Senton New 3s Senton, no power

[Scisor34]

So I purchased 2 new 3s Sentons about 2 weeks ago and a friend of mine have tried to use them twice, after about 8min runtime they stop running within a few seconds of each other and both lose power. I’ve shutting them off, unplug the battery for about 10 seconds and it will literally run at only 1-2mph. The temps on the motor and esc were 103-109. Running 1 on 2s SMC 5000 75c, the other on 2s gensacearespammers 5000 75c(?). After the few minutes runtime we’ve gotten, I check the battery status and they’ve been between 50-65%. Any advice is greatly appreciated! Also tried swapping in a freshly charged battery and it doesn’t help.

 

[Spaz04]

When they stop does your steering servo still function?

 

[Scisor34]

Yes

 

[Spaz04]

That resembles a thermal cut off. If I'm not mistaken all it takes to reset that is a flip of the power switch and if will run again (not recommended however). I'm not convinced that's what your dealing with here tho ?
Do u know what voltage per cell your at when this happens. I know you said 50-65% but volts per cell may give the folks on here a little more to go off of.

 

[Overpowerrc]

What voltage were the batteries at? They don’t drain to zero volts every run. If you did that you destroy the batteries

 

[Jackjax801]

Sounds like the LVC is kicking in early, heard of that happening with some BLX 100's recently. Best to contact horizon for a warranty claim. The cell voltages after that happening would indicate that better.

 

[Arrmature]

My BLX100 also shuts off prematurely, usually after about 5 minutes or so on a 5000 mAh 50C 2S battery. It's not a thermal issue - ESC temp is under 100 degrees when it does it. A quick recycle of power clears it up though and it runs fine until the LVC kicks in. My problem is that the LVC is 6.15V so it's way too low.

 

[Scisor34]

Battery voltage is 4.0+ on all four batteries I’ve tried, and when I put the exact same batteries in my Typhon or Granite they work perfectly fine.
And it’s definitely not thermal shutdown because I have a temp gun and am fairly experienced with rc’s, it’s just a Mystery to me about what’s happening, I can’t figure it out.
the electronics surely should be able handle 100-110 degrees Fahrenheit.

 

[mikeshandssay]

I swapped out my ESC for this reason. I didn't have this exact problem, but if even on a hill it would try 2 times to go forward and then just turn off power to the motor. Was driving me nuts. This firmware they are running sounds terrible.

 

[Scisor34]

I swapped out my ESC for this reason. I didn't have this exact problem, but if even on a hill it would try 2 times to go forward and then just turn off power to the motor. Was driving me nuts. This firmware they are running sounds terrible.

Yes, it’s extremely frustrating and I haven’t had this issue with my Typhon or Granite. I talked to Horizon today and they want
Me to send in both ESCs to be reflashed but Idk if I want to go that route or just buy a different esc. What did you go with? Anybody have any ideas on a decently priced alternative? I don’t need top of the line, just something reliable.

 

[mikeshandssay]

Yes, it’s extremely frustrating and I haven’t had this issue with my Typhon or Granite. I talked to Horizon today and they want
Me to send in both ESCs to be reflashed but Idk if I want to go that route or just buy a different esc. What did you go with? Anybody have any ideas on a decently priced alternative? I don’t need top of the line, just something reliable.

I went a little top of the line route. https://www.hobbywingdirect.com/products/xerun-xr8-sct-pro-esc?variant=25945588616

 

[Goingnorth75]

I had issues with a couple of mine and found that doing a reset of the esc and rebindeing radio fixed some issues, I also fond that I had different results doing reset. 1 senten i did 5 resets before it solved my problem, each reset gave a different problem. All 3 3s blx's I have cut out on 2s right around 3.2 so i use low voltage alarm to keep track or when mine cuts out on 3s I know my kids on 2s should be about done so we all quit when the first one cuts out.

 

[ptsWolfman]

I never had this happen on my Granite, but my Senton had a similar issue. It almost seemed like when I was stuck, or on a steep incline/angle, and I had to give it some throttle, too much feathering of the controls (so I wasn't full throttle out of a ditch launching it into the world) and after a few seconds of this it would just cut out (no power, etc). I don't remember if my steering worked or not.
I ended up doing what 95% of all Arrma owners do and replaced the STX2 radio with something else (I went with the FlySky GT3B for the Senton -- decent radio though I like the DumboRC better, or its previous version which is sold under different names ( Rcharlance 2.4G 6CH transmitter ) just feels more sensitive than the FlySky).
Either way, swapped the radio and didn't have this cut-off issue any longer.
I'm not sure if this is your issue -- but a new radio will really wake up the car anyway

 

[mikeshandssay]

I never had this happen on my Granite, but my Senton had a similar issue. It almost seemed like when I was stuck, or on a steep incline/angle, and I had to give it some throttle, too much feathering of the controls (so I wasn't full throttle out of a ditch launching it into the world) and after a few seconds of this it would just cut out (no power, etc). I don't remember if my steering worked or not.
I ended up doing what 95% of all Arrma owners do and replaced the STX2 radio with something else (I went with the FlySky GT3B for the Senton -- decent radio though I like the DumboRC better, or its previous version which is sold under different names ( Rcharlance 2.4G 6CH transmitter ) just feels more sensitive than the FlySky).
Either way, swapped the radio and didn't have this cut-off issue any longer.
I'm not sure if this is your issue -- but a new radio will really wake up the car anyway

Luckily I had an extra RX Futaba around and YES, try an RX/TX first and it will help - I'm not 100% sure why.

 

[Scisor34]

I replaced the Spectrum radio after the first run to work with my Flysky that I run All of my trucks on.