HEIDENHAIN TNC 640 User Manual page 149

Fundamentals, File Management | Fundamentals
The Global Program Settings function (option 44)
additionally provides the Additive offset (M-CS)
transformation for tilting axes. This transformation is
added to the OFFSET values from the preset table and
pallet preset table.
Another feature is OEM-OFFSET, which is available only
to the machine tool builder. OEM-OFFSET can be used to
define additive axis shifts for rotary and parallel axes.
All OFFSET values (from all the above OFFSET input
possibilities) together difference between the ACTL. and
the RFACTL position of an axis.
The control converts all movements in the machine coordinate
system, independent of the reference system used for value input.
Example of a 3-axis machine tool with a Y axis as oblique axis, not
arranged perpendicularly to the ZX plane:
In the Positioning w/ Manual Data Input operating mode, run
an NC block with L IY+10
The control determines the required axis nominal values from
the defined values.
During positioning the control moves the
The RFACTL and RFNOML displays show movements of the Y
axis and Z axis in the machine coordinate system.
The ACTL. and NOML. displays only show one movement of the
Y axis in the input coordinate system.
In the Positioning w/ Manual Data Input operating mode, run
an NC block with L IY-10 M91
The control determines the required axis nominal values from
the defined values.
During positioning the control only moves the
The RFACTL and RFNOML displays only show one movement of
the Y axis in the machine coordinate system.
The ACTL. and NOML. displays show movements of the Y axis
and Z axis in the input coordinate system.
The user can program positions related to the machine datum, e.g.
by using the miscellaneous function M91.
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
Y and Z machine axes.
Y machine axis.
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