Frame Calculation From Three Measuring Points In Space (Meaframe) - Siemens SINUMERIK 840D sl Programming Manual

Coordinate transformations (frames)

5.6 Frame calculation from three measuring points in space (MEAFRAME)

Example
Geometry axis: A
Associated machine axis: X1
Program code
N10 G0 A100
N20 PRESETON(X1,50)
N30 A100
References
For programming of the preset offset in synchronized actions, see:
Function Manual, Synchronized Actions; Section: "Actions in synchronized actions" > "Set
actual value (PRESETON)"
5.6 Frame calculation from three measuring points in space
(MEAFRAME)
Function
The MEAFRAME function is used to support measuring cycles. It calculates the frame from
three ideal points and the corresponding measured points.
When a workpiece is positioned for machining, its position relative to the Cartesian machine
coordinate system is generally both offset and rotated in relation to its ideal position. For
exact machining or measuring either a costly physical adjustment of the part is required or
the motions defined in the part program must be changed.
A frame can be defined by sampling three points in space whose ideal positions are known.
A touch-trigger probe or optical sensor is used for sampling that touches special holes
precisely fixed on the supporting plate or probe balls.
Syntax
MEAFRAME(<ideal points>,<measuring points>,<quality>)
Meaning
MEAFRAME
<ideal points>
<measuring points>
288
: Function call
: 2-dim. REAL array containing the three coordinates of the ideal points
: 2-dim. REAL array containing the three coordinates of the
measured points
Comment
;Axis A travels to position 100.
; At position 100, machine axis X1 receives the new
actual value 50 => new actual value display:
- Axis X1, MCS: 50
- Axis A, WCS: 50
; Axis A travels 50 mm to position 100.
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
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