HEIDENHAIN TNC 620 (340 56x-03) Cycle programming - Manual (Page 143)

HEIDENHAIN TNC 620 143
5.5 CIR
C
ULAR SL
O
T
(Cy
c
le 254, D
IN/ISO: G254, A
d
v
a
nced Pr
ogr
a
mming
F
e
at
ur
es Sof
tw
a
re
Option)
5.5 CIRCULAR SLOT (Cycle 254,
DIN/ISO: G254, Advanced
Programming Features
Software Option)
Cycle run
Use Cycle 254 to completely machine a circular slot. 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 moves in a reciprocating motion in the slot center at the
plunging angle defined in the tool table to the first infeed depth.
Specify the plunging strategy with Parameter Q366.
2 The TNC roughs out the slot from the inside out, taking the
finishing allowances (parameters Q368 and Q369) into account.
3 This process is repeated until the slot depth is reached.
Finishing
4 Inasmuch as finishing allowances are defined, the TNC then
finishes the slot walls, in multiple infeeds if so specified. The slot
side is approached tangentially.
5 Then the TNC finishes the floor of the slot from the inside out. The
slot floor is approached tangentially.