HEIDENHAIN TNC 410 - Manual (Page 190)

177 HEIDENHAIN TNC 410
Before programming, note the following:
From the current position, the TNC positions the tool at
the starting point 1, first in the working plane and then in
the tool axis.
Pre-position the tool in such a way that no collision
between tool and clamping devices can occur.
ú Starting point in 1st axis Q225 (absolute value): Min.
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): Min.
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): Height
in the spindle axis at which multipass-milling is carried
out.
ú First side length Q218 (incremental value): Length of
the surface to be multipass-milled in the main axis of
the working plane, referenced to the starting point in
1st axis
ú Second side length Q219 (incremental value): Length
of the surface to be multipass-milled in the secondary
axis of the working plane, referenced to the starting
point in 2nd axis
ú Number of cuts Q240: Number of passes to be made
over the width
ú Feed rate for plunging Q206: Traversing speed of the
tool in mm/min when moving from set-up clearance to
the milling depth
ú Feed rate for milling Q207: Traversing speed of the
tool in mm/min while milling.
ú 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.
ú Set-up clearance Q200 (incremental value): Distance
between tool tip and milling depth for positioning at
the start and end of the cycle.
8.7 Cycles for Multipass Milling
X
Z
Q200
Q227
Q206
X
Y
Q226
Q225
Q219
Q218
Q207
Q209
N = Q240
Example NC blocks:
71 CYCL DEF 230 MULTIPASS MILLNG
Q225=+10 ;STARTNG PNT 1ST AXIS
Q226=+12 ;STARTNG PNT 2ND AXIS
Q227=+2.5 ;STARTING PNT 3RD AXIS
Q218=150 ;1ST SIDE LENGTH
Q219=75 ;2ND 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