- #1

Special One

- 32

- 1

- Homework Statement
- f = 64.3 [Hz]

w = 1930 [RPM]

- Relevant Equations
- w=2*pi*f

Question: Why does the oscilloscope double almost the exact value of rotational speed measured by Tachometer?

Rotational speed from Tachometer = 1930 [RPM]

Frequency of 1 period = 64.3 [Hz] which means 3857.91 [RPM]

The output waveform of hall-effect sensor is attached.

Can you have any explanation please?

Rotational speed from Tachometer = 1930 [RPM]

Frequency of 1 period = 64.3 [Hz] which means 3857.91 [RPM]

The output waveform of hall-effect sensor is attached.

Can you have any explanation please?