Cycle Parameters - HEIDENHAIN TNC 620 User Manual

5
CIRCULAR SLOT (Cycle 254, DIN/ISO: G254, software option 19) 5.5

Cycle parameters

Machining operation (0/1/2) Q215: 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
defined
Slot width Q219 (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
Finishing allowance for side Q368 (incremental):
Finishing allowance in the working plane. Input
range 0 to 99999.9999
Pitch circle diameter Q375: Enter the diameter of
the pitch circle. Input range 0 to 99999.9999
Reference for slot position (0/1/2/3) Q367:
Position of the slot in reference to the position of
the tool when the cycle is called:
0: Tool position is not taken into account. The slot
position is determined from the entered pitch circle
center and the starting angle
1: Tool position = center of left slot arc. Starting
angle Q376 refers to this position. The entered pitch
circle center is not taken into account
2: Tool position = center of centerline. Starting angle
Q376 refers to this position. The entered pitch circle
center is not taken into account
3: Tool position = center of right slot arc. Starting
angle Q376 refers to this position. The entered pitch
circle center is not taken into account.
Center in 1st axis Q216 (absolute): Center of the
pitch circle in the reference axis of the working
Only effective if Q367 = 0. Input range
plane.
-99999.9999 to 99999.9999
Center in 2nd axis Q217 (absolute): Center of the
pitch circle in the minor axis of the working plane.
Only effective if Q367 = 0. Input range -99999.9999
to 99999.9999
Starting angle Q376 (absolute): Enter the polar
angle of the starting point. Input range -360.000 to
360.000
Angular length Q248 (incremental): Enter the
angular length of the slot. Input range 0 to 360.000
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TNC 620 | User's Manual Cycle Programming | 3/2014