HEIDENHAIN TNC 320 (340 55x-04) Cycle programming - Manual (Page 83)

HEIDENHAIN TNC 320 83
3.9 BORE MILLING (Cy
c
le 208, DIN/ISO: G208)
Cycle parameters
U Setup clearance Q200 (incremental): Distance
between tool lower edge and workpiece surface.
Input range 0 to 99999.9999
U Depth Q201 (incremental): Distance between
workpiece surface and bottom of hole. Input range:
-99999.9999 to 99999.9999
U Feed rate for plunging Q206: Traversing speed of
the tool during helical drilling in mm/min. Input range:
0 to 99999.999; alternatively FAUTO, FU, FZ.
U Infeed per helix Q334 (incremental): Depth of the tool
plunge with each helix (=360°). Input range 0 to
99999.9999
U Workpiece surface coordinate Q203 (absolute):
Coordinate of the workpiece surface. Input range:
-99999.9999 to 99999.9999
U 2nd setup 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 Nominal diameter Q335 (absolute value): Bore-hole
diameter. If you have entered the nominal diameter to
be the same as the tool diameter, the TNC will bore
directly to the entered depth without any helical
interpolation. Input range 0 to 99999.9999
U Roughing diameter Q342 (absolute): As soon as you
enter a value greater than 0 in Q342, the TNC no
longer checks the ratio between the nominal
diameter and the tool diameter. This allows you to
rough-mill holes whose diameter is more than twice
as large as the tool diameter. Input range 0 to
99999.9999
U Climb or up-cut Q351: Type of milling operation with
M3
+1 = climb milling
–1 = up-cut milling
Example: NC blocks
12 CYCL DEF 208 BORE MILLING
Q200=2 ;SETUP CLEARANCE
Q201=-80 ;DEPTH
Q206=150 ;FEED RATE FOR PLNGNG
Q334=1.5 ;PLUNGING DEPTH
Q203=+100 ;SURFACE COORDINATE
Q204=50 ;2ND SETUP CLEARANCE
Q335=25 ;NOMINAL DIAMETER
Q342=0 ;ROUGHING DIAMETER
Q351=+1 ;CLIMB OR UP-CUT
X
Z
Q200
Q201
Q203
Q204
Q334
X
Y
Q206
Q335