I have a 60rpm, 110V synchronous as motor with start capacitor (provided by motor seller so properly sized) that I've wired according to the instructions, but cannot get to spin with any appreciable force: I can easily stop it with a light touch. The motor is 6W, so it should be capable of more torque than what I'm observing.
The motor has 4 wires coming out of it: one green, one red, and two yellow which I believe are the start winding wires. The instructions call to join the yellow wires together and attach to one of the legs of the capacitor, and to attach the red and green wires to opposite legs of the capacitor. My connection looks like this:
red wire
power______ |______________
| |
green wire |cap|
power______ |__________|___|
|
yellow wires
Could this be a bad cap? If not, are there other reasons for the motor to be delivering sub par torque? Thanks in advance.