SLOT MILLING (Cycle 253, DIN/ISO: G253) 5.4
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HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
143
Cycle parameters
Q215 Machining operation (0/1/2)?: Define
machining operation:
0: Roughing and finishing
1: Only roughing
2: Only finishing
Side finishing and floor finishing are only machined
when the specific allowance (Q368, Q369) is deined
Q218 Length of slot? (value parallel to the reference
axis of the working plane): Enter the length of the
slot. Input range 0 to 99999.9999
Q219 Width of slot? (value parallel to the secondary
axis of the working plane): Enter the slot width.
If you enter a slot width that equals the tool
diameter, the TNC will carry out the roughing
process only (slot milling). Maximum slot width for
roughing: Twice the tool diameter. Input range 0 to
99999.9999
Q368 Finishing allowance for side? (incremental):
Finishing allowance in the machining plane Input
range 0 to 99999.9999
Q374 Angle of rotation? (absolute): Angle by which
the entire slot is rotated. The center of rotation is
the position at which the tool is located when the
cycle is called. Input range -360.000 to 360.000
Q367 Position of slot (0/1/2/3/4)?: Position of the
slot in reference to the position of the tool when the
cycle is called:
0: Tool position = slot center
1: Tool position = left end of slot
2: Tool position = center of left slot arc
3: Tool position = center of right slot arc
4: Tool position = right end of slot
Q207 Feed rate for milling?: Traversing speed of
the tool in mm/min during 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
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