Motor not working

[Cnrk4255]

Hi all I have abit of a weird one here replaced all 4 motors on my p3s that’s fine however on one of the motors I tried to snip the wires on the old motor and the new one and tried so solder the old wires to the new ones so that I wouldn’t have to soldier onto the main board that didn’t work because of some varnish they put on the wires so I had to solder the other 3 directly to the main board they all work fine but the one I snipped I had to connect with wire connectors ( the ones where you put each wire in one end and crush the connector to keep them in place) that was fine but after one flight I landed it and noticed that that motor wasspinning very slow compared to the rest. When I tapped the prop the motor reduced its speed so much that I could actually seethe prop turning if you know what I mean so I took all the prop off and spun up the motors there seemed to be a grinding like noise coming from the arm I don’t know if it came from the motor or esc praying it came from the motor. Put the props back on anddecided to give the arm a wack after that it started to work again however if you give it another wack it startsspinning slow again it also doesn’trespond to my input when it’s spinning slow I don’t see how it could be the esc as after I gave it a wack it started working the grinding like noise is worrying do

Any help will be much appreciated thanks.

 

[stuka75]

but the one I snipped I had to connect with wire connectors ( the ones where you put each wire in one end and crush the connector to keep them in place)

Based on earlier posts, the motors wires must be soldered directly to the main board.

 

[N017RW]

First...Duplicating posts is not proper here.

Now, these ‘wire connectors’ are not going to overcome the issue with the insulation on the wire strands either.

You’re going to have to replace/rewire the motor properly.

 

[Cnrk4255]

OK that’s fine I have one of the older motors which was fine I’ll just pop that one back in thanks

 

[Fly Dawg]

I had to solder the other 3 directly to the main board they all work fine but the one I snipped I had to connect with wire connectors ( the ones where you put each wire in one end and crush the connector to keep them in place)

This was simply an error in your technique as far as the crimping goes. That thin varnish will come off with 99%ISA. Being that you are having an "Intermittant" issue, that is most likely the problem. You should use insulating crimp splices or heat shrink after you clean and re-strip.

 

[Cnrk4255]

Ye I’ll put in the old motor and get back to you just one more thing the whining noise could that have come from the esc as I don’t see how they could make a noise