Keba KeMes A2 Series, Руководство по эксплуатации

Страница: 20 / 56

A2xx Operation and handling
Operating instructions V1.01
20
© KEBA
surement, which is why a correct angle calculation on curved workpieces
and within the bending radius (important for workpieces with obtuse angles)
is not possible.
The measurement range lies between 30° and 150°.
1 ... Measurement range
For practical use of the measurement device, be aware that the surfaces of
the workpiece scanned by the laser along with its respective reflective prop-
erties form a functional part of the overall measurement system and thus in-
fluence the actually achievable accuracy. The achievable accuracy is also
affected by proper handling of the measurement device as well as by the en-
vironmental conditions; also refer to Chapter "Technical data".
The following influencing factors can affect measurement precision and re-
peat accuracy and must be taken into consideration:
Influencing factor Description
Alignment of the device to the
workpiece
The longitudinal axis of the housing of KeMes A2xx must
be aligned parallel to the bending edge and tilted as little as
possible in order to be symmetrical between the two legs of
the workpiece. Observe a minimum distance of 20 mm be-
tween the mirror and the workpiece surface. The measured
distance to both legs should be equal if possible.
Poor planarity
Unevenness on the surface of the leg being measured
must be prevented.
Non-homogeneity of the reflec-
tive properties
Different, uneven reflective properties of the legs being
measured on the test specimen (e.g. dirt, scratches, coat-
ing, discoloration, oils, welding chips, patches of corrosion,
etc.) must be prevented. If necessary, the test piece must
be cleaned, or the selection of the measurement field must
be changed.
Dirt Dirt on mirror and lens of the device must be prevented.
Vibrations
If a measurement takes place on a machine, the legs of
thin sheets have the tendency to vibrate or reverberate
when relaxing. Make sure that the sheet metal legs do not
vibrate during the measurement operation.