Why can't the XAG motor of the spray drone rotate, and it feels a lot of resistance trying to manually rotate it?

1. It may be that the three-phase wire terminal of the ESC bottom board is short-circuited, and the three-phase wire terminal needs to be expanded normally. You can use a tool to increase the distance between the three terminals during installation.

2. It may be the problem of the motor or the connecting wire. Check whether the related circuit of the motor is connected normally. You can exchange it with another motor accessory and cross-check.