Weird problem, suggestions welcome!!

[Kamikaze]

I tried tapping off of 5 cells on my 2.2 to get a little more juice to the servo's, I unhooked the esc's to test it out, I put the positive on the positive of the first cell and the negitive on the negitive of the 5th cell. I had both the 645 and the 755 1/4 scale servo plugged up when I did this. Now it sparked when I conected the positive and the vehicle went dead. So I returened everything to the way it was and nothing worked so I thought I had fried the rx. Well after tring everything I discovered that every thing works as long as the 645 isn't pluged in. Doesn't matter what channels are were. Then I got another 645 from my toolbox and it works fine. So did I fry the front servo??? and if so why didn't it hurt the rx or the 1/4 scale servo. Also did I tap the cells corectly.

[Moondust1950]

i kno nothing about electronics but it may be your BEC that was fryed

[Kamikaze]

Like I said everything works just like it did, untill you plug in the front servo then it cuts everything off, if I plug up another identical servo it works fine. It's not the BEC, the esc's weren't even hooked up.

[Moondust1950]

ok

[I B RACIN]

Originally Posted by Moondust1950

i kno nothing about electronics but it may be your BEC that was fryed

Then why did you post anything....


It sounds like you did it right, I would guess that the 645 was ready to go, and the extra volts did it.

The 645s are cheap servos, and you get what you pay for with servos.
The elect. package inside a 645 is cheap compaired to other servos that cost more, you will most likly find something fryed inside on the board.

I have tryed the cheap servo route and broke them all, I have 3 645s that all just quit. I never broke the gears it was always the the board fryed. I now run 94358s in my 2.2s. and 5995s in the super trucks

By the way you truck is Badd ***.

I B..

[Moondust1950]

Originally Posted by I B RACIN

Then why did you post anything....


It sounds like you did it right, I would guess that the 645 was ready to go, and the extra volts did it.

The 645s are cheap servos, and you get what you pay for with servos.
The elect. package inside a 645 is cheap compaired to other servos that cost more, you will most likly find something fryed inside on the board.

I have tryed the cheap servo route and broke them all, I have 3 645s that all just quit. I never broke the gears it was always the the board fryed. I now run 94358s in my 2.2s. and 5995s in the super trucks

By the way you truck is Badd ***.

I B..

That was the only suggestion i had

[JohnRobHolmes]

Just a bad servo.

so everything works with the 5 cell tap without the servo?

[Kamikaze]

Originally Posted by johnrobholmes

Just a bad servo.

so everything works with the 5 cell tap without the servo?

I don't know I just touched the wires and the front fried so I never solderd it on to try it. I hate the 645's I just got them in a trade, I have stripped them both, one twice and not this one is fried. I'm about to put a 755 1/4 scale on this 2.2, I have never had a single problem with the 755's, no gears stripping or frying or smoke or nothing. And there only $27. Oh well I had already ordered some of those mg whacha-ma-calits that Dez is always preaching about, maybe they won't crap out on me.

[Kamikaze]

Holy Crap!!! I just tried the 5 cell tap again, I can't belive the differance. I can't even move the 1/4 scale were before I could get it to give and it would stall out the bec, I had 6 amps at 5 volts but this is way better. Now do I have to cut the red wires to the esc's or can I just disconect the power switch wires?? I just cut off the switch and solder the wires together anyway.

[JohnRobHolmes]

leave the switch on and leave it in the off position. Or, remove the red wire from the rx plug and hardwire the ESc on.

[Kamikaze]

Ok so the switch if off, the red wires are gone, the servos work great when I turn the tap on, but when I plug the battery into the esc's the ground wire on the tap starts to smoke weather the tap is turned on or off, whats going on????

[JohnRobHolmes]

You have a loop. Microgoat had the same thing going on. I think you need to remove the black wire from the esc rx connector as well. forgot about that.

[Kamikaze]

Yep just read that Smokin' Mamba BEC?

So if I remove the red and black wires from the esc it should work then??

[JohnRobHolmes]

definatly.

[Kamikaze]

OK I removed the red and black wires from the esc's, pluged in the battery, no smoke, turn on the tap, no smoke servos work, now the esc's don't pick up a signal.

Then I took the tap off, rewired it the way it was and the esc's work, why wont they pick up a signal with just the white wire attached???

[JohnRobHolmes]

Do you have your esc switch turned on now?

[Kamikaze]

I had to, they didn't come on.

[JohnRobHolmes]

Make sure the rx plug from the esc is in the right polarity and in the right slot. If this is the case then your BEC must be non-functional on the ESC. As long as your ESC is receiving control power, it should speak to the RX without a hitch through just the signal wire.


Enough acronyms for you?

[Kamikaze]

Arghh forget it, I'm going back to the bec. It must be the amazing quality of the Mopeds, anybody want to sell me 4 super roosters????

[JohnRobHolmes]

Put a 100 ohm resistor to connect the red and black bec wires on the moped. It sounds like the BEC might need a load to get running like some digital power supplies.

otherwise, screw it.