systems the risk of failure caused by tribologic problems is
high because the influence of friction and wear is more significant
than in systems of “usual” size. Therefore the hportance
of performance testing is even higher than in
“macro-systems”. Some measuring methods for the torque
of small motors have been summarized by Franek and
Matmer [I]. All these methods are not suitable for the extremely
small torques and dimensions of micromotors.
Therefore a completely new sensor design has been developed
that meets the requirements for the characterization of
rotating micro-systems in industrial applications.