HEIDENHAIN TNC 426, User Manual

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HEIDENHAIN TNC 426, TNC 430 313
8.7 Cy
cles f
o
r multipass milling
U Starting point in 1st axis Q225 (absolute value):
Minimum point coordinate of the surface to be
multipass-milled in the reference axis of the working
plane
U Starting point in 2nd axis Q226 (absolute value):
Minimum-point coordinate of the surface to be
multipass-milled in the minor axis of the working
plane
U Starting point in 3rd axis Q227 (absolute value):
Height in the spindle axis at which multipass-milling is
carried out
U First side length Q218 (incremental value): Length
of the surface to be multipass-milled in the reference
axis of the working plane, referenced to the starting
point in 1st axis
U Second side length Q219 (incremental value): Length
of the surface to be multipass-milled in the minor axis
of the working plane, referenced to the starting point
in 2nd axis
U Number of cuts Q240: Number of passes to be made
over the width
U Feed rate for plunging 206: Traversing speed of the
tool in mm/min when moving from set-up clearance
to the milling depth
U Feed rate for milling Q207: Traversing speed of the
tool in mm/min while milling.
U Stepover feed rate Q209: Traversing speed of the
tool in mm/min when moving to the next pass. If you
are moving the tool transversely in the material, enter
Q209 to be smaller than Q207 If you are moving it
transversely in the open, Q209 may be greater than
Q207.
U Set-up clearance Q200 (incremental value): Distance
between tool tip and milling depth for positioning at
the start and end of the cycle.
Example: NC blocks
71 CYCL DEF 230 MULTIPASS MILLNG
Q225=+10 ;STARTNG PNT 1ST AXIS
Q226=+12 ;STARTNG PNT 2ND AXIS
Q227=+2.5 ;STARTNG PNT 2ND AXIS
Q218=150 ;FIRST SIDE LENGTH
Q219=75 ;SECOND SIDE LENGTH
Q240=25 ;NUMBER OF CUTS
Q206=150 ;FEED RATE FOR PLUNGING
Q207=500 ;FEED RATE FOR MILLING
Q209=200 ;STEPOVER FEED RATE
Q200=2 ;SET-UP CLEARANCE
X
Y
Q226
Q225
Q219
Q218
Q207
Q209
N = Q240
X
Z
Q200
Q227
Q206