Calculation Method - Siemens SINUMERIK 840D sl Function Manual

Measurement (M5)
8.4 Setting zeros, workpiece measuring and tool measuring
8.4.2.4

Calculation method

Activating the calculation
The calculation is activated by an HMI operator action with PI service _N_SETUDT. This Pl
service can accept one of the following parameter types:
Type
1
2
3
4
5
6
7
8
9
The modification becomes apparent immediately in the reset state; in the stop state, the
frame is not applied until the next start.
Note
The PI service can be executed only in the reset and stop states. In the case of workpiece
measurement, the calculated frame is activated immediately with type no. 7. In the case of
tool measurement, the PI must not be dispatched with type no. 7, since a zero point does not
have to be activated.
Activation in the Stop state
The new WCS positions are refreshed in the Stop state. When execution of the part program
is resumed, the distance to go in the interrupted block is deleted and the axis approaches
the end point of the next block from its current position.
Therefore, it is possible to start a spindle in MDA mode or in part program and execute
preset actual values and scratching or execute another measurement, e.g. with M0, in the
part program in the Stop state.
Measuring cycles
The calculation in the measuring cycles is performed according to the predefined function:
INT MEASURE( )
MEASURE() delivers a result frame that can be read via $AC_MEAS_FRAME:
● The result is the translation and rotation from the setpoint values recalculated on the
● The result frame is calculated as follows:
612
Description
Active tool offset
Active basic frames
Active settable frame
Global basic frames
Globally settable frames
Calculating workpiece zero point or tool lengths
Activate workpiece zero point (write scratching)
Activate external work offset
Activate active tool carrier, TCOABS and PAROT
selected frame.
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions