Rotating Dynamometers with Milling
A rotating dynamometer (RCD) is inserted directly into the
machine spindle while the tool is connected with the RCD via the
respective tool holder. The RCD rotates as well during operation
due to the connection with the machine spindle. An RCD has
two advantages over stationary dynamometers: On the one
hand, the dynamics of the measurement instrument is not influenced
by changing masses, as the tool mass remains constant.
On the other hand, it is possible with the aid of the built-in
multi-component sensor to measure the torque Mz directly during
the entire measurement, thus making it possible to have,
for example, precise statements regarding the wear on the tools.
The utilization of rotating dynamometers also permits the calculation
of the active force Fa in simple steps from the forces Fx and
Fy. The cutting force in effect Fc, in addition to the normal cutting
force FcN, can be calculated with the aid of the torque Mz and the
active force.