Hobbywing Axe system + Traxxas BEC?

[locollama]

Hi there everyone, first post here so apologies if this is the wrong spot/format. My awesome wife recently bought me a "project" to get me out of her hair during the current apocalypse. I'm completely new to rc and in the middle of my TRX4 Sport kit build. The hobby shop she purchased from said I should have everything I need. I have the Hobbywing Xerun Axe 540 motor/esc system and a Traxxas BEC 2262 for a Traxxas high torque servo? I'm confused on how to properly wire this system together and the instructions included with the esc reference a Traxxas esc with a connector my esc doesn't seem to have. I have tried searching both Google and these forums and although there's so much great information here, I still can't quite figure it out. Any help would be appreciated. Thanks!

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[Topher Builds]

Welcome!

You don’t need that BEC, that’s really only needed for the stock esc. The internal bec in the hobbywing axe will handle the traxxas servo just fine. Not sure which hobby shop you went to, but I think there’s a Crawl Space down in Colorado Springs and they are a great shop and resource.

 

[bbrigg]

The Traxxas ESC has an output connector for lights, BEC etc. I think it is a 2 pin JST connector from memory. Since you're using an Axe ESC you won't have that. This means that you need to add your own connection for the BEC which will require soldering.

You could connect the BEC by soldering the BEC input wires into the back of the XT60 power connector on the ESC. The wires on a 10A Castle BEC are pretty long but I'm not familiar with the Traxxas products. If your wires aren't long enough you will need to either get the matching JST connector or solder longer wires to the BEC. If you don't have the tools or have no experience soldering I would advise you to check if your LHS could do this for you.

Once you have battery power connected to the BEC you need to wire as shown in the attached image. Removing the red wire from the servo plug is quite simple. You just use a pin or precision screwdriver to lift the locking part of the connector as shown in the video.

https://m.youtube.com/watch?v=4Ri8i5ITI8o

You could just try using the internal BEC. I managed to run a 25kg servo from a stock Traxxas BEC while waiting for the external BEC. Traxxas only gives 1A while the Axe says 4A, maybe good enough.

~more facts, logic and personal responsibility would make the world a far better place than all the leftist ideas could dream of.

 

[locollama]

Thank you so much guys, my soldering skills are both elementary level and rusty so I'll try running without the BEC and set how it goes. Thanks again!

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[locollama]

The Traxxas ESC has an output connector for lights, BEC etc. I think it is a 2 pin JST connector from memory. Since you're using an Axe ESC you won't have that. This means that you need to add your own connection for the BEC which will require soldering.

You could connect the BEC by soldering the BEC input wires into the back of the XT60 power connector on the ESC. The wires on a 10A Castle BEC are pretty long but I'm not familiar with the Traxxas products. If your wires aren't long enough you will need to either get the matching JST connector or solder longer wires to the BEC. If you don't have the tools or have no experience soldering I would advise you to check if your LHS could do this for you.

Once you have battery power connected to the BEC you need to wire as shown in the attached image. Removing the red wire from the servo plug is quite simple. You just use a pin or precision screwdriver to lift the locking part of the connector as shown in the video.

https://m.youtube.com/watch?v=4Ri8i5ITI8o

You could just try using the internal BEC. I managed to run a 25kg servo from a stock Traxxas BEC while waiting for the external BEC. Traxxas only gives 1A while the Axe says 4A, maybe good enough.

~more facts, logic and personal responsibility would make the world a far better place than all the leftist ideas could dream of.

Thank you for this very helpful explanation, this is exactly what I was looking for thank you!

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[Greatscott]

DO NOT RUN TRAXXAS THE BEC!!!!

The Traxxas BEC puts out 3 amps, the Axe BEC puts out 4 amps.

 

[locollama]

DO NOT RUN TRAXXAS THE BEC!!!!

The Traxxas BEC puts out 3 amps, the Axe BEC puts out 4 amps.

10-4 Thanks, obviously I have a lot to learn!

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[Greatscott]

10-4 Thanks, obviously I have a lot to learn!

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Learning is what keeps me in this hobby, there is always something new, someone is coming up with a new way to do something, new technologies coming out, or you are relearning what you have forgotten.

Today's new kid is tomorrow's expert.

So...

The HW Axe does not have the most powerful internal BEC out there, but it is rated higher than the Traxxas external BEC; using the Traxxas BEC will give you less power. In this case, the 4A from the Axe system should be enough to power your rig; and, the wiring is straight forward, just plug the ESC into the RX and you are done.

Where you'll find the Axe's internal BEC lacking is on hard-core crawling situations where you have the steering bound up hard and the servo is pulling as much juice as it can. If you find this to be a problem, then your next step will be to go to a more powerful external BEC, like the Castle Creations 10A. For now, recommend connecting everything up, running your rig, and see what's what. If you start to notice glitching or brown outs when there is a heavy demand on your servo, then consider going to an external BEC.

 

[locollama]

Learning is what keeps me in this hobby, there is always something new, someone is coming up with a new way to do something, new technologies coming out, or you are relearning what you have forgotten.

Today's new kid is tomorrow's expert.

So...

The HW Axe does not have the most powerful internal BEC out there, but it is rated higher than the Traxxas external BEC; using the Traxxas BEC will give you less power. In this case, the 4A from the Axe system should be enough to power your rig; and, the wiring is straight forward, just plug the ESC into the RX and you are done.

Where you'll find the Axe's internal BEC lacking is on hard-core crawling situations where you have the steering bound up hard and the servo is pulling as much juice as it can. If you find this to be a problem, then your next step will be to go to a more powerful external BEC, like the Castle Creations 10A. For now, recommend connecting everything up, running your rig, and see what's what. If you start to notice glitching or brown outs when there is a heavy demand on your servo, then consider going to an external BEC.

This is really great advice thank you. I started in RC back in the late 80's with a Kyosho buggy but I have been out of the hobby for 25 years and I'm floored at how far the technology has come, it feels like starting over. I will build the kit like you said without the BEC now and see how it does, I can already tell I'm going to have just as much time "wrenching" as I will driving as I'm re-learning.


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