HEIDENHAIN TNC 320 (340 551-01) - Manual (Page 189)

HEIDENHAIN TNC 320 189
8.2 Cy
cles f
o
r Dr
illing,
T
apping 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 Dwell time at top Q210: Time in seconds that the
tool remains at set-up clearance after having been
retracted from the hole for chip release.
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 after
each infeed.
8 No. of breaks before retracting Q213: Number of
chip breaks after which the TNC is to withdraw the
tool from the hole for chip release. For chip breaking,
the TNC retracts the tool each time by the value in
Q256.
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 Dwell time at depth Q211: Time in seconds that the
tool remains at the hole bottom.
8 Retraction feed rate Q208: Traversing speed of the
tool in mm/min when retracting from the hole. If you
enter Q208 = 0, the TNC retracts the tool at the feed
rate in Q206.
8 Retraction rate for chip breaking Q256
(incremental value): Value by which the TNC retracts
the tool during chip breaking.
Example: NC blocks
11 CYCL DEF 203 UNIVERSAL DRILLING
Q200=2 ;SET-UP CLEARANCE
Q201=-20 ;DEPTH
Q206=150 ;FEED RATE FOR PLUNGING
Q202=5 ;PLUNGING DEPTH
Q210=0 ;DWELL TIME AT TOP
Q203=+20 ;SURFACE COORDINATE
Q204=50 ;2ND SET-UP CLEARANCE
Q212=0.2 ;DECREMENT
Q213=3 ;BREAKS
Q205=3 ;MIN. PLUNGING DEPTH
Q211=0.25 ;DWELL TIME AT DEPTH
Q208=500 ;RETRACTION FEED RATE
Q256=0.2 ;DIST. FOR CHIP BRKNG
X
Z
Q200
Q201
Q206
Q202
Q210
Q203
Q204
Q211
Q208