It is a dynamometer, and as such, it measures force. In this case, torque. It is based in the electromagnetic brake principle and dynamic balance and all of this is done to measure the force of a motor or other rotating device in a dynamical way. Probably there is an electromagnet either in the box behind the dial or within the thick axis. The axis rotates at a speed imposed by the DUT (Device Under Test), which we cannot know what it was but we can assume it was some kind of motor/engine. The electromagnet generates a field that is induced in the axis/disc, which in turn generates a counterfield that attracts the axis to the electromagnet. This results in a braking effect. Changing the current through the electromagnet changes in turn the amount of force. The disc must have some kind of spring behind which is calibrated in force units. When the disc is in the "0" position, the force imposed by the rotating axis equals the one in the disc, thus balancing the system. One reads the force as a proportion to the magnetic field / current through the electromagnet. I hope I could explain it well, but the principle is really simple. The idea of using a magnetic brake is that there are few losses in the system (no friction as in a mechanical brake) and the calibration is easier and last a lot longer.
On Wednesday, December 11, 2019 at 2:51:31 AM UTC-3, Bill Notfaded wrote: > > Maybe it's not the wheel but the post on the axis and the wheel has some > adjustment on it? -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/2d8f7026-ea68-4fcf-9d9f-0def00dfa145%40googlegroups.com.
