HEIDENHAIN TNC 426 (280 476) User Manual
Page 302
HEIDENHAIN TNC 426, TNC 430
275
8.4 Cy
cles f
or milling poc
k
e
ts, st
uds and slots
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 slot
7
7
7
7
Feed rate for milling
Q207: Traversing speed of the
tool in mm/min while milling.
7
7
7
7
Plunging depth
Q202 (incremental value): Total
extent by which the tool is fed in the tool axis during
a reciprocating movement
7
7
7
7
Machining operation (0/1/2)
Q215: Define the
machining operation:
0: Roughing and finishing
1: Only roughing
2: Only finishing
7
7
7
7
Workpiece surface coordinate
Q203 (absolute
value): Coordinate of the workpiece surface
7
7
7
7
2nd setup clearance
Q204 (incremental value):
Z coordinate at which no collision between tool and
workpiece (clamping devices) can occur
7
7
7
7
Center in 1st axis
Q216 (absolute value): Center of
the slot in the reference axis of the working plane
7
7
7
7
Center in 2nd axis
Q217 (absolute value): Center of
the slot in the minor axis of the working plane
7
7
7
7
Pitch circle diameter
Q244: Enter the diameter of
the pitch circle
7
7
7
7
Second side length
Q219: Enter the slot width. If you
enter a slot width that equals the tool diameter, the
TNC will carry out the roughing process only (slot
milling).
7
7
7
7
Starting angle
Q245 (absolute value): Enter the polar
angle of the starting point
7
7
7
7
Angular length
Q248 (incremental value): Enter the
angular length of the slot
7
7
7
7
Infeed for finishing
Q338 (incremental value):
Infeed per cut. Q338=0: Finishing in one infeed.
Example: NC blocks
52 CYCL DEF 211 CIRCULAR SLOT
Q200=2 ;SET-UP CLEARANCE
Q201=-20 ;DEPTH
Q207=500 ;FEED RATE FOR MILLING
Q202=5 ;PLUNGING DEPTH
Q215=0 ;MACHINING OPERATION
Q203=+30 ;SURFACE COORDINATE
Q204=50 ;2ND SET-UP CLEARANCE
Q216=+50 ;CENTER IN 1ST AXIS
Q217=+50 ;CENTER IN 2ND AXIS
Q244=80 ;PITCH CIRCLE DIAMETR
Q219=12 ;SECOND SIDE LENGTH
Q245=+45 ;STARTING ANGLE
Q248=90 ;ANGULAR LENGTH
Q338=5 ;INFEED FOR FINISHING