Drones and ROVs and Arduinos

A journey building drones and ROVs and other open hardware and Arduino based stuff

Building electronic chassis: ESCs and molex connector

One more month, and one more bit of assembling going on for my OpenROV #63: this time I assembled the ESCs on the echassis and connected all their wires to the molex connector.

It took me almost 3 hours:

  • first problem is that I didn’t buy the ESC suggested and that come with the kit, but I bought a similar ESC that was on promotion at the moment of buying, and which had to be exactly the same size. Unfortunately it was not: it was just 1-2mm wider but enough for the central ESC not to fit in its lodgement: so I had to dremel out the walls of the dividers.
  • Also the on-off switch of the ESC didn’t pass through its hole, so I had to dis-assemble it, and one through the hole, re-assemble it
  • The Molex connector doesn’t clip in place (this is a known problem) since the gap between the clip and the blockers is 2mm while the thickness of the wall is 3mm: that required more dremeling.
  • And finally, it was a big pain to crimp all those molex pins on top of the wires: I had a kind of crimping tool, but probably it was made for other types of molex pins and it did an awful job that at the end I decided to do it manually with normal pliers. But given the amount of molex crimping needed in the future (still power leads and tether on the ROV side and all the ESCs, power and tether on the cable side) I think I’ll go and buy a molext crimping tool.

But at the end everything came out pretty nice and tidy.

Till next time.

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This entry was posted on October 25, 2013 by in OpenROV and tagged , , , .

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