BDK74

iTrader: (55)

Having a little problem on my Rc8be

Setup as follows:
Tekin rx8/1900, minimum current limiting.
46t spur, 19t pinion
2x gens ace 5000/40c packs run in series 2x2s
All power going to ESC is 10g wire
Deans ultra plugs on all

No problem with 5 min mains or practice, but when it's extended mains or on a larger track, one of the deans pugs from the inside batt de-solders. This is the battery 2nd in line in the series. It's - cable goes to the ESC and it's positive cable goes to the other batt.

It is consistently this connector in this position regardless of which pack it is (I have 4)

I am pretty confident with my solder joints.

Any opinions?

Am I just asking too much from the deans plugs?


I have 5.5 mm bullets in the mail but dont necessarily want to change everything over.

Thanks for any input

hotrod87

iTrader: (252)

Anytime I've had this happen its been a poor solder job. By myself of course.

AreCee

iTrader: (1)

I race a similar setup and have never created a load strong enough to cause the wires/battery to heat up so high like 500+ degrees F to melt solder.

Check to see if you have any binding to cause an overload like that.

BTW I ended switching to 5mm bullits because I buy my batteries from Hobbyking and that's what they come with and soldering 10ga wires to Deans is difficult but not impossible with a very good hot iron. You'd be surprised how easy it is to have a cold solder with those fat wires as a heat sink.

BDK74

iTrader: (55)

Yea, I suspect my solder joints. As careful as I am, those large wires are really hard for me to get on a deans plug.

Everything else on the car is tip top. No binding or issues.

It isn't all the time either. Only after a long main where I am really pushing the car, Lots of throttle and brake. Temps for the ESC and motor are all in check.

Nobicus

You could also try a different type of solder. I haven't had be best results with the lead free stuff.

The other thing to try is getting some flux, and dipping you wires into that before soldering.

BDK74

iTrader: (55)

Thanks for the replies

I've been using flux for all. May go over all my connections and re-solder before I switch over to the bullets.

TOM MAR

iTrader: (3)

If you really want to stay with the deans plugs, one of the guys posted this.
A little pricey, but it seems to work well.

http://www.vigilante-rc.com/

nexxus

iTrader: (315)

I think half the issues happen when ppl try to get too fancy with lead free solder this and flux that.

I use basic Jaycar (Radio Shack) 60/40 Solder always have, and never had a connection desolder or even get excessively hot.

and I use a cheap hardware store vice to hold things steady, don't know why you need a custom jig for it!

BDK74

iTrader: (55)

Another thought,

It may be possible I am damaging the solder joint from disassembly of the connection. Deans plugs aren't exactly the best for taking apart. I often find myself inadvertently grabbing some wire too. Which over time surely weakens the joint.

TOM MAR

iTrader: (3)

I did that for years & it is a pain working in tight quarters. It is only an option, no need question it!