The Bottom Plate
The bottom plate of the X250 acts both as a power distribution board and as structural support for the frame. The power distribution carries current for both the ESC's and the LED's that on each arm. There is even a little tiny switch soldered into the plate so you can turn the LED's on and off. The first thing I did was align my arms with the holes on the bottom plate and secure them in place with the screws and nylon standoffs provided.
Note: The bottom plate came with the power cables already soldered into the VCC and GND ports.
Note: The bottom plate came with the power cables already soldered into the VCC and GND ports.
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I repeated this for all four arms and tightened down all the bolts to make sure those LED solder mounds made good contact with the bottom plate.
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The bottom view of the arms and the bottom plate:
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