Brown-Out Issues?
 

Having problems w/my TLR SCTE 2.0

I was having what I thought were brown-outs. Anywhere from 2-4 minutes into a 5 or 6 minute race, I would start having issues. The truck would just basically stop. No go, no steering. Usually after heavy braking into a corner and then attempting to accelerate out of a corner. After a second or two it would start again w/o intervention.

I was using a cheaper Savox servo (SC0251MG). Added a glitch buster cap, no help. Went to a better servo (Savox SC1258TG), no difference.

Just for kicks, I removed the fan that was on my motor (Novak 4.5t 550). No difference.

Thought maybe my ESC (Novak Havok Pro) was having issues, went to my spare, no difference.

Thought maybe my receiver (Spektrum SR301) was having issues, went to my spare, no difference.

I'm back to thinking it's the ESC. I check the temps on it after having issues, but it's always in the middle of the 'acceptable operating range'. I'm kinda at a loss now. I don't have a spare motor to try, nor do I have another battery to try (using a new SPC 6500 mAh, 65c).

Anyone got any ideas?

It's your spektrum receiver, I had the same problem with my old scte 2.0, hobbywing xerun combo with savox 1258 sr3300t rx

I do have an Orange Rx I could try.

To double check if it's your receiver, prop up the truck on a stand and give full throttle, fast steering etc. and watch the rx light to see if it blinks, it could be barely browning out as well where you could barely see the light blink on/off, the orange rx might work as well, I would usually brown out at the end of the straight into the sweeper full throttle to brake and turning sending into the wall a few times, I use my savox in my t4.2 with mt4 tx/rx with no cap/glitchbuster and no glitching

I've tried to get it to do it on the bench with no luck. I was holding the rear tires stationary, alternating throttle/brake and steering. It never stuttered, but I was not looking at the light on the Rx.

yea check the light the rx while on a stand or someone holding it and do what you would do while driving/racing, what radio do you use

Spektrum DX3C

I was using the dx2s and both are dsm not dsm2, not only was I getting brownout issues with the rx but when racing or a lot of people on the driver stand I would get interference when other trucks would be close to me so it's possible you could be getting brownouts on the rx along with some interference, just check your rx to see if the light goes on off etc., it might be time for a new radio system

It might be the battery, I noticed that one of the batts I have had a cell that is a lil lower than the other, and if I run that batt the esc glitches and the thing acts crazy!! Just an idea:)

That's interesting... the worst spot for my issues is the farthest parts of the track from the drivers' stand. They just happen to be hard brake/acceleration zones, too.

Just make sure u have a good bind with the rx/tx and see if it does it in that point again!!

A good BEC, and good batteries.
/Thread

Spektrum and Savox are not friends, they are enemies :)

Every time somebody asks me about radio problems and I ask what radio and what servo they answer Savox and Spektrum

I can't figure out why with the tons of Savox issues threads people still buy them, 'cheap' is not an answer if you want to race

4WD SC is THE most demanding power wise of any class

So... Why does it work perfectly for 3 minutes? If they "don't get along", wouldn't they not get along from the second the switches go on?

Because the esc has only so many amps to send the receiver and servo at the same time, usually 5amps at 6v. When the pack is fresh it's easily doable, but after a few minutes when the voltage has dropped a little the savox servos are known to pull high amps basically using what is available not leaving much for the receiver.

If your at full steering and powering out of a turn, the voltage drop from the motor digging deep and the servo pulling higher then normal amps(savox is known for this) then the receiver "browns out"