90
12.3.6
Application Example
A force sensor consisting of a little mounting plate,
ceramic and strain gauge elements glued on the top
shall be tested upon its functionality.
The force sensor measures the external force applied
to the small ball (upper left corner in picture).
With the ELAX® linear motor slide and the XENAX®
servo controller the ball shall be touched and the
touching position detected. The touching position is
the offset of the actual force curve measurement.
This offset compensates the height tolerances of the
different measuring objects.
After touching position, the force curve of the
ceramic plate shall be recorded.
After an air gap of only 200 µm, the ceramic plate hits
the rubber buffer. At this position the force increases
steeper as the rubber buffer acts against the ceramic
plate. The maximal force is limited to approximately
12N ~150 x 10mA. Of interest is the increase in force
while the plate is bending and the position where the
force curve is making a kink upwards when hitting the
rubber buffer. For this example, five different sectors
are defined on the force-/way curve, which have to
be passed correctly.
Hereinafter you can find the according program
example 1) as stand-alone version programmed and
stored in the XENAX® servo controller 2) as Ascii
command set controlled via a superior controller.
Rubber buffer
Air gap
Ball
