HEIDENHAIN TNC 640 (34059x-01) Cycle programming User Manual
Page 78
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Fixed Cycles: Drilling
3.7 BA
CK BORING (Cy
c
le 204, DIN/ISO: G204)
U
Workpiece surface coordinate Q203 (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
U
2nd set-up clearance Q204 (incremental): Coordinate
in the spindle axis at which no collision between tool
and workpiece (fixtures) can occur. Input range 0 to
99999.9999
U
Disengaging direction (0/1/2/3/4) Q214: Determine
the direction in which the TNC displaces the tool by
the off-center distance (after spindle orientation).
Input of 0 is not permitted.
U
Angle for spindle orientation Q336 (absolute): Angle
at which the TNC positions the tool before it is
plunged into or retracted from the bore hole. Input
range -360.0000 to 360.0000
Example: NC blocks
11 CYCL DEF 204 BACK BORING
Q200=2
;SET-UP CLEARANCE
Q249=+5
;DEPTH OF COUNTERBORE
Q250=20
;MATERIAL THICKNESS
Q251=3.5
;OFF-CENTER DISTANCE
Q252=15
;TOOL EDGE HEIGHT
Q253=750
;F PRE-POSITIONING
Q254=200
;F COUNTERSINKING
Q255=0
;DWELL TIME
Q203=+20
;SURFACE COORDINATE
Q204=50
;2ND SET-UP CLEARANCE
Q214=1
;DISENGAGING DIRECTN
Q336=0
;ANGLE OF SPINDLE
1
Retract tool in the negative ref. axis direction.
2
Retract tool in the negative minor axis direction.
3
Retract tool in the positive ref. axis direction.
4
Retract tool in the positive minor axis direction.