Always run a cap, always.

Thanks

Thanks

Hello All,
I recently dropped the rsx into my DEX410 and I have a problem. I am hitting lipo cutoff in about 5 mins and when I throw the lipo back on the charger its at 7.6 volts. Here is the setup:

RSX
TrakPower 6000mah 90c saddle pack
4.5 Trinity D3 EPA at 75%
19/87 gearing

Temps are good, motor at 160 and speedo at 110. Battery charges and balances fine. I checked the hotwire settings, its at 2s cutoff. There is definitely something going on, there is no reason for it to hit cutoff at 5min and 7.6V. Makes no sense to me, any ideas?

Next time when it cut off just turn off the car and wait few min. Turn it back on and go run it again to see how long it will run before it cut off again. If it cut off very soon I will swap a different battery to see any change in run time, if the cut off time is longer mean you have different problem but not the battery.

So, the internal temp sensor for the esc is cool... the LEDs lighting up is much quicker than digging for the temp gun...

But I've got a question (or 2) about the data logging.

1: when does it start/stop recording?
2: has anyone been checking the motor temps using it??? Is there a way to recalibrate the motor temp sensor? Or do not all motors have an internal temp sensor???

The reason I ask is that I'm pretty sure I cooked my motor... and I hooked up the data hotwire and took a look at the data it had logged...

It only logged 3 runs, for a total of about 6 minutes worth of driving.

-I temped my motor with a duratrax flash point, and it said 180... and the esc said 112.(and I had just 1 light.

I took a photo of my Laptop screen(sorry, out in the garage I don't have wifi, just 4g for the cell.)

This is what the data loggershowed me:



The other question that was raised by looking at my data logger.....

-why is it only showing that I hit 75% for the throttle?

Am I doing something wrong here??

Welp... I called the office.

I had the pleasure of talking with Michael.

Thanks for the help in understanding.

So, from what I understood he was telling me is that:

-The RSX starts to record as soon as you start your drive~
-it has enough memory(depending on how many of the items you choose to record, and at what resolution.) anywhere from 4 to 8 minutes worth of data.
-Throttle hitting 75% isn't 'abnormal' it depends more on the radio MFG and how their system is read by the data logger.
-my motor temp in the data recorded didn't show up as hot because it wasn't far enough into the run to actually get hot at that point. (because my first run was on my bench, the second one was in my garage just setting trims and getting set up.


If I am going to use this data logging feature, I think that it would be a huge advantage to be able to use it on my android device.

Thanks again for your time and help Michael.

I'm just now playing with the data logging, after have a few electronic hiccups that I couldn't figure out.. nor the people whom tried helping me could either.

However, one suggested it might be Battery Brown out due to a Bad Cell that drops Voltage when Amp demand is too much for it.

Problem: car races fine, then at some point during the I pull Full Throttle (ex.. coming out of turn) & the throttle sputters(dies then kinda works, dies, repeat). And then car has to sit dead for a few seconds before any throttle comes back.. etc...

I think the attached screen shot crop the "WHY" to my problem.
My Current Limiter was set to 85... So at about the 3min mark, if my Throttle exceeded ~80, the Voltage would drop ~6.2V - 5.9V, and ESC cutoff for 2S = 6.4V... So, one of the cells in my Saddle Pack cannot handle the Amp draw.
It happened to be an older 4200mAh 30C pack.. So, I'm currently testing my packs for Voltage Drops on discharge.

Have I read the data right?

Yesterday my car (XB4) ran fine in practice and when tried to power it up for the 1st qual I had steering, but lost the throttle. lights 1,2, & 6 lit up flashing so I rebound, recalibrated and tried a few different hotwire settings with no luck and was done for the day. Today I looked things over clipped the motor wires and powered up the ESC with no motor attached, things appeared to be good (led centered and moved with throttle/brake movements) however it didn't beep or make any noise as it usually does on power up. I'm stumped if I have a Motor or ESC issue at this point, should I solder things back up and see what happens? I also have a brand new 1700kv truggy motor I could use to rule out the motor, but hate to solder it up just to test things. I'll try Tekin Customer support tomorrow to see if they want me to send it in or can point me in the right direction.

In the mean time any advice or suggestions are welcomed

Thanks,

From my understanding; The ESC doesn't beep. It uses the motor to make the tones.

That makes sense then why I didn't hear anything then, hopefully the ESC is still fine and maybe I just had a bad solder joint??? I'll probably rewire/solder it up again and see if it works today. Hopefully I won't need to contact Tekin tomorrow....

Waa running vegas 248 it lost binding for no reason , went into spec mode 1s , my buds been running older hotwire software and couldnt be fixed, got home put vegas 250 on it and got it out of spec mode seems fine now but yet to race again yet(fingers crossed)

I am running a Reedy Mach 2 17.5 with the RSX, does not seem to work right with the data logger for motor temp. Anyone know if the Reedy Mach 2 is suppose to work with it and if I am maybe do something wrong

If you attended the RCX show you'd have seen this in person

You're dropping well below a typical 6v 2s lipo cut off range. So yes if your LVC is on, it's going to cut throttle.

You're also likely on the right track. A 30c pack isn't going to handle today's 4wd buggies with low turn mod motors. Especially one that is only 4200mah. Figure you'll get about 3-4 minute of full power before it starts going flat in an IDEAL condition.

Time for some new packs