HEIDENHAIN TNC 620, User Manual

Page: 241 / 521

Setup | Tilting the working plane (option 8)
Machine types
When tilting the working plane, the control differentiates between
two machine types:
Machine with tilting table
You must bring the workpiece into the desired position for
machining by positioning the tilting table accordingly, for example
with an L block.
The position of the transformed tool axis
does not change
relative to the machine 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 key in the
Manual operation
mode, the tool moves in Z
+ direction.
When calculating the active (transformed) coordinate system, the
control considers only the mechanically influenced offsets of the
particular tilting table (the translational components).
Machine with swivel head
You must bring the tool into the desired position for machining
by positioning the swivel head accordingly, for example with an L
block
The position of the tilted (transformed) tool axis changes relative
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 also rotates. If you
press the Z+ axis direction key in the
Manual operation
mode,
the tool moves in the X+ direction of the machine coordinate
system.
When calculating the active coordinate system, the control
considers both the mechanically influenced offsets of the
particular swivel head (the translational components) as
well as offsets caused by tilting of the tool (3-D tool length
compensation).
The control only supports the
Tilt working plane
function in combination with spindle axis Z.
Position display in a tilted system
The positions displayed in the status window
(ACTL.
and
NOML.)
are referenced to the tilted coordinate system.
In the machine parameter
CfgDisplayCoordSys
(no. 127501) the
machine manufacturer defines the coordinate system in which the
status display shows an active datum shift.
Limitations on working with the tilting function
The
Actual-position capture
function is not allowed if the Tilt
working plane function is active
PLC positioning (determined by the machine tool builder) is not
possible.
5
HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
241