Side Finishing (Cycle) - HEIDENHAIN ITNC 530 User Manual

SIDE FINISHING (Cycle 24)
The subcontours are approached and departed on a tangential arc.
Each subcontour is finish-milled separately.
Before programming, note the following:
The sum of allowance for side (Q14) and the radius of the
finish mill must be smaller than the sum of allowance for
side (Q3, Cycle 20) and the radius of the rough mill.
This calculation also holds if you run Cycle 24 without
having roughed out with Cycle 22; in this case, enter "0"
for the radius of the rough mill.
You can use Cycle 24 also for contour milling. Then you
must:
define the contour to be milled as a single island
(without pocket limit), and
enter the finishing allowance (Q3) in Cycle 20 to be
greater than the sum of the finishing allowance Q14 +
radius of the tool being used.
The TNC automatically calculates the starting point for
finishing. The starting point depends on the available
space in the pocket and the allowance programmed in
Cycle 20.
Direction of rotation ? Clockwise = -1 Q9:
Machining direction:
+1: Counterclockwise rotation
–1: Clockwise rotation
Plunging depth Q10 (incremental value): Dimension
by which the tool plunges in each infeed.
Feed rate for plunging Q11: Traversing speed of the
tool during penetration.
Feed rate for milling Q12: Traversing speed for
milling.
Finishing allowance for side Q14 (incremental
value): Enter the allowed material for several finish-
milling operations. If you enter Q14 = 0, the remaining
finishing allowance will be cleared.
408
Z
Q11
Q10
Example: NC blocks
61 CYCL DEF 24 SIDE FINISHING
Q9=+1 ;DIRECTION OF ROTATION
Q10=+5 ;INFEED DEPTH
Q11=100 ;FEED RATE FOR PLUNGING
Q12=350 ;FEED RATE FOR ROUGHING
Q14=+0 ;ALLOWANCE FOR SIDE
Q12
X
8 Programming: Cycles