Commands Calling Axis Movements
2.2 Reference point return
04.07
2-38
© Siemens AG 2007 All rights reserved
SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) -- 04.07 Edition
2.2.3 Second to fourth reference point return (G30)
Format
G30 Pn X... Y... Z... ;
With the commands of “G30 Pn X ⋅⋅⋅ Y ⋅⋅⋅ Z;”,theaxesaremovedtoP2(se-
cond reference point), P3 (third reference point*), or P4 ( fourth reference point*) in
the simultaneous 3-axis (* 5-axis) control mode after the positioning at the specified
intermediate positioning point. If “G30 P3 X30. Y50.;” is specified, the X- and Y-axis
return to the third reference point. If “Pn” is omitted, the second reference point is
selected. The axes not specified in the G30 block do not move.
Reference point positions
The position of each reference point is determined in reference to the first refer-
ence point. The distance from the first reference point to each of the reference
points is set for the following machine data:
Table 2-3 Reference points
Item
MD
3rd reference point $_MA_REFP_SET_POS[2]
4th reference point $_MA_REFP_SET_POS[3]
Supplements to the 2nd to 4th reference point return commands
S For the points to be considered to for the execution of G 30, refer to the supple-
ments in 2.2.1, “Automatic Return to Reference Point (G28)”.
S For the execution of G30, reference point return must have been completed
after power-ON either manually or by the execution of G28. If an axis for which
reference point return has not been completed is included in the axes specified
in the G30 block, an alarm occurs.
2.2.4 Rapid lift with G10.6
G10.6
<AxisPosition>
is
used
to
activate
a
retraction
position
for
the
rapid
lifting
of
a tool (e.g., in the event of a tool break). The retraction motion itself is started with
a digital signal. The second NC fast input is used as the start signal.
Machine data $MN_EXTERN_INTERRUPT_NUM_RETRAC is used to select a
different fast input (1 -- 8).
In Siemens mode, the activation of the retraction motion comprises a number of
part program commands.
N10 G10.6 X19.5 Y33.3
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