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The direction of the torque of the vernier knob determines the direction of the step of the 1-2-5 | The direction of the torque of the vernier knob determines the direction of the step of the 1-2-5 | ||
sweep speed switch. | sweep speed switch. | ||
This forms an electromechanical counter, similar to an odometer, with the 1-2-5 switch accumulating a count of | |||
the rotations of the main encoder shaft. | |||
However, unlike a counter, the units of the vernier are proportional to the position of the 1-2-5 switch. | |||
==Rotary Optical Encoder== | ==Rotary Optical Encoder== |