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120deg Hall Effect Sensors
The following diagram shows 120-degree hall-effect sensors. Notice that there is electrically 120 degrees between hall transitions.

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60deg Hall Effect Sensors
The following diagram shows 60-degree hall-effect sensors. Notice the Hall 3 signal is inverted (compared to 120-degree hall3) This changes the number of electrical degrees between the rising edge of the hall states.

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All of the hall motors Compumotor uses are 120degrees. If we use an inverter on Hall 3 we can change a 60degrees hall state to 120degrees and vise versa.