Also consider factors such as tolerance requirements, manufacturing processes, functional requi-
rements and optical characteristics of the part. Features with loose tolerances may not need to be
inspected at high magnification. Select the magnification best suited for the requirements.
5.5 Focus Strategy
Accurate measurement requires proper focus of the image
. When measuring flat parts, always
first ensure that the stage glass has been leveled. When using zoom optics,
first focus the image
at highest magnification, then decrease the magnification to the desired level.
5.6 Parts Fixturing
The part must be fixtured securely to prevent part movement during measurement
.
Also, proper
alignment of the part to the stage can aid in measurement. If the part is off-axis from the stage,
X-Y-Z measurements will not correlate as well with the part dimensions. Aligning the part with the
X, Y and Z axes of the system will improve dimensional measurements. Orientation errors, or
skew errors, can also be removed by creating a reference frame based on the part before taking
measurements. Please see the M3 software manual for details.
5.7 M3 Software Operation
M3 software operation is outside of the scope this hardware-oriented user manual. Please refer to
the separate MetLogix M3 software manual.
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