Mahr Digimar 817 CLM, Operating Instructions Manual

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Mahr GmbH • Digimar 817 CLM
4.5.6 Coordinate transformation - aligning the workpiece
arithmetically
A workpiece can only be aligned when both axis are measured. Only
bores, shafts and index circles can be used for alignment.
For some workpieces, the origin of workpiece coordinates is not
situated at an edge of the workpiece, but in bores or shafts. Since the
workpiece coordinate system is rotated with respect to the coordinate
system formed by height measuring instrument and base plate, the
coordinates need to be converted. This conversion is called coordinate
transformation or arithmetic workpiece alignment.
The coordinate transformation uses two elements (two shafts or two
bores) to determine the origin and the X-axis of the workpiece
coordinates.
The origin of coordinates is placed in the center of the element that
was selected first. The X-axis (abscissa) runs through the centers of
the selected elements. The Z-axis is with the first characteristic
intersects perpendicular to the X-axis. Additionally the coordinate
system can be rotated around the origin coordinate.
To rotate the coordinate system:
There are 3 possibilities to rotate the coordinate system.
1. A transformation without rotating the coordinate system.
2. A transformation is performed via the X and Z coordinates of the
second characteristic. The rotation angle is calculated from the
coordinate values that have been entered. The coordinate system
is rotated so that second characteristic does not lie on the X-axis,
but rather on the coordinates that are entered
3. A transformation takes place when a rotation angle is entered.
Positive rotation angle = clockwise direction
Negative rotation angle = anti-clockwise direction
The maximum entry for a rotation angle of ± 180° must not be
exceeded!
Z
Z
1
X
1
X
1
4
2
3