HEIDENHAIN TNC 620 (34056x-04) Cycle programming - Manual (Page 139)

SLOT MILLING (Cycle 253, DIN/ISO: G253, software option 19) 5.4
5
TNC 620 | User's Manual Cycle Programming | 5/2013
139
5.4 SLOT MILLING (Cycle 253, DIN/ISO:
G253, software option 19)
Cycle run
Use Cycle 253 to completely machine a 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 Starting from the left slot arc center, the tool moves in a
reciprocating motion 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 (parameter Q368) into account.
3 This process is repeated until the programmed 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 in the left slot arc.
5 Then the TNC finishes the floor of the slot from the inside out.