HEIDENHAIN TNC 426 (280 476) User Manual
Page 242
HEIDENHAIN TNC 426, TNC 430
215
8.3 Cy
cles f
o
r Dr
illing, T
a
pping and Thr
ead Milling
7
7
7
7
Set-up clearance
Q200 (incremental value): Distance
between tool tip and workpiece surface.
7
7
7
7
Depth
Q201 (incremental value): Distance between
workpiece surface and bottom of hole
7
7
7
7
Feed rate for plunging
Q206: Traversing speed of
the tool during reaming in mm/min
7
7
7
7
Dwell time at depth
Q211: Time in seconds that the
tool remains at the hole bottom
7
7
7
7
Retraction feed rate
Q208: Traversing speed of the
tool in mm/min when retracting from the hole. If you
enter Q208 = 0, the tool retracts at the reaming feed
rate.
7
7
7
7
Workpiece surface coordinate
Q203 (absolute
value): Coordinate of the workpiece surface
7
7
7
7
2nd set-up clearance
Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
Example: NC blocks
10 L Z+100 R0 FMAX
11 CYCL DEF 201 REAMING
Q200 = 2 ;SET-UP CLEARANCE
Q201 = -15 ;DEPTH
Q206 = 100 ;FEED RATE FOR PLUNGING
Q211 = 0.5 ;DWELL TIME AT BOTTOM
Q208 = 250 ;RETRACTION FEED TIME
Q203 = +20 ;SURFACE COORDINATE
Q204 = 100 ;2ND SET-UP CLEARANCE
12 L X+30 Y+20 FMAX M3
13 CYCL CALL
14 L X+80 Y+50 FMAX M9
15 L Z+100 FMAX M2