HEIDENHAIN TNC 426 B

217HEIDENHAIN TNC 426 B, TNC 430
Before programming, note the following:
From the current position, the TNC positions the tool in a
linear 3-D movement to the starting point
. Pre-position
the tool in such a way that no collision between tool and
clamping devices can occur.
The TNC moves the tool with radius compensation R0 to
the programmed positions.
If required, use a center-cut end mill (ISO 1641).
ú
Starting point in 1st axis Q225 (absolute value):
Starting point coordinate of the surface to be
multipass-milled in the main axis of the working plane
ú
Starting point in 2nd axis Q226 (absolute value):
Starting point coordinate of the surface to be
multipass-milled in the secondary axis of the working
plane
ú
Starting point in 3rd axis Q227 (absolute value):
Starting point coordinate of the surface to be
multipass-milled in the tool axis
ú
2nd point in 1st axis Q228 (absolute value): Stopping
point coordinate of the surface to be multipass milled
in the main axis of the working plane
ú
2nd point in 2nd axis Q229 (absolute value): Stopping
point coordinate of the surface to be multipass milled
in the secondary axis of the working plane
ú
2nd point in 3rd axis Q230 (absolute value): Stopping
point coordinate of the surface to be multipass milled
in the tool axis
ú
3rd point in 1st axis Q231 (absolute value): Coordinate
of point in the main axis of the working plane
ú
3rd point in 2nd axis Q232 (absolute value):
Coordinate of point in the subordinate axis of the
working plane
ú
3rd point in 3rd axis Q233 (absolute value): Coordinate
of point in the tool axis
ú
4th point in 1st axis Q234 (absolute value): Coordinate
of point in the main axis of the working plane
ú
4th point in 2nd axis Q235 (absolute value):
Coordinate of point in the subordinate axis of the
working plane
ú
4th point in 3rd axis Q236 (absolute value): Coordinate
of point in the tool axis
ú
Number of cuts Q240: Number of passes to be made
between points and , and between points and
ú Feed rate for milling Q207: Traversing speed of the
tool in mm/min while milling. The TNC performs the
first step at half the programmed feed rate.
8.6 Cycles for Multipass Milling
X
Y
Q229
Q207
N = Q240
Q226
Q232
Q235
X
Z
Q236
Q233
Q227
Q230
Q228 Q225Q234Q231
Example NC blocks:
72 CYCL DEF 231 RULED SURFACE
Q225=+0 ;STARTNG PNT 1ST AXIS
Q226=+5 ;STARTNG PNT 2ND AXIS
Q227=-2 ;STARTING PNT 3RD AXIS
Q228=+100 ;2ND POINT 1ST AXIS
Q229=+15 ;2ND POINT 2ND AXIS
Q230=+5 ;2ND PNT 3RD AXIS
Q231=+15 ;3RD POINT 1ST AXIS
Q232=+125 ;3RD PNT IN 2ND AXIS
Q233=+25 ;3RD PNT IN 3RD AXIS
Q234=+85 ;4TH PNT IN 1ST AXIS
Q235=+95 ;4TH PNT IN 2ND AXIS
Q236=+35 ;4TH PNT IN 3RD AXIS
Q240=40 ;NUMBER OF CUTS
Q207=500 ;FEED RATE FOR MILLING
kkap8.pm6 30.06.2006, 07:04217
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