HEIDENHAIN iTNC 530 89
3.7 BACK BORING (Cycle 204, DIN/ISO: G204)
Cycle parameters
U Setup clearance Q200 (incremental): Distance
between tool tip and workpiece surface. Input range
0 to 99999.9999, alternatively PREDEF
U Depth of counterbore Q249 (incremental):
Distance between underside of workpiece and
the top of the hole. A positive sign means the hole
will be bored in the positive spindle axis direction.
Input range -99999.9999 to 99999.9999
U Material thickness Q250 (incremental): Thickness of
the workpiece. Input range 0.0001 to 99999.9999
U Off-center distance Q251 (incremental): Off-center
distance for the boring bar; value from tool data sheet.
Input range 0.0001 to 99999.9999
U Tool edge height Q252 (incremental): Distance
between the underside of the boring bar and the main
cutting tooth; value from tool data sheet. Input range
0.0001 to 99999.9999
U Feed rate for pre-positioning Q253: Traversing
speed of the tool in mm/min when plunging into the
workpiece, or when retracting from the workpiece.
Input range 0 to 99999,999 alternatively FMAX, FAUTO,
PREDEF.
U Feed rate for back boring Q254: Traversing speed
of the tool during back boring in mm/min. Input range:
0 to 99999.999; alternatively FAUTO, FU.
U Dwell time Q255: Dwell time in seconds at the top of
the bore hole. Input range 0 to 3600.000
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