HEIDENHAIN TNC 407 (280 580) ISO Programming - Manual (Page 85)

TNC 426/TNC 425/TNC 415 B/TNC 407 2 - 2 4
2 Manual Operation and Setup
407
2.7 Tilting the Working Plane
The functions for tilting the working plane are interfaced to the TNC and the machine tool by the machine tool builder.
On the TNC 426, the machine tool builder also determines whether the entered angles are interpreted as coordinates
of the tilt axes or as solid angles. Your machine manual provides more detailed information on this subject.
The working plane is always tilted around the active datum.
The TNC supports machine tools with swivel heads (the tool is tilted)
and/or tilting tables (the workpiece is tilted).
The program is written as usual in a main plane, such as the X/Y plane, but
is executed in a plane that is tilted relative to the main plane.
Typical applications:
• Oblique holes
• Contours in an oblique plane
There are two ways to tilt the working plane:
• 3D ROT soft key in the MANUAL OPERATION and ELECTRONIC
HANDWHEEL operation modes
• Cycle G80 WORKING PLANE in the part program (see page 8-55)
The tilting functions are coordinate transformations. The transformed tool
axis (i.e., as calculated by the TNC) always remains parallel to the actual
tool axis (the axis being positioned). The working plane is always
perpendicular to the direction of the tool axis.
When tilting the working plane, the TNC differentiates between two
machine types:
• Machines with tilting tables
• Machines with swivel heads
Machines with tilting tables:
• You must bring the workpiece into the desired position for machining
by positioning the tilting table, for example with a G00 block.
• The position of the transformed tool axis does not change in relation
to the machine-based coordinate system. Thus if you rotate the table—
and therefore the workpiece—by 90° for example, the coordinate
system does not rotate. If you press the Z+ axis direction button in
the MANUAL OPERATION mode, the tool moves in Z+ direction.
• In calculating the transformed coordinate system the TNC considers
only the mechanically influenced offsets of the particular tilting table
(the so-called “translational” components).