Motor acting strange

[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.

 

[Steve7777]

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.

Can I just mention that with no paragraphs your block of text wasn't so easy to read. Good formatting and punctuation might get you more replies..

You need to take off that crimp connector and sand off the varnish from that motor cable. Then do a good connection solder job on the cables and all might be well.

I don't know about the 'grinding' noise - but redoing the connection properly is the first thing to try. Then if you still have the 'grinding' noise, you can move on to the next stage to sort the noise out.

 

[Cnrk4255]

Ok thanks