9 Calibration
Environmental influences (such as temperature changes or transport of the system) may lead
to a gradual decrease in data quality.
To increase data quality, T-Scan Collect offers the alignment calibration feature which the user
can – and should – perform on site if:
an upcoming measurement requires highest accuracy
local accuracy has decreased. This can manifest itself, for example, in poor statistics
when calculating a sphere fit
gaps occur in the data
wavy data is measured on actually planar surfaces
9.1 Calibrate measurement range
9.1.1 Preparation
In order to perform the measurement range calibration, you need a planar surface with diffuse
reflection.
Not suited are surfaces containing scratches, bumps, dents or similar faults. In general, a table
board should suffice the requirements. However, it is recommended to use a specified plane
which is optionally available.
9.1.2 Procedure
Open the Measurement range toolbox. The measuring mode
Alignment
will automatically be
activated. When opening the toolbox the status – symbolized by the traffic light – will be set to
red by default, indicating that no action has been performed yet.
To perform the calibration, two measurements have to be made. Take care to account for the
following:
The distance between scanner and plane has to be as constant as possible
The laser should hit the plane perpendicularly
The markers of the used scanner face should point as directly as possible towards the
camera
The orientation of the scanner must not change during measurement
Each measurement must contain at least 5000 points
For both measurements, the same scanner face must be used
Both measurements must be made on the same area of the plane
