HEIDENHAIN TNC 320 (340 55x-04) Cycle programming - Manual (Page 153)

HEIDENHAIN TNC 320 153
5.7 CIR
C
ULAR S
T
UD (Cy
c
le 257
, DIN/ISO: G257)
U Depth Q201 (incremental): Distance between
workpiece surface and bottom of stud. Input range:
-99999.9999 to 99999.9999
U Plunging depth Q202 (incremental): Infeed per cut.
Enter a value greater than 0. Input range 0 to
99999.9999
U Feed rate for plunging Q206: Traversing speed of
the tool while moving to depth in mm/min. Input
range: 0 to 99999.999; alternatively FMAX, FAUTO,
FU, FZ.
U Setup clearance Q200 (incremental): Distance
between tool tip and workpiece surface. Input range
0 to 99999.9999
U Workpiece surface coordinate Q203 (absolute):
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 Path overlap factor Q370: Q370 x tool radius =
stepover factor k. Input range 0.1 to 1.9999.
Example: NC blocks
8 CYCL DEF 257 CIRCULAR STUD
Q223=60 ;FINISHED PART DIA.
Q222=60 ;WORKPIECE BLANK DIA.
Q368=0.2 ;ALLOWANCE FOR SIDE
Q207=500 ;FEED RATE FOR MILLING
Q351=+1 ;CLIMB OR UP-CUT
Q201=-20 ;DEPTH
Q202=5 ;PLUNGING DEPTH
Q206=150 ;FEED RATE FOR PLUNGING
Q200=2 ;SETUP CLEARANCE
Q203=+0 ;SURFACE COORDINATE
Q204=50 ;2ND SETUP CLEARANCE
Q370=1 ;TOOL PATH OVERLAP
9 L X+50 Y+50 R0 FMAX M3 M99
X
Z
Q200
Q201
Q206
Q203
Q204
Q202