Incremental servomotor encoder zeroing method！

In this discussion, the incremental encoder output signal for the square wave signal, can be divided into commutation signal with the incremental encoder and incremental incremental encoder, the general incremental encoder with two Phase square wave pulse output signals A and B, and the zero signal Z; commutation signal with the incremental encoder in addition to the output signal with ABZ, but also have mutual difference of 120 degrees of electronic commutation signal UVW, UVW each Of the number of cycles per revolution corresponds to the number of poles of the motor rotor. The alignment between the phase of the UVW electronic commutation signal of the incremental encoder with the commutation signal and the phase of the rotor pole, or the phase of the electrical angle, is as follows:
1. Using a DC power supply to the motor through the UV winding is less than the rated current of the DC, U into, V out, the motor shaft is directed to an equilibrium position;
2. Observe the U-phase signal and Z-signal of the encoder with an oscilloscope;
3. Adjust the relative position of the encoder shaft and the motor shaft;
4. While adjusting, watch the encoder U phase signal edge, and Z signal, until the Z signal stabilizes at the high level (in this default Z signal normal low), lock the encoder and the motor relative Positional relationship;
5. After the motor shaft is rotated back and forth, the Z-signal can be stabilized at the high level every time the motor shaft is free to return to the equilibrium position, then the alignment is effective.
After removing the DC power supply, verify the following:
1. Observe the U-phase signal of the encoder and the UV-ray back EMF waveform of the motor with an oscilloscope.
2. Turn the motor shaft encoder, the encoder U-phase signal rising edge and the motor UV back EMF waveform from low to high zero-crossing coincidence, the encoder Z signal also appears in the zero-crossing point.

absolute encoder, incremental encoder, servo motor encoder,hybrid encoder, non-magnetic en

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