HEIDENHAIN iTNC 530 (340 49x-02) ISO programming - Manual (Page 288)

288 8 Programming: Cycles
8.3 Cy
cles f
o
r Dr
illing, T
a
pping and Thr
ead Milling
8 Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
8 Depth Q201 (incremental value): Distance between
workpiece surface and bottom of hole (tip of drill
taper).
8 Feed rate for plunging Q206: Traversing speed of
the tool during drilling in mm/min.
8 Plunging depth Q202 (incremental value): Infeed per
cut. The depth does not have to be a multiple of the
plunging depth. The TNC will go to depth in one
movement if:
„ the plunging depth is equal to the depth
„ the plunging depth is greater than the depth
8 Workpiece surface coordinate Q203 (absolute
value): Coordinate of the workpiece surface.
8 2nd set-up clearance Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
8 Decrement Q212 (incremental value): Value by which
the TNC decreases the plunging depth Q202.
8 Minimum plunging depth Q205 (incremental value): If
you have entered a decrement, the TNC limits the
plunging depth to the value entered with Q205.
8 Upper advanced stop distance Q258 (incremental
value): Set-up clearance for rapid traverse positioning
when the TNC moves the tool again to the current
plunging depth after retraction from the hole; value
for the first plunging depth.
8 Lower advanced stop distance Q259 (incremental
value): Set-up clearance for rapid traverse positioning
when the TNC moves the tool again to the current
plunging depth after retraction from the hole; value
for the last plunging depth.
Example: NC blocks
N110 G205 UNIVERSAL PECKING
Q200=2 ;SET-UP CLEARANCE
Q201=-80 ;DEPTH
Q206=150 ;FEED RATE FOR PLUNGING
Q202=15 ;INFEED DEPTH
Q203=+100 ;SURFACE COORDINATE
Q204=50 ;2ND SET-UP CLEARANCE
Q212=0.5 ;DECREMENT
Q205=3 ;MIN. PLUNGING DEPTH
Q258=0.5 ;UPPER ADV STOP DIST
Q259=1 ;LOWER ADV STOP DIST
Q257=5 ;DEPTH FOR CHIP BRKNG
Q256=0.2 ;DIST. FOR CHIP BRKNG
Q211=0.25 ;DWELL TIME AT DEPTH
Q379=7.5 ;STARTING POSITION
Q253=750 ;F PRE-POSITIONING
If you enter Q258 not equal to Q259, the TNC will change
the advance stop distances between the first and last
plunging depths at the same rate.