HEIDENHAIN iTNC 530 (340 49x-04) User Manual
Page 375

HEIDENHAIN iTNC 530
375
8.5 Cy
cles f
o
r Dr
illing, T
a
pping and Thr
ead Milling
Infeed depth for chip breaking
Q257 (incremental
value): Depth at which the TNC carries out chip
breaking. There is no chip breaking if 0 is entered.
Retraction rate for chip breaking
Q256
(incremental value): Value by which the TNC retracts
the tool during chip breaking.
Dwell time at depth
Q211: Time in seconds that the
tool remains at the hole bottom.
Deepened starting point
Q379 (incremental value
with respect to the workpiece surface): Starting
position of drilling if a shorter tool has already pilot
drilled to a certain depth. The TNC moves at the feed
rate for pre-positioning
from the set-up clearance
to the deepened starting point.
Feed rate for pre-positioning
Q253: Traversing
velocity of the tool during positioning from the set-up
clearance to a deepened starting point in mm/min.
Effective only if Q379 is entered not equal to 0.
Example: NC blocks
11 CYCL DEF 205 UNIVERSAL PECKING
Q200=2
;SET-UP CLEARANCE
Q201=-80
;DEPTH
Q206=150
;FEED RATE FOR PLUNGING
Q202=15
;PLUNGING 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 POINT
Q253=750
;F PRE-POSITIONING
If you use Q379 to enter a deepened starting point, the
TNC merely changes the starting point of the infeed
movement. Retraction movements are not changed by
the TNC, therefore they are calculated with respect to the
coordinate of the workpiece surface.