You mean if you flick the fan blades it while it's off? That's normal. What you're feeling is a magnetic cogging in the motor that makes the fan want to prefer certain positions evenly spaced around it's rotation while at rest.Is it normal for a 12vdc fan not to spin freely?
I see no video. But it sounds like it's having trouble starting up. Does it start running okay if you take a pencil and flick the blades to get it going? (don't use your fingers!)I uploaded a video.
It's like it doesn't stay on constantly and only spins every second. 12vdc 1Amp fan connected to a 12vdc 1amp adapter. What am I missing here?
Suppose to be 50cfm.
The fan startup current is greater than its running current. During startup, it might be driving the power supply into an overcurrent shutdown and automatic restart.it still only gets power every second.
This is a DC-fan it's not a "cap-start" in the sense where you need to produce a phase shift between voltage and current to begin to get a motor spinning. A big cap could help the wall-wart deal with that initial inrush current but I'm feeling it's probably going to need to be too big. I would just try another wall-wart.So every once and a while if I keep tapping the power source it will build fan speed and run properly. So am I going to have to get some capacitors for a cap start set up? Is there anything else I can do?