
5.NOTES ON CREATING PROGRAMS GENERAL B-63874EN/05
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<7> By setting bit 3 of parameter No. 27000 to 1, a cylindrical
interpolation command (G07.1) required for machining
(cylindrical interpolation) on the ZC plane can be
automatically specified during cycle machining. Upon
completion of the cycle machining, cylindrical interpolation
is automatically cancelled.
<8> Upon completion of cycle machining, the tool always
returns to the position before the start of the cycle
machining. By setting bit 7 of parameter No. 27002 to 1,
the tool can be placed at a position different from the
position before the start of the cycle machining.
<9> When using G code system B or C with a CNC of the T
series (T mode for a CNC for complex machining) and
specifying cycle machining (turning or milling), be sure to
switch to the absolute coordinate system by specifying G90
beforehand.
<10>For the cycle machining mentioned above, a similar
command is repeatedly entered. So, such a command can
be entered easily by registering a fixed form sentence
beforehand.
3. Cycle machining
<1> With a CNC of the T series as well, enter a coordinate value
for milling (such as an I point coordinate in milling-based
hole machining) as a radius value even if the value is an X
coordinate.
<2> Specify an I point coordinate not as a distance from point R
but as a coordinate value.
<3> Figure data should be entered as a subprogram for
utilization in roughing, finishing, and chamfering. This
eliminates the need to enter figure data each time.
<4> In machining of a projected portion (island figure), efficient
machining can be achieved by using pocketing with an
island instead of using contouring. In this case, specify a
blank as the outer wall of a pocket.
<5> In contouring (side facing), enter a start point figure and end
point figure so that both figures contact each other. This
means that by starting not from a corner of a figure but from
an intermediate point on a straight line, undercutting due to
approaching the figure and retraction can be eliminated.
<6> If the C-axis operates as the hole machining axis in an
attempt to execute hole machining by using the C-axis as
the positioning axis, the C-axis may be set as an axis
parallel to the X-axis with parameter No. 1022. In such a
case, set the parameters below to execute hole machining in
the axis direction normal to the plane including the C-axis.
When the parameter No. 5101#0 is set to 1 :
The hole machining axis in a hole machining canned
cycle is the third axis for plane specification.