HEIDENHAIN TNC 640, User Manual, Page: 526 / 948

Special Functions | Global Program Settings (option 44)
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
Additive basic rotat. (W-CS)
Refer to your machine manual.
Your machine tool builder can also disable individual
settings possibilities within the
Global Program Settings
function.
The
Additive basic rotat. (W-CS)
option specified in the
Global
Program Settings
function provides a coordinate transformation in
the W-CS workpiece coordinate system.
Further information: "Workpiece coordinate system W-CS",
page 151
The additive basic rotation specified in the
Global Program
Settings
function is effective after the basic rotation or basic
3-D rotation and thus is based on this movement. This means
that the value is not simply added to the SPC value of
Preset
management
.
Further information: "Measuring 3-D basic rotation", page 769
and page 766
Control display
Like the basic rotation from
Preset management
(SPC column),
the additive basic rotation specified in the
Global Program
Settings
function does not affect the actual position display.
The general status display shows the following icons:
Active basic rotation from
Preset management
Active basic 3-D rotation from
Preset management
Additive basic rotation active (default icon of the
Global Program Settings
function)
The control displays the additive basic rotation values on the
GS
tab of the additional status display, the values from
Preset
management
can be found on the
POS
tab.
Application example
Rotate the CAM output by -90°:
CAM output for gantry-type milling machine with a large range
of traverse of the Y axis
Available machining center with a limited range of traverse of
the Y axis (X axis has the required range of traverse)
The workpiece blank is clamped with a 90° rotation (long side
parallel to the X axis)
Thus, the NC program must be rotated by 90° (algebraic sign
depends on the preset position)
The 90° rotation is compensated by means of the
Additive
basic rotat. (W-CS)
option
Open the
Global Program Settings
function
Activate the
Additive basic rotat. (W-CS)
option, specifying 90°
Reselect the NC program
The control considers the 90° rotation for all axis positioning
movements.