HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 363)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 363
4.26 Milling cy
cles
You can change the cutting direction with the cutting direction H,
the machining direction Q and the direction of tool rotation (see
following table).
Parameters—finishing
Q
Machining direction (default: 0)
 0: From the inside out (from the inside towards the outside)
 1: From the outside in (from the outside towards the inside)
O Plunging behavior (default: 0)
 O=0 (vertical plunge): The cycle moves the tool to the
starting point; the tool plunges and finishes the pocket.
 Q=1 (approaching arc with depth feed): When machining the
upper milling planes, the tool advances to the milling plane
and then approaches on an arc. When machining the bottom
milling plane, the tool plunges to the milling depth while
moving on the approaching arc (three-dimensional
approaching arc). You can use this approach behavior only in
conjunction with an approaching arc "R" and when machining
from the outside toward the inside (Q=1).
Cycle run
1
Starting position (X, Z, C) is the position before the cycle begins.
2 Calculates the number of cutting passes (infeeds to the milling
planes, infeeds in the milling depths).
3 Moves to the safety clearance and feeds to the first milling depth.
4 Mills a plane.
5 Retracts by the safety clearance, returns and cuts to the next
milling depth.
6 Repeat steps 4 and 5 until the complete surface is milled.
7 Returns to retraction plane RB.
Pocket milling, finishing G846
Cutting direction
Direction of tool
rotation
Execution Cutting direction
Direction of tool
rotation
Execution
Up-cut milling
(H=0) Mx03 Climb milling (H=1) Mx03
Up-cut milling
(H=0) Mx04 Climb milling (H=1) Mx04