1.
Before running an accuracy check, it is advisable to review the nominal values in the
settings dialog
:
1.
If you are using a barbell, enter the sphere radii into the corresponding fields.
Sphere 1
corresponds to the red,
Sphere 2
to the blue sphere displayed in the toolbox. The
correct
Distance
between the two spheres also needs to be specified.
If you are using a single sphere, you are free to choose which field to use for the
nominal radius. Take care to select the correct sphere (red/blue) later in the
evaluation.
2.
If
Fit with free radius
is disabled when you perform the accuracy check, the software
will try to fit a sphere with the given radius into the data. This may lead to an error
message if it is not possible to calculate a reasonable result, e.g. because the given
radius differs significantly from the actual data.
3.
In the
Remove outliers
fields, you can specify how many of the worst fitting points will
be removed before sphere fit and plane fit. A setting of
1 Sigma
will eliminate
approximately 32%,
2 Sigma
approximately 5% and
3 Sigma
approximately 3 ‰ of the
most off-size points.
4.
For the sphere fit,
Visible points only
is disabled by default because, in most cases, you
will want to check the entire sphere, including the rear side.
For the plane fit,
Visible points only
is enabled by default because usually only the
