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-   -   Cogging (https://www.rctech.net/forum/australian-racing/770783-cogging.html)

AUSSIE BOB 11-10-2013 12:30 AM

Cogging
 
I have a LRP sphere. I have tried 4 motors ranging from 21.5 to a 7.5. I have tried 4 sensor wires but it still persists.
What happens is this:- Plug in and turn radio and car on, pull the trigger, nothing except the lights do their usual thing. Lightly push the car and it goes, the motor can be revved through the range, but once it stops, it will not go again until it is pushed.
All solder joints are OK but there has to be something small, what is it please.
Thanks
Bob

Hyper Sean 11-10-2013 12:35 AM

Had the same problem with orion r10 pro. 3 times it went back and in the end I changed brands. Anyhow the problem was the sensor board in the esc.

AUSSIE BOB 11-10-2013 12:55 AM

fix
 
That means it has to be fixed, is Frontline still the repairers for LRP or does anyone else do them?

JAM Racing 11-10-2013 06:39 AM


Originally Posted by AUSSIE BOB (Post 12711198)
I have a LRP sphere. I have tried 4 motors ranging from 21.5 to a 7.5. I have tried 4 sensor wires but it still persists.
What happens is this:- Plug in and turn radio and car on, pull the trigger, nothing except the lights do their usual thing. Lightly push the car and it goes, the motor can be revved through the range, but once it stops, it will not go again until it is pushed.
All solder joints are OK but there has to be something small, what is it please.
Thanks
Bob

its only small but its sounds like its only running two outputs out of three
if you measure a/b b/c c/a in volts on the motor you should spot one of the groups missing
sadly its a back to factory repair
all the best
Andrew

El Nitro 11-10-2013 01:57 PM

Ive recently had the same thing happen to a Hobbywing 120a esc. Faulty esc.

I tried different sensor wires / motors.

Unplug your sensor wire and try it.

Mine works when the sensor wire is unplugged.

No warranty on mine, so it will be used on an old buggy.

nexxus 11-10-2013 05:08 PM

LRP Esc's won't run without the sensor wire, in fact the early spheres take no sensor wire as you running a brushed motor and thats a quick way to fry things!

If you have another car with a sensorless esc, try the motor on that so you can rule the motor out as being faulty.

AUSSIE BOB 11-11-2013 03:02 AM

motor ok
 
Thanks Nexxus, but the motors are all good, in fact only a few minutes on each. The ESC has never been used for brushed motors by joining 2 wires, did that with another LRP and that has no probs. Maybe I will just get another Tekin.

daverobbo5 11-11-2013 12:42 PM

Peter Stubis- best man for the job
 

Originally Posted by AUSSIE BOB (Post 12711213)
That means it has to be fixed, is Frontline still the repairers for LRP or does anyone else do them?

Peter recently fixed a LRP TC SXX V2 that had its polarity revered. got it back working as good as new. still working perfectly now.


http://www.rctech.net/forum/australi...c-repairs.html

http://www.rctech.net/forum/australi...us-sydney.html

http://www.rctech.net/forum/australi...repairers.html

http://www.rctech.net/forum/australi...sc-repair.html

http://www.rctech.net/forum/australi...r-problem.html


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