The method of emergency zero adjustment is simple and practical. But the motor must be removed from the equipment and rely on the equipment for debugging. After the test, install the equipment again. In fact, after a lot of zero adjustment tests, each servo motor has a zero speed static area with an angle less than 10 degrees, and a high-speed reverse area of 350 degrees. If you change an encoder occasionally, it's really too troublesome. Here's a very simple emergency method, which can be solved quickly.

Application		Elevator AC permanent magnet synchronous door machine
Feature		thin、high resolution
Model	［unit］	A-ZKD-25E-819.2BM0.25/12P-G12L05
Mechanical parameter
Dimension	［mm］	φ45*40
Shaft type		Hollow shaft
Shaft size /aperture	φ［mm］	8
Max. rotate speed	［r/min］	1000
Max. shaft load Axial / Radial	［N］	49/29.4
Operating temperature	［℃］	-20～+70
Protection level		IP40
Connection type		Spring Plate
resolution	［P/r］	8192
Electrical parameter
Output pattern		Line driver
Supply voltage	DC［V］	12
Response frequency / Response rate	［KHz］	30
Optional