Electronic Assembly Help

[NKY Heli Guy]

My electronics are in and I am waiting for the E5 to come out like a kid waits for his toys the night before Christmas

I've never built a kit bigger than a 450 so the soldering the BEC and ESC seems a bit confusing to me. My first question is how do you fit the ESC and BEC wires into an EC5 pin? seems as though the wire for the ESC would be hard enough to get in by its self... see photo.


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[Chris Sexton]

You will have to trim the ESC wire tined area a bit to make it fit. Once it is hot it will move around and compress better

As for the BEC, I normal tie into the esc wire about 3/4 of an inch back from the EC5 and use shrink wrap to cover the connection. Just make sure if you do it that way you do the BEC wire first so you can get the shrink wrap on. I soldered one up, got excited and snapped it into the ESC housing and realized I had forgotten the shrink 

[flyalan]

+1 to what Chris said.

I addition I have added a deans or EC3 to the pigtail coming off the main pack.  Between the BEC and main pack that is.  This allow the BEC to be disconnected when needed.  I have found this helpful when you need to work on a bird.

Also if you will gently warm up your EC5's (or PRC 6's) with a hair dryer or monokot gun you will find them much easier to assemble.  The bullets pop in much easier.  You can also pop them back out if needed by warming.  I have done exactly what Chris mentioned and forgot the heat shrink.

Cheers
Alan

[NKY Heli Guy]

Guys thank you so much for the quick response. Alan I like the idea of the EC3 connector and removing BEC if need be. Just to clarify what is a pigtail coming off the main pack? Are you severing the wires of the ESC adding EC3 and bringing the BEC into the EC3? So confusing I've been all over the web looking for a demo on this and can't find anything.. I can't believe it as its so common on builds.


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[flyalan]

Glad to help.  Yes a pigtail is the wire you would solder to the main battery wire to feed the BEC.  Electrical term

Cheers
Alan

[NKY Heli Guy]

I'm sorry I feel so ignorant... if I add an EC3 connector between ESC and BEC the wire gauges are different I'm scared there won't be enough juice for the BEC. Unless you mean I tap into battery wire first, severe bec wire add ec3 connector etc. See photo, stuff is not connected but I'm laying things out as a visual.


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[stevehof]

The BEC will be fine with smaller wire and EC3 connectors. It only has to handle 10-15 amps at most. The motor/ESC and main battery will be drawing up to 100 amps, thus the need for thicker wires from the battery to ESC. So, use wire about the same gauge as BEC uses for the tap off of the ESC wires.

[NKY Heli Guy]

So I'm going to use the wires on the BEC to 1. Tap into the battery (by soldering to battery wire 1" from connector), 2. sever the BEC wires that are connected to battery to add both male and female EC3 connectors thus connecting the BEC... correct? Anyone have photos?

Thanks again for your help


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[Chris Sexton]

Exactly as you have it in your picture is perfect.

Don't mess with the battery side of the ec5. Keep everything on the esc side.


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[NKY Heli Guy]

Ok thanks Chris,

When tapping into the ESC wire do I just peal back the cover and solder strait to the wire or do I need to twist etc ?


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[Chris Sexton]

I usually strip a ring of shielding off the esc wire about 1/4" wide. Pre tin both the esc wire and the bec wire. Wrap it around the esc wire and solder them together. Make sure you use a good PVC shrink and cover it all up. 


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[NKY Heli Guy]

The EC5 connections with the Ice 120 is giving me hell. The wires for the ESC are to big for the opening to the casing. Every time I try and feed the wire through it pulls the insulation back. In addition if I could pull the wire through the blue casing the wires themselves won't fit in the metal bullets... is there another connector I should try these things suck!


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[Tommy Wagner]

The EC5 connections with the Ice 120 is giving me hell. The wires for the ESC are to big for the opening to the casing. Every time I try and feed the wire through it pulls the insulation back. In addition if I could pull the wire through the blue casing the wires themselves won't fit in the metal bullets... is there another connector I should try these things suck!


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Watch this it explains it well

http://m.youtube.com/watch?v=2MzCipN5B0I

I put the blue connectors after the soldering is done


Tommy

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[NKY Heli Guy]

Thank you for that I did get some solder on the outside of the connector. My CC 120 HV ESC has a gauge of 8 EC5 connectors accept AWG 10 if I have to shave the wires down to make an AWG 10 wire doesn't that defeat the manufacturers purpose of having AWG 8?


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[NKY Heli Guy]

PRC6 connectors appear to be s better choice with regard to bullet sizes and amps. Just don't know how to connect those. Damn there is do much to learn!


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