Uploaded July 2018 | Updated September 2026, 1 week ago
Improvements and interesting findings in balancing a rotating mass with my home made RPM counter (tachometer) and mass balance instrument. The main improvement was the addition of a moving average algorithm to stabilize the reaging of the angles despite secondary vibrations, and the addition of a connector with a proper cable to convey the signals coming from the sensors to an external instrument such as an oscilloscope.
One interesting finding was that le peak of the pressure signal sensed lead the actual position of the mass by 20 to 60 deg (depending by the rotor's mass in relation to the unbalancing mass), and an asymmetry between clockwise and counterclockwise sense of rotation.
Every suggestion and comment is welcome.
Link to the previous related videos:
Making of the instrument and theory of operation: youtube.com/watch?v=RlAIcnxVLZE
Test and makeshift balancing rig for testing: youtube.com/watch?v=iQ5vwq0JoKE
Improvements and interesting findings in balancing a rotating mass with my home made RPM counter (tachometer) and mass balance instrument. The main improvement was the addition of a moving average algorithm to stabilize the reaging of the angles despite secondary vibrations, and the addition of a connector with a proper cable to convey the signals coming from the sensors to an external instrument such as an oscilloscope.
One interesting finding was that le peak of the pressure signal sensed lead the actual position of the mass by 20 to 60 deg (depending by the rotor's mass in relation to the unbalancing mass), and an asymmetry between clockwise and counterclockwise sense of rotation.
Every suggestion and comment is welcome.
Link to the previous related videos:
Making of the instrument and theory of operation: youtube.com/watch?v=RlAIcnxVLZE
Test and makeshift balancing rig for testing: youtube.com/watch?v=iQ5vwq0JoKE
