A few users have reported electrical shorts in their wiring with the QAV500 Power Distribution Board. When the surface of the PDB is scratched it is possible for copper to show through. If both sides of the mask are scratched a short can happen. To prevent this issue from happening, we suggest to place nylon washers under the screw heads of the screws that are holding the arms and spacers. See the below picture which points out the placement of the washers for the arm screws, but again, we suggest to place washers under all the screw heads on the same side.
We are also in the process to manufacture re-designed PDBs that will eliminate the risk of these electrical shorts. The new PDB will be available in 2-4 weeks and we will make it available to existing customers that would like to upgrade their PDB at a reduced rate.
Why not supply frame with nylon nuts and bolts.
That way in a crash they snap and save the arms from bending.
I Reckon Ill do this to my frame.
Yes, you can give this a try.
I would also place nylon washers at the position of the 1cm spacers.
Agreed. I updated the alert above.
I’m going to solve the issue using 3mm nylon washers.Importing a new PDB would cost me too much for the tax man and importing fee. IGetting the frame to Belgium costed me another 50 EUR VAT and 25 EUR import handling fee.
I don’t like the idea of using nylon bolts and nuts as these points hold the frame together and define the sturdiness of it.
I’m also adding 4 extra 1cm spacers under the orange bobins so the top frame weight is resting on both bottom plates.
All good ideas. The top frame is not that heavy and extra spacers under the bobbins are not required, but it can’t hurt either.