HEIDENHAIN iTNC 530 (340 420) ISO programming User Manual
Page 286
286
8 Programming: Cycles
8.4 Cy
cles f
o
r Milling P
o
c
k
ets, St
uds and Slots
Before programming, note the following:
The TNC automatically pre-positions the tool in the tool
axis and working plane.
During roughing the tool plunges into the material with a
sideward reciprocating motion from one end of the slot to
the other. Pilot drilling is therefore unnecessary.
The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH = 0, the cycle will not be executed.
The cutter diameter must not be larger than the slot width
and not smaller than a third of the slot width.
The cutter diameter must be smaller than half the slot
length. The TNC otherwise cannot execute this cycle.
Enter in MP7441 bit 2 whether the TNC should output an
error message (bit 2=1) or not (bit 2=0) if a positive depth
is entered.
Danger of collision!
Keep in mind that the TNC reverses the calculation for pre-
positioning when a positive depth is entered. This
means that the tool moves at rapid traverse in the tool axis
at safety clearance below the workpiece surface!