HEIDENHAIN TNC 640, User Manual, Page: 581 / 948

Special Functions | Lift off tool at NC stop: FUNCTION LIFTOFF
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
581
12.16 Lift off tool at NC stop: FUNCTION
LIFTOFF
Programming tool lift-off with FUNCTION LIFTOFF
Requirement
Refer to your machine manual.
This function must be configured and enabled by your
machine tool builder. In the
CfgLiftOff
(no. 201400)
machine parameter, the machine tool builder defines the
path the control is to traverse for a
LIFTOFF
command.
You can also use the
CfgLiftOff
machine parameter to
deactivate the function.
In the
LIFTOFF
column of the tool table, set the
Y
parameter for
the active tool.
Further information: "Entering tool data into the table", page 242
Application
The
LIFTOFF
function is effective in the following situations:
In case of an NC stop triggered by you
In case of an NC stop triggered by the software, e. g. if an error
has occurred in the drive system.
In case of a power failure
The tool retracts from the contour by up to 2 mm. The control
calculates the lift off direction based on the input in the
FUNCTION
LIFTOFF
block.
You can program the
LIFTOFF
function in the following ways:
FUNCTION LIFTOFF TCS X Y Z
: Lift-off with a defined vector in
the tool coordinate system
FUNCTION LIFTOFF ANGLE TCS SPB
: Lift-off with a defined
angle in the tool coordinate system
Lift-off in the tool axis direction with
M148
Further information: "Automatically retracting the tool from the
contour at an NC stop: M148", page 499