HEIDENHAIN TNC 620 User Manual page 543

When tilting the working plane, the TNC differentiates between
two machine types:
Machine with tilting table
You must tilt the workpiece into the desired position for
machining by positioning the tilting table, for example with
an G01 block.
The position of the transformed tool axis
relation to the machine coordinate system. Thus if you rotate
the table—and therefore the workpiece—by 90° for example,
the coordinate system
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 "translational" components).
Machine with swivel head
You must tilt the workpiece into the desired position for
machining by positioning the swivel head, for example with
an G01 block
The position of the transformed tool axis changes in relation
to the machine coordinate system. Thus if you rotate the
swivel head of your machine—and therefore the tool—in the
B axis by 90° for example, 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 coordinate system.
In calculating the active coordinate system, the TNC
considers both the mechanically influenced offsets of
the particular swivel head (the so-called "translational"
components) and offsets caused by tilting of the tool (3-D
tool length compensation).
The TNC only supports tilting the working plane with
spindle axis G17.
HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
Tilting the working plane (option 8) 14.11
does not change
does not rotate. If you press the Z+
in
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