HEIDENHAIN TNC 640 (34059x-02) Cycle programming - Manual (Page 167)

CIRCULAR PATTERN (Cycle 220, DIN/ISO: G220) 6.2
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TNC 640 | User's Manual Cycle Programming | 5/2013
167
6.2 CIRCULAR PATTERN (Cycle 220, DIN/
ISO: G220)
Cycle run
1 At rapid traverse, the TNC moves the tool from its current
position to the starting point for the first machining operation.
Sequence:
2. Move to the 2nd set-up clearance (spindle axis)
Approach the starting point in the spindle axis.
Move to the set-up clearance above the workpiece surface
(spindle axis).
2 From this position, the TNC executes the last defined fixed
cycle.
3 The tool then approaches on a straight line or circular arc the
starting point for the next machining operation. The tool stops at
the set-up clearance (or the 2nd set-up clearance).
4 This process (1 to 3) is repeated until all machining operations
have been executed.
Please note while programming:
Cycle 220 is DEF active, which means that Cycle 220
automatically calls the last defined fixed cycle.
If you combine Cycle 220 with one of the fixed
cycles 200 to 209 and 251 to 267, the set-up
clearance, workpiece surface and 2nd set-up
clearance that you defined in Cycle 220 will be
effective for the selected fixed cycle.