ESTABLISHMENT B-63943EN-1/02
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4.4 2ND REFERENCE POSITION RETURN / 3RD, 4TH
REFERENCE POSITION RETURN
Overview
The G30 command positions the tool to the 2nd, 3rd, or 4th reference
position, via the specified intermediate point. It then sets the
completion signal for 2nd, 3rd, or 4th reference position return to 1.
Before issuing the G30 command, The 2nd, 3rd, or 4th reference
position must be set in parameter No. 1241, 1242, or 1243 with
coordinates in the machine coordinate system.
On the tool path for return to the 2nd, 3rd, or 4th reference position
(G30), the tool is moved to the intermediate point or reference
position at the rapid traverse rate for each axis.
Bit 1 (LRP) of parameter No. 1401 can be set to specify whether to
use nonlinear interpolation positioning or linear interpolation
positioning for the tool path to the intermediate point during return to
the 2nd, 3rd, or 4th reference position (G30) in the same way as for
automatic reference position return (G28).
When bit 1 (LRP) of parameter No. 1401 is set to 1 to use linear
interpolation positioning, bit 4 (ZLN) of parameter No. 1015 can be
set to use linear interpolation positioning for the tool path from the
intermediate point to the reference position during return to the 2nd,
3rd, or 4th reference position (G30).
Return to the 2nd, 3rd, or 4th reference position can be performed
only after the reference position has been established.
Signal
Second reference position return end signals ZP21 to ZP28<Fn096>
Third reference position return end signals ZP31 to ZP38<Fn098>
Fourth reference position return end signals ZP41 to ZP48<Fn100>
[Classification] Output signal
[Function] The second, third, and fourth reference position end signals report the
tool is at the second, third, and fourth reference positions on a
controlled axis. These signals are provided for axes in a one-to -one
correspondence. A numeric character appended to the end of a signal
represents a controlled axis number, and a numeric character
immediately following ZP represents a reference position number.
Z P x
y
x : 2 ..... Second reference position return
3 ..... Third reference position return
4 ..... Fourth reference position return
y : 1 ..... Return end signal for the first axis
2 ..... Return end signal for the second axis
3 ..... Return end signal for the third axis
: :