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3
Fixed Cycles: Drilling
3.2
CENTERING (Cycle 240, DIN/ISO: G240)
Cycle parameters
Q200 Set-up clearance? (incremental): Distance
between tool tip and workpiece surface. Enter a
positive value. Input range 0 to 99999.9999
Q343 Select diameter/depth (1/0): Select whether
centering is based on the entered diameter or
depth. If the TNC is to center based on the entered
diameter, the point angle of the tool must be
defined in the T ANGLE column of the tool table
TOOL.T.
0: Centering based on the entered depth
1: Centering based on the entered diameter
Q201 Depth? (incremental): Distance between
workpiece surface and centering bottom (tip
of centering taper). Only effective if Q343=0 is
defined. Input range -99999.9999 to 99999.9999
Q344 Diameter of counterbore (algebraic sign):
Centering diameter. Only effective if Q343=1 is
defined. Input range -99999.9999 to 99999.9999
Q206 Feed rate for plunging?: Traversing speed of
the tool in mm/min during centering. Input range 0
to 99999.999, alternatively FAUTO, FU
Q211 Dwell time at the depth?: Time in seconds
that the tool remains at the hole bottom. Input range
0 to 3600.0000
Q203 Workpiece surface coordinate? (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
Q204 2nd set-up clearance? (incremental):
Coordinate in the spindle axis at which no collision
between tool and workpiece (fixtures) can occur.
Input range 0 to 99999.9999
66
NC blocks
10 L Z+100 R0 FMAX
11 CYCL DEF 240 CENTERING
12 L X+30 Y+20 R0 FMAX M3 M99
13 L X+80 Y+50 R0 FMAX M99
HEIDENHAIN | TNC 320 | User's manual for cycle programming | 9/2016
Q200=2
;SET-UP CLEARANCE
Q343=1
;SELECT DIA./DEPTH
Q201=+0
;DEPTH
Q344=-9
;DIAMETER
Q206=250
;FEED RATE FOR
PLNGNG
Q211=0.1
;DWELL TIME AT DEPTH
Q203=+20
;SURFACE COORDINATE
Q204=100
;2ND SET-UP
CLEARANCE
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