HEIDENHAIN TNC 320 (77185x-01) Cycle programming - Manual (Page 144)

Fixed cycles: Pocket milling / stud milling / slot milling
5.5 CIRCULAR SLOT (Cycle 254, DIN/ISO: G254)
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144
TNC 320 | User's Manual Cycle Programming | 3/2014
Stepping angle Q378 (incremental): Angle by which
the entire slot is rotated. The center of rotation is at
the center of the pitch circle. Input range -360.000
to 360.000
Number of repetitions Q377: Number of machining
operations on a pitch circle. Input range 1 to 99999
Feed rate for milling Q207: Traversing speed of
the tool in mm/min while milling. Input range 0 to
99999.999 alternatively
FAUTO, FU, FZ
Climb or up-cut Q351: Type of milling operation
with M3
+1 = climb
–1 = up-cut
PREDEF: The TNC uses the value from the GLOBAL
DEF block
Depth Q201 (incremental): Distance between
workpiece surface and bottom of slot. Input range
-99999.9999 to 99999.9999
Plunging depth Q202 (incremental): Infeed per
cut. Enter a value greater than 0. Input range 0 to
99999.9999
Finishing allowance for floor Q369 (incremental
value): Finishing allowance in the tool axis. Input
range 0 to 99999.9999
Feed rate for plunging Q206: Traversing speed of
the tool while moving to depth in mm/min. Input
range 0 to 99999.999; alternatively
FAUTO, FU, FZ
Infeed for finishing Q338 (incremental): Infeed per
cut. Q338=0: Finishing in one infeed. Input range 0
to 99999.9999
Set-up clearance Q200 (incremental): Distance
between tool tip and workpiece surface. Input range
0 to 99999.9999; alternatively
PREDEF
NC blocks
8 CYCL DEF 254 CIRCULAR SLOT
Q215=0 ;MACHINING OPERATION
Q219=12 ;SLOT WIDTH
Q368=0.2 ;ALLOWANCE FOR SIDE
Q375=80 ;PITCH CIRCLE DIA.
Q367=0 ;REF. SLOT POSITION
Q216=+50 ;CENTER IN 1ST AXIS
Q217=+50 ;CENTER IN 2ND AXIS
Q376=+45 ;STARTING ANGLE
Q248=90 ;ANGULAR LENGTH
Q378=0 ;STEPPING ANGLE
Q377=1 ;NR OF REPETITIONS
Q207=500 ;FEED RATE FOR
MILLING