HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 538)

538 DIN programming for the Y axis
6.7 Milling cy
cles f
o
r the Y axis
For the cutting direction, machining direction and direction of tool
rotation, please refer to table G846 in the User's Manual.
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, Y, Z, C) is the position before the cycle
begins.
2 Calculate the proportioning of cuts (infeeds to the milling planes,
infeeds in the milling depths).
3 Move to the safety clearance and plunge to the first milling depth.
4 Mill the first plane.
5 Retract by the safety clearance, return and cut to the next milling
depth.
6 Repeat steps 4 and 5 until the complete area is milled.
7 Return to "retraction plane J."
Parameters—finishing