Heidenhain TNC 640 (34059x-01) Cycle programming User Manual Page 350

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350 Cycles: Turning
13.21 RECESSING CONTOUR, AXIAL (Cycle 870)
U Finishing feed rate Q505: Feed rate during
finishing. If M136 has been programmed, the value is
interpreted by the TNC in millimeters per revolution,
without M136 in millimeters per minute.
U Cutting limit Q479: Activate the cutting limit
0: No cutting limit active
1: Cutting limit (Q480/Q482)
U Limit value for diameter Q480: X value for contour
limitation (diameter value)
U Limit value Z Q482: Z value for contour limitation
Example: NC blocks
9 CYCL DEF 14.0 CONTOUR GEOMETRY
10 CYCL DEF 14.1 CONTOUR LABEL2
11 CYCL DEF 870 AXIAL RECESSING
Q215=+0 ;MACHINING OPERATION
Q460=+2 ;SET-UP CLEARANCE
Q478=+0.3 ;ROUGHING FEED RATE
Q483=+0.4 ;OVERSIZE IN DIAMETER
Q484=+0.2 ;OVERSIZE IN Z
Q505=+0.2 ;FEED RATE FOR FINISHING
Q479=+0 ;CUTTING LIMIT
Q480=+0 ;LIMIT VALUE FOR DIAMETER
Q482=+0 ;LIMIT VALUE IN Z
12 L X+75 Y+0 Z+2 FMAX M303
13 CYCL CALL
14 M30
15 LBL 2
16 L X+60 Z+0
17 L Z-10
18 RND R5
19 L X+40 Z-15
20 L Z+0
21 LBL 0
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