Kaetwo's Tekin FX-R Review...

[Just Zach]

I figured this would be the best thread to post this up in but Jim from Thunder Power gave me a bit of info:

[FONT=&quot]Anyone using lipo batteries must set your esc voltage cut off at 3.3v per cell min. If you use the standard 3.0v that is default in Tekin and most other ESC’s it will cause the batteries to go below the safe threshold and could cause battery damage. The Tekin has a custom set up, however you must use a Hotwire to activate it. It is recommended that the batteries be kept charged 80% or more to get the best performance and not go below the 3.3v per cell threshold. Low battery voltage may also cause glitching and cause loss of control of the vehicle.[/FONT]

 

[EeePee]

Been there...

Then why do they program the thing to have a 3.0v cutoff?

 

[Rockcrawler]

I think the 3.0v cutoff was probably ok for the rigs we use to run. But now getting into the bergs and some of the other rigs that draw power quicker, I could see why it would need to be changed to 3.3v. I guess the rigs now are draining power much quicker.

 

[Randy P]

:ror:

Here ya go. Can the B1R handle a 3S lipo with a 55 turn motor?

We don't rate it for that type of application. However I've seen it done. That is why the FXR is made...

 

[jreckner]

Is anyone running the losi 3c crawler pack with their fx-r??? I would like a small lipo like this but want to make sure it will work ok. I am running either a 55t or 35t.

thanks,
J

 

[jreckner]

Or how about the common sense 1500 mah 7.4?????

 

[kineteks]

3.3V cut-off

...so to do this we use the Hot-Wire, go to Voltage Cut-off, move the slider all the way to the right and a small window comes up with 3.0 in it... we then use the red up/dwn arrows just to this little window's left to set the number to 3.3, we then move the slider back to the appropriate number of cells... right?

 

[Rockcrawler]

Is anyone running the losi 3c crawler pack with their fx-r??? I would like a small lipo like this but want to make sure it will work ok. I am running either a 55t or 35t.

thanks,
J

Or how about the common sense 1500 mah 7.4?????

I have never ran mine on 2c.

Why would a smaller 3c not work? The only thing you have to make sure is that your pack is big enough for the crawler as far as the amp draw.

...so to do this we use the Hot-Wire, go to Voltage Cut-off, move the slider all the way to the right and a small window comes up with 3.0 in it... we then use the red up/dwn arrows just to this little window's left to set the number to 3.3, we then move the slider back to the appropriate number of cells... right?

I am at work and dont have it with me but I think after you set it to 3.3v, you just update the ESC. If you move the slider back, it may be going back to 3.0v.

 

[kineteks]

That's what I was wondering, but the cut-off for 2S would be 6.6... 3S 9.9 right? I tried setting it at 9.9, which you can do but had trouble setting up the ESCs to my TX so I set the cut-off back to 3.0 and then put the slider on 3... ESCs set to the TX just fine..........


I'll play with it some more tonight.

BTW if anyone is having trouble setting up 2 FXR w/2 CC BEC powering the servo's only, PM me.... I just went through this.

 

[JeepinDoug]

I've had mine on the 3s/9.0v setting for a long time and no battery problems, but it wouldn't hurt to hit the lipo cut-off a little earlier.

Here's how it works with Hot-Wire;
Move your cursor over the slider (for VC) and right-click.
This opens an option box which also describes each position.
Click custom and the voltage selection will come up on the right of the slider, (defaulted at 3.3 volts).
Cursor over the up red arrow and click it until you get a desired voltage setting (total battery voltage, not per cell).
I set mine at 9.600 volts.
Then click "apply settings".

Let me explain why I came up with the 9.600 volts before someone gets all bundled up.
If you set it at 9.600 volts, you plug in your 3s lipo and it runs fine............it's the correct setting.

If you set your limit at 3.3 volts, you're assuming the FX-R is reading the lipo per cell.
In the custom VC setting there is no option for which series lipo you're running.

If your VC is set at 3.3v you're in series trouble when you hit the cut-off.

If you set it at 9.6 volts and it runs fine, why hasn't it hit the cut-off , (assuming it's set for per cell) it should be in cut-off mode if this were the case.

 

[Norris]

Easy to set??? I/m having trouble setting the instant reverse??? Can't figure out what buttons to push... Help!

 

[CreepyCrawl]

Easy to set??? I/m having trouble setting the instant reverse??? Can't figure out what buttons to push... Help!

For instant reverse advance to LED number 5 and cycle through until LED's 1 and 2 are lit...

http://teamtekin.com/manuals/FXManual.pdf

 

[53 willys]

I figured this would be the best thread to post this up in but Jim from Thunder Power gave me a bit of info:

[FONT=&quot]Anyone using lipo batteries must set your esc voltage cut off at 3.3v per cell min. If you use the standard 3.0v that is default in Tekin and most other ESC’s it will cause the batteries to go below the safe threshold and could cause battery damage. The Tekin has a custom set up, however you must use a Hotwire to activate it. It is recommended that the batteries be kept charged 80% or more to get the best performance and not go below the 3.3v per cell threshold. Low battery voltage may also cause glitching and cause loss of control of the vehicle.[/FONT]

I'm having issues with my VC....when ever I set the custom cut off voltage I plug my battery back in and both my FXR's just flash...like they already meet the cut off....

I tried 9.6v and nothing seems to work....
I burned up two lipos in the last week and i'm trying to track down my issue

 

[Randy P]

Which led's are flashing? This is important to know. If you set 9.6v and we flash that low voltage has been met, check your packs.

 

[Tekin Prez]

I figured this would be the best thread to post this up in but Jim from Thunder Power gave me a bit of info:

[FONT=&quot]Anyone using lipo batteries must set your esc voltage cut off at 3.3v per cell min. If you use the standard 3.0v that is default in Tekin and most other ESC’s it will cause the batteries to go below the safe threshold and could cause battery damage. The Tekin has a custom set up, however you must use a Hotwire to activate it. It is recommended that the batteries be kept charged 80% or more to get the best performance and not go below the 3.3v per cell threshold. Low battery voltage may also cause glitching and cause loss of control of the vehicle.[/FONT]

That is not exactly true. We also recomend setting the VC a little higher than 3V per cell when you do not need all the battery for a race. It is always better to use part of the capacity instead of all.

However our VC is very fast and intelligent. Some products may need to measure 6V for a period of time before they react. This can take the battery below 6V under load. We react by reducing throttle as we approach 6V and never really get there. If the voltage is 6V under load we kill the throttle completely. Note when you plug the battery back in to a charger it is typcally 6.5V to 7V when resting. If the battery is below 6V it was driven until the throttle was cutoff a few times and maybe even kicked along.

If anything the crawler motors are not enough load to pull the voltage low enough to react until the battery is really close to dead.

Tekin Prez

 

[barbaricboye]

can I ask a stupid question? or a question that may have already been asked?


with all this 3.3V talk, I've decided to do it. But before I do just had a quick question.

If I use HW to set VC at 3.3V, can I adjust other settings(DB, etc.) in the field(w/o HW, using onboard programming buttons) and the 3.3v VC will stay set?

or will the VC reset to default?

 

[Tekin Prez]

The custom VC set in the hotwire is saved on led 4 on the unit. You can adjust anything on the unit and the VC setting will not change. You can even change the VC setting on the unit to none or 2s or 3s, and when you return to led 4 it will still use the custom setting from the hotwire.

FYI I assume you mean 3.3V per cell so you actually set a custom value of 6.6 for 2s or 9.9 for 3s in the hotwire. The setting is total voltage and not per cell.

Tekin Prez

 

[barbaricboye]

The custom VC set in the hotwire is saved on led 4 on the unit. You can adjust anything on the unit and the VC setting will not change. You can even change the VC setting on the unit to none or 2s or 3s, and when you return to led 4 it will still use the custom setting from the hotwire.

FYI I assume you mean 3.3V per cell so you actually set a custom value of 6.6 for 2s or 9.9 for 3s in the hotwire. The setting is total voltage and not per cell.

Tekin Prez

COOL

Yeah, I meant 3.3v/cell=9.9v for 3S.

great support, thanks

 

[dennisuello]

A question for the group. How do you mount your FX-R? Since it has no heat sink, it gets hotter than my previous ESC and pretty much melts off the sticky tape. I've tried a few different tapes and it won't stay on.

 

[BigB_117]

A question for the group. How do you mount your FX-R? Since it has no heat sink, it gets hotter than my previous ESC and pretty much melts off the sticky tape. I've tried a few different tapes and it won't stay on.

Are you running a BEC? My FXR only get's slightly warm after a long run...