HEIDENHAIN TNC 640 User Manual page 178

5
Fixed Cycles: Pocket Milling / Stud Milling / Slot Milling | CIRCULAR SLOT (Cycle 254, DIN/ISO: G254)
Q217 Center in 2nd axis? (absolute): Center
of the stud in the minor axis of the working
plane.
-99999.9999 to 99999.9999
Q376 Starting angle? (absolute): Enter the polar
angle of the starting point. Input range -360.000 to
360.000
Q248 Angular length? (incremental): Enter the
angular length of the slot. Input range 0 to 360.000
Q378 Intermediate stepping angle?
(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
Q377 Number of repetitions?: Number of
machining operations on a pitch circle. Input range
1 to 99999
Q207 Feed rate for milling?: Traversing speed of
the tool in mm/min while milling. Input range 0 to
99999.999 alternatively FAUTO, fu, FZ
Q351 Direction? Climb=+1, Up-cut=-1: Type of
milling operation with M3:
+1 = Climb
–1 = Up-cut
PREDEF: The TNC uses the value from the
GLOBAL DEF block (if you enter 0, climb milling is
performed)
Q201 Depth? (incremental): Distance between
workpiece surface and bottom of slot. Input range
-99999.9999 to 99999.9999
Q202 Plunging depth? (incremental): Infeed per
cut; enter a value greater than 0. Input range 0 to
99999.9999
Q369 Finishing allowance for floor?
(incremental): Finishing allowance for the floor.
Input range 0 to 99999.9999
Q206 Feed rate for plunging?: Traversing speed
of the tool in mm/min while moving to depth.
Input range 0 to 99999.999, alternatively FAUTO,
FU, FZ
178
Only effective if Q367 = 0. Input range
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 DIAMETR
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
HEIDENHAIN | User's manual for cycle programming | 10/2017