Siemens SINUMERIK 840D sl Function Manual page 892

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Detailed description

Predefined frame functions

Inverse frame

To round off the frame arithmetic, the part program provides a function which calculates the

inverse frame from another frame. The chaining between a frame and its inverse frame

always produces a zero frame.

FRAME INVFRAME( FRAME )

Frame inversion is an aid for coordinate transformations. Measuring frames are usually

calculated in the WCS. If you should wish to transform this calculated frame into another

coordinate system, i.e., the calculated frame should be entered into any desired frame within

the frame chain, the calculations below should be used.

The new complete frame is a chain of the old complete frame and the calculated frame.

$P_ACTFRAME = $P_ACTFRAME : $AC_MEAS_FRAME

The new frame in the frame chain is therefore:

Target frame is $P_SETFRAME:

$P_SETFRAME = $P_ACTFRAME : $AC_MEAS_FRAME : INVFRAME($P_ACTFRAME) :

Target frame is nth channel basic frame $P_CHBFRAME[n]:

n = 0: TMP = $P_PARTFRAME : $P_SETFRAME : $P_EXTFRAME : $P_NCBFRAME[0..k]

n <> 0: TMP = $P_PARTFRAME : $P_SETFRAME : $P_EXTFRAME :

$P_NCBFRAME[0..k] : $P_CHBFRAME[0..n-1]

k = $MN_MM_NUM_GLOBAL_BASE_FRAMES

$P_CHBFRAME[n] = INVFRAME(TMP) : $P_ACTFRAME : $AC_MEAS_FRAME :

INVFRAME($P_ACTFRAME) : TMP : $P_CHBFRAME[n]

Target frame is $P_IFRAME:

TMP = $P_PARTFRAME : $P_SETFRAME : $P_EXTFRAME : $P_BFRAME

$P_IFRAME = INVFRAME(TMP) : $P_ACTFRAME : $AC_MEAS_FRAME :

INVFRAME($P_ACTFRAME) : TMP : $P_IFRAME

Basic logic functions: Axes, coordinate systems, frames (K2)

Function Manual, 11/2006, 6FC5397-0BP10-2BA0

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