quark glitch?
 

Hi, I have a E-maxx with a quark 125 controller with a neu 1515/1y, 8000 maxamps batteries, and stock transmission locked into 2nd gear. I am using the strobe slipper with the 51 tooth spur and a 16 tooth pinion.

I have a problem and I will explain it exactly as it happens: I accelerate to high speed. I brake and slow down to medium speed (Such as when I enter a turn). As soon as I accelerate again (Such as once I've entered the turn), the motor seems to seize for a split second, cause a shock in the drivetrain. Besides sometimes flipping the car over, this has also caused problems with my front diff. It only happens in this specific situation.

I have talked to quark about it and they assured me they have never encountered this problem before, and that is probably isn't a problem with the ESC.

Has anyone else had problem, or can anyone provide any insight into what might be causing it?

I suspect it might have something to do with the free-play in the e-maxx transmission.

It sounds like you might have a bad ring gear in one of the diffs. I only say that because it happened to me.

Its not that, I just rebuilt the front and rear diffs. This isnt anything like a diff slipping, it seems like the controller is confused as to where the rotor is, and tries to turn it the wrong way.

Still looking for ideas.

What radio are you using? Could be a form of glitching. Also, what are the temps of the ESC/batteries when this happens?

What setting is your LVC on?

I'm using a spectrum, and I dont see how it could be radio glitching since it only happens in the specific situation I mentioned. I am also able to recreate the problem every time, regardless of motor or ESC temps.

I usually keep the quark set at "Li-poly Normal", I also tried it at li-poly high and the same thing happens.

That sounds like the problem that the MM's had with bad connectors, where it seemed to lose the rotor and momentarily and either hit reverse or brakes for a split second. Is it possible that it may be a bad motor connector?

I suppose thats possible, I found the quark connectors were hard to solder without having something to hold the wire in place. I will try to re-solder them. Do you have any tips on how to solder the quark connectors?

With a very hot iron- get the heat in there quick to avoid heating the motor/esc internally. What kind of timing are you running? it might be worth setting it to soft to see if that makes a difference?...

Yea, I have a 220 watt weller soldering gun that i used, I think that should be enough. I have tried it on all the torque settings, and its currently on the lowest one.

Also thanks for any help.

Try running it on NiMH mode, just to see if that works?

But, I also think it might be your radio... I was using stock radio and i had the weirdest glitches ever, and like you said, I could recreate them.

Try to use race mode without safe mode.
I solve the same kind of problem with this setup.
It could be some kind of glitch to cause the problem.
However, I burn my esc with wrong polarity after I found the solution.
Pretty sad.