HEIDENHAIN TNC 620 (340 56x-02) Cycle programming - Manual (Page 162)

162 Fixed Cycles: Pattern Definitions
6.3 LINEAR P
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6.3 LINEAR PATTERN (Cycle 221,
DIN/ISO: G221, Advanced
Programming Features
Software Option)
Cycle run
1 The TNC automatically moves the tool from its current position to
the starting point for the first machining operation.
Sequence:
„ Move to the 2nd set-up clearance (spindle axis)
„ Approach the starting point in the spindle axis.
„ Move to the setup clearance above the workpiece surface
(spindle axis).
2 From this position the TNC executes the last defined fixed cycle.
3 The tool then approaches the starting point for the next machining
operation in the positive reference axis direction at the setup
clearance (or the 2nd setup clearance).
4 This process (1 to 3) is repeated until all machining operations on
the first line have been executed. The tool is located above the last
point on the first line.
5 The tool subsequently moves to the last point on the second line
where it carries out the machining operation.
6 From this position the tool approaches the starting point for the
next machining operation in the negative reference axis direction.
7 This process (6) is repeated until all machining operations in the
second line have been executed.
8 The tool then moves to the starting point of the next line.
9 All subsequent lines are processed in a reciprocating movement.
Please note while programming:
X
Y
Z
Cycle 221 is DEF active, which means that Cycle 221
automatically calls the last defined fixed cycle.
If you combine Cycle 221 with one of the canned cycles
200 to 209 and 251 to 267, the setup clearance, workpiece
surface, 2nd setup clearance and the rotational position
that you defined in Cycle221 will be effective for the
selected canned cycle.
The slot position 0 is not allowed if you use Cycle 254
Circular Slot in combination with Cycle 221.