Fixed Cycles: Pocket Milling / Stud Milling / Slot Milling
5.5 CIRCULAR SLOT (Cycle 254, DIN/ISO: G254)
5
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HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
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
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
Q375 Pitch circle diameter?: Enter the diameter of
the pitch circle. Input range 0 to 99999.9999
Q367 Ref. for slot pos. (0/1/2/3)?: 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.
Q216 Center in 1st axis? (absolute): Center of the
stud in the reference axis of the working plane.
Only effective if Q367 = 0. Input range -99999.9999
to 99999.9999
Q217 Center in 2nd axis? (absolute): Center of the
stud in the secondary axis of the working plane.
Only effective if Q367 = 0. Input range -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?: Total number of
machining positions on the pitch circle. Input range
1 to 99999
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