HEIDENHAIN TNC 128 (77184x-02) - Manual (Page 384)

Cycle fundamentals
15.5 POLAR PATTERN (Cycle 220)
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TNC 128 | User's Manual HEIDENHAIN Conversational Programming | 5/2014
15.5 POLAR PATTERN (Cycle 220)
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:
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 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.