HEIDENHAIN iTNC 530 (340 49x-04) ISO programming - Manual (Page 365)

HEIDENHAIN iTNC 530 365
8.4 Cy
cles f
o
r Milling P
o
c
k
ets, St
uds and Slots
CIRCULAR POCKET (Cycle G252)
Use Cycle 252 CIRCULAR POCKET to completely machine circular
pockets. Depending on the cycle parameters, the following machining
alternatives are available:
„ Complete machining: Roughing, floor finishing, side finishing
„ Only roughing
„ Only floor finishing and side finishing
„ Only floor finishing
„ Only side finishing
Roughing
1 The tool plunges into the workpiece at the pocket center and
advances to the first plunging depth. Specify the plunging strategy
with Parameter Q366.
2 The TNC roughs out the pocket from the inside out, taking the
overlap factor (Parameter Q370) and the finishing allowances
(parameters Q368 and Q369) into account.
3 At the end of the roughing operation, the TNC moves the tool
tangentially away from the pocket wall, then moves by the set-up
clearance above the current pecking depth and returns from there
at rapid traverse to the pocket center.
4 This process is repeated until the programmed pocket depth is
reached.
With an inactive tool table you must always plunge
vertically (Q366=0) because you cannot define a plunging
angle.