HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 47)

TNC 425/TNC 415 B/TNC 407 2-9
2 Manual Operation and Setup
2.4 Tilting the Working Plane (not on TNC 407)
The TNC supports machine tools with swivel heads (the tool is tilted)
and/or swivel 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 for this function:
• 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 19 WORKING PLANE in the part program (see page 8-55)
The TNC functions for tilting the working plane are coordinate transforma-
tions. The transformed tool axis (i.e., as calculated by the TNC) always
remains parallel to the actual tool axis (the axis corresponding to the
positioning). 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 swivel tables
• Machines with swivel heads
For machines with swivel tables:
• You must bring the workpiece into the desired position for machin-
ing by positioning the swivel table, for example with an L block.
• The position of the transformed tool axis does not change in relation
to the machine-based coordinate system. Thus for example if you
rotate the swivel table – and therefore the workpiece – by 90°, 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 swivel table
(the so-called "translational" components).
For machines with swivel heads:
• You must bring the tool into the desired position for machining by
positioning the swivel head, for example with an L block.
• The position of the transformed tool axis (like the position of the tool)
changes in relation to the machine-based coordinate system. Thus
for example if you rotate the swivel head – and therefore the tool – in
the B axis by +90°, the coordinate system rotates also. If you
press the Z+ axis direction button in the MANUAL OPERATION
mode, the tool moves in X+ direction of the machine-based coordi-
nate system.
• In calculating the transformed coordinate system the TNC considers
both the mechanically influenced offsets of the particular swivel head
(the so-called "translational" components) and the offsets caused by
tilting of the tool (3D tool length compensation).
The functions for tilting the working plane are adapted to the TNC and the machine by the machine manufacturer.