basic wiring help pls.

[Rocket Ron]

Not much into electrics and need some fundamental help. I have an Extreme Flight Extra 300 EXP. I'm using a generic brand ESC and UBEC. I've always used units that are already wired together and this one leaves the wiring to be done by the builder.

My ESC has the 3 wires for the motor, 2 wires for the battery and and a 3 wire JR connector.

My UBEC has blach & red lead with no connector and a 3 wire JR connector.

How should this be wired? I would also like to put a switch on this plane so I don't have to take the hatch off to disconnect the power.

Any help would be appreciated!
Thanks!

[MikeC3D]

The motor leads will determine which way the motor turns, .
Pic's maybe....

[The_Wreck]

disconnect the red wire in the JR connector on the speed controller (I usually just pull the pin from the connector and tape it to the wire with electrical tape), if you are using the UBEC this prevents the speed controller from providing power to the receiver.

On the UBEC solder the red and black wires to the battery connector of the speed controller. This provides battery voltage to the UBEC when the speed controller is plugged into the battery. The JR connector on the UBEC is plugged into the receiver and provides the power for the receiver.

It does not matter how you plug in the 3 wires from the speed controller. Just plug them in and if the motor runs backwards, just reverse any two.

See diagram attached

[1bwana1]

The ESC will have three wires that go to the motor. You will usually have to solder "bullet" style connectors on both the motor wires and ESC. You can change the direction the motor turns by swapping any two of these wires when connecting the Motor to the ESC.

The battery leads will usually connect through a Deans style connector Red to Horizontal, Black to vertical.

The lead with the JR Connector will go to the Throttle channel of your receiver.

We need to know a little more about the UBEC, and possibly the ESC to be sure about the right way to connect this up. Post the brand, and model information of both the ESC, and UBEC, and I'm sure we can sort it out.

[Rocket Ron]

Wreck,
Your diagram is most helpful but clarify something for me. If the UBEC is plugged into the Rx / throttle port, where is the JR connector from the ESC plugged after I remove the red lead?

Also, where do I install an on/off switch in your diagram?

BTW....the ESC is a 70A Welgard on Grayson Hobbies web site. I believe these are all China made products....inexpensive but with no instructions whatsoever. Just a few instructions on line after clicking on the item.

Thanks!

[The_Wreck]

The UBEC is plugged into any other port on your receiver that is open, it only provides power. The JR connector from the speed controller is plugged into the throttle port of the receiver.

I attached a Castle Creations BEC manual it has a great wiring diagram in color.

I have never used an on off switch on an electric, I always plug the battery in and go fly. If you want to be able to plug the battery in and then turn it on from the outside you need something that can handle high current like:
http://www.atlantahobby.com/shopexd.asp?id=6952

[bodywerks]

There is really no simple switch that you can use. You do not want a switch between the main battery and motor, as there is obviuosly a TON of current flowing there and would require a MASSIVE switch.
If you just use a switch between the UBEC and rx you will only be cutting power to the rx but would still have a live ESC, so to speak. This can end very badly.
The Castle esc's have circuitry within them that keep them from arming until they receive an idle signal from the rx which makes them safer - your chinese knock-off unit might not have this. Regardless, once you plug the main battery into the esc, treat the plane like a live explosive. It's the safest way to go.
The hatch should be easily removeable. If not, make it that way so that you can just pop the hatch and disconnect the battery.
If you don't think that's possible you can use a Deans connector as a jumper:
1. cut the black wire between the ESC and battery connector and solder one end to the + side of a female Deans plug and the other end to the - side.
2. Make a cutout in the fuse side to fit the female deans into so you can plug the male side into it from the outside of the fuse. Glue it in place.
3. Take a male deans and solder a jumper between the + and - tabs of it with some 10 or 12awg wire.
4. When you plug that into the receptacle on the fuse you are live.

[Rocket Ron]

Thanks very much for your help. The Extreme Flight Extra comes with its own motor, ESC and UBEC and it does already have a switch to disarm the unit. It's a very nice "plug and play" unit that you don't have to program or ever change the 3 motor wires around. But......it's about $100 and I fried the first one so I went with a cheaper unit that you have to wire and program yourself.
BTW...the hatch IS easy to remove so I'll forego the switch.
Thanks again!

[The_Wreck]

The one you have is fine. All brushless speed controllers work the same way with the three wires. Most don't even come color coded. Some speed controllers have a switch to disarm their BEC. I run basically the same setup as you and after I lost a plane because a speedcontroller BEC burned out I always use a separate switching BEC.

[danielgpr]

[quote=1bwana1;886037]The ESC will have three wires that go to the motor. You will usually have to solder "bullet" style connectors on both the motor wires and ESC. You can change the direction the motor turns by swapping any two of these wires when connecting the Motor to the ESC.

On any electric combo over 600 or so watts I recommend soildering motor connections as I've seen too many connection issues related to "bullet" connectors causing increased resistance. IMO the only non "hard" wired connection on these bigger electric combos is the battery connection and if you use an arming connector as suggested earlier.
Dan

[ron_van_sommeren]

'Multiple choice' system wiring diagrams:
http://scriptasylum.com/rc_speed/_wiring.html

The LiPo pack and balancer wiring diagrams are very handy too:
http://scriptasylum.com/rc_speed/_lipo.html

Vriendelijke groeten Ron
www.yahoogroups.com/group/lrk-torquemax (diy brushless motor building)
www.yahoogroups.com/group/d-calc (e-flight calculator)
home.hetnet.nl/~ronvans