HEIDENHAIN TNC 320 (340 55x-05) Cycle programming - Manual (Page 164)

164 Fixed Cycles: Pattern Definitions
6.3 CAR
T
ESIAN P
A
T
TERN (Cy
c
le
221, DIN/ISO: G221)
6.3 CARTESIAN PATTERN
(Cycle 221, DIN/ISO: G221)
Cycle run
1 The TNC automatically moves the tool from its current position to
the point of 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 the point of the next machining
operation in the positive reference axis direction at the set-up
clearance (or the 2nd set-up 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 point of 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 fixed cycles 200
to 209 and 251 to 267, the set-up clearance, workpiece
surface, 2nd set-up clearance and the rotational position
that you defined in Cycle 221 will be effective for the
selected fixed cycle.
The slot position 0 is not allowed if you use Cycle 254
Circular Slot in combination with Cycle 221.