Special Functions | Lift off tool at NC stop: FUNCTION LIFTOFF
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HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
529
12.13 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 234
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 487
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