HEIDENHAIN TNC 320 (34055x-06) Cycle programming - Manual (Page 48)

Using Fixed Cycles
2.2 Program defaults for cycles
2
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TNC 320 | User's Manual Cycle Programming | 5/2013
Global data for drilling operations
Retraction rate for chip breaking: Value by which the TNC
retracts the tool during chip breaking
Dwell time at depth: Time in seconds that the tool remains at
the hole bottom
Dwell time at top: Time in seconds that the tool remains at the
set-up clearance
The parameters apply to the drilling, tapping and
thread milling cycles 200 to 209, 240, and 262 to 267.
Global data for milling operations with pocket cycles
25x
Overlap factor: The tool radius multiplied by the overlap factor
equals the lateral stepover
Climb or up-cut: Select the type of milling
Plunging type: Plunge into the material helically, in a
reciprocating motion, or vertically
The parameters apply to milling cycles 251 to 257.
Global data for milling operations with contour cycles
Set-up clearance: Distance between tool tip and workpiece
surface for automated approach of the cycle start position in the
tool axis
Clearance height: Absolute height at which the tool cannot
collide with the workpiece (for intermediate positioning and
retraction at the end of the cycle)
Overlap factor: The tool radius multiplied by the overlap factor
equals the lateral stepover
Climb or up-cut: Select the type of milling
The parameters apply to SL cycles 20, 22, 23, 24 and
25.