Continuity between frame and Negative on XT60

[Apathy]

Title says it all, I'm getting continuity between my Chameleon frame and the Negative connection on my XT60. Not getting a short across the positive and the negative though and it flies, I'm just concerned that if it lands in wet grass I could easily short the quad out. I'm thinking it might be because I'm using the metal M3 bolts for the stack as provided with the Chameleon frame.

Thoughts?

 

[GJH105775]

Title says it all, I'm getting continuity between my Chameleon frame and the positive connection on my XT60. Not getting a short across the positive and the negative though and it flies, I'm just concerned that if it lands in wet grass I could easily short the quad out. I'm thinking it might be because I'm using the M3 bolts for the stack as provided with the Chameleon frame.

Thoughts?

Check screws in the motors and make sure the ESCs aren't touching the frame. Pretty much just make sure no electronics touch the frame without an insulator. Sometimes a solder pad sticking down will touch, and if a negative gets shorted to that in flight it can cause a fire, battery failure, or frame de-lamination mid air. Great thing to check, hopefully you find it. Most flight controllers and many other parts ground to the mounting screws so you could have a slow short that is draining your battery faster than needed and maybe heating parts up.

 

[Apathy]

Check screws in the motors and make sure the ESCs aren't touching the frame. Pretty much just make sure no electronics touch the frame without an insulator. Sometimes a solder pad sticking down will touch, and if a negative gets shorted to that in flight it can cause a fire, battery failure, or frame de-lamination mid air. Great thing to check, hopefully you find it. Most flight controllers and many other parts ground to the mounting screws so you could have a slow short that is draining your battery faster than needed and maybe heating parts up.

Apologies it isn't the Positive connection and the frame that I have continuity with, it's the negative side on the XT60 and the side of of the carbon, which makes sense as like you said the PCB's in the stack will ground through the mounting holes and as I'm using metal bolts, that's what must be causing the continuity. Is this a problem? Should I insulate the bolts or swap them out for Nylon bolts instead?

 

[mozquito1]

Swap em out. Vtx antenna sma connection needs to be separated from frame aswell.
Depending how you done it..

 

[RENOV8R]

There's no need to isolate the vtx antennae from the frame. All mine are mounted directly through the frame.

 

[mozquito1]

If that was mine I would just put 2 rubber washers either side of the top plate.
I ripped a antenna off the vtx. It killed everything except the vtx. Go figure.
I don't think 25mw bounce back is enough to fry the board. Then again it might be.
I just got lucky.