Global Data Valid Everywhere; Global Data For Drilling Operations; Global Data For Milling Operations With Pocket Cycles 25X; Global Data For Milling Operations With Contour Cycles - HEIDENHAIN TNC 640 User Manual

Using Fixed Cycles | Program defaults for cycles

Global data valid everywhere

Safety clearance: Distance between tool tip and workpiece
surface for automated approach of the cycle start position in the
tool axis
2nd set-up clearance: Position to which the TNC positions the
tool at the end of a machining step. The next machining position
is approached at this height in the machining plane
F positioning: Feed rate at which the TNC traverses the tool
within a cycle
F retraction: Feed rate at which the TNC retracts the tool.
The parameters are valid for all fixed cycles with
numbers greater than 2xx.

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, 241 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 face 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.
HEIDENHAIN | User's manual for cycle programming | 10/2017
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