Self-calibration method for positioning of light fixture and light fixture

A self-calibration method for positioning of a light fixture, wherein an absolute encoder for indicating a rotation angle of the light fixture, and a driving device for driving the light fixture to rotate are included, the self-calibration method comprises steps of:

• S1) before shipment, setting a plurality of preset positioning reference points around a circumference of the absolute encoder, driving the light fixture to rotate by the driving device and acquiring a corresponding first output value of the absolute encoder at each preset positioning reference point;
• S2) after shipment and before positioning the light fixture, driving the light fixture to rotate by the driving device, and acquiring a second output value of the absolute encoder, when the second output value is equal to the corresponding first output value at a certain preset positioning reference point, taking the preset positioning reference point as a calibrated positioning reference point, the calibrated positioning reference point being taken as an initial position for positioning;
• and
• S3) positioning the light fixture according to the calibrated positioning reference point.