Esc smoking

[Shoeless]

Well, I was crawling with my trx 6 and it wouldn't move. Went to the machine and there was smoke coming out of it. It looked like from the motor at 1st. When I turned it off it kept running. I had to unplug the battery. Now every time I plug it in for one second the esc starts smoking. This is only the maybe the 4th time I've had out. So I'm guessing the esc is fried. Anyone think its anything else? What esc should I replace it with? I'm not very impressed with the traxxas esc.

 

[tntpoof]

call or send a email to traxxas . well since we dont know if its brushed or brushless no 1 can give you a replacement. Id switch motors also..

 

[Shoeless]

Its brushed, the original motor.

 

[Shoeless]

I also just changed the servo today to the savox 1212. Could that fry the esc?

 

[Shoeless]

Also, if I go brushless what combo do u recommend?

 

[TurboChargedHonda]

I also just changed the servo today to the savox 1212. Could that fry the esc?

Yeah... it's the ESC. You might have fried the internal BEC. The stock XL-5 HV only provides 1 amp of current, so it's not unusual for it to get overtaxed by the current demands from the servo (especially Savox).

If staying brushed, I recommend the Hobbywing 1080 ESC (best value). If going brushless, the Hobbywing Fusion, Hobbywing Axe, or the Castle Mamba X Slate are the most popular. There are also others that run high-turn 2-pole sensored brushless, but you can't really get much speed out of them.

 

[Shoeless]

Does the hobbywing 1080 esc need a bec for the savox?

 

[tntpoof]

servo just might have done that to esc. Id do the old Single D cell in glass of water to test motor.I left motors long ago Id go brushless in that rc.also might want to find 1 with bec that can handle that servo..after reading sure that servo has a tone or torque but the ma draw is low compared to rate 3 amp actual is 9.7 amps draw on a hard corner with half rc speed..I fran into a time frame of about 4 years when the bec on esc would fail . they would run fin 1 week next week servo would have half its sweep. bench test was 100 field test was less than 50. went to ubec 20 amp and run that ubec on every thing over 1/16 scale .no smoke from another esc.. see a esc can let the smoke out in a few different ways. fets blow big smoke over 10 seconds . when a bec fails.. a puff or 2.about a second.

 

[tntpoof]

with any savox id get a Ubec.. esc do have bec just does it have enough to feed servo.esc and any other things your sing on it. always remove center rx plug wire b4 powering on

 

[Shoeless]

with any savox id get a Ubec.. esc do have bec just does it have enough to feed servo.esc and any other things your sing on it. always remove center rx plug wire b4 powering on

I'm not following what you mean when you say remove the rx plug wire be powering on.

 

[Shoeless]

What motor servo combo can handle the savox if I go brushless, or do I still need the bec?

 

[Shoeless]

What motor servo combo can handle the savox if I go brushless, or do I still need the bec?

I ment motor Esc combo

 

[Shoeless]

Hobbywing AXE 540L R2-FOC Waterproof Sensored Brushless Combo w/2800Kv Motor​

If I go with this combo does it eliminate the need for the bec or the ubec?

 

[tntpoof]

if you add a ubec the rx center wire on receiver plug needs to be removed so esc bec wont smoke
the + wire from esc to rx needs to be slid out of plug and secured so it can't make contact

 

[Shoeless]

if you add a ubec the rx center wire on receiver plug needs to be removed so esc bec wont smoke
the + wire from esc to rx needs to be slid out of plug and secured so it can't make contact

Gotcha, I just looked up the ubec and saw exactly what you were talking about.

 

[TurboChargedHonda]

Just an FYI, if you are planning on using a BEC, this is the best way to wire it (there are multiple ways to wire it, but based on your circumstances this is the best:

With this configuration, the receiver and (diff lock + transmission) shift servos can get power from the ESC's internal BEC (6V) and only the servo can get power from the UBEC at a higher voltage like 7.4V (receiver and shift servos cannot take anything higher than 6v).

As for getting a BEC or not (or which BEC to get), you will need to look at the stall current of your servo (listed below from the Savox website) and the supply current of the BEC.

Savox 1212 Specs:

• Running Current (no load): 120mA @6.0V, 150mA @7.4V
• Stall Current (at locked): 8200mA @6.0V, 10000mA @7.4V

Hobbywing Axe R2 FOC Specs:

• 6V/7.4V Switchable
• BEC Output: Continuous Current of 6A

Ideally, you would want to have the BEC current output to be higher than the stall current of the servo, but you wouldn't be constantly stalling the servo, so 6A would be fine as long as you do not stall the servo. If you think you will be straining the servo fairly often to the point of stalling (or almost stalling), it is recommended that you get a BEC of at least 10A. (Assuming the servo is running on 7.4V; will be 8.2A if running on 6V)

Hope this gives you an overall idea

 

[Shoeless]

Just an FYI, if you are planning on using a BEC, this is the best way to wire it (there are multiple ways to wire it, but based on your circumstances this is the best:

With this configuration, the receiver and (diff lock + transmission) shift servos can get power from the ESC's internal BEC (6V) and only the servo can get power from the UBEC at a higher voltage like 7.4V (receiver and shift servos cannot take anything higher than 6v).

As for getting a BEC or not (or which BEC to get), you will need to look at the stall current of your servo (listed below from the Savox website) and the supply current of the BEC.

Savox 1212 Specs:

• Running Current (no load): 120mA @6.0V, 150mA @7.4V
• Stall Current (at locked): 8200mA @6.0V, 10000mA @7.4V

Hobbywing Axe R2 FOC Specs:

• 6V/7.4V Switchable
• BEC Output: Continuous Current of 6A

Ideally, you would want to have the BEC current output to be higher than the stall current of the servo, but you wouldn't be constantly stalling the servo, so 6A would be fine as long as you do not stall the servo. If you think you will be straining the servo fairly often to the point of stalling (or almost stalling), it is recommended that you get a BEC of at least 10A. (Assuming the servo is running on 7.4V; will be 8.2A if running on 6V)

Hope this gives you an overall idea

So you recommend a bec even with

Hobbywing AXE 540L R2-FOC Waterproof Sensored Brushless Combo w/2800Kv Motor​

 

[HPIguy]

You always need a standalone BEC, it doesn't matter what receiver you are running. Savox makes great servos (my go to actually), but they are power hungry. I even ran BECs in my race rigs after a brown out induced crash not only ended my race prematurely, but also cost me $50.

 

[TurboChargedHonda]

So you recommend a bec even with

Hobbywing AXE 540L R2-FOC Waterproof Sensored Brushless Combo w/2800Kv Motor​

Yes, a BEC is recommended for your application.

 

[Shoeless]

Yes, a BEC is recommended for your application.

Good to know Thank you!