Motor cogging under load
 

Hi,

I have just finished getting my TLR 22 3.0 ready to run but I did have an issue at the weekend. I'd overlooked checking the length of the sensor cables I had when fitting the electrics and came up short.

In order to get going straight away I decided to set the ESC to run sensorless until I could get a longer cable on order. Everything seemed OK until it came to setting up my slipper. As soon as I had the wheels held and gave the throttle a good pull the motor started cogging and shuddering and the front wheels wouldn't lift.

I'm assuming it's simply down to the lack of sensor cable but is there anything else people advise looking at in case this doesn't sort things out?

Many thanks in advance
McT

Hi,


I'd try a sensor lead first.


A sensor makes the motor smooth, the speedo knows where the magnet is and can work accordingly.


In sensor-less the speedo has to make a best guess, which make it very un-smooth to cogging.


MiCk B. :-)

Hi Mick,

Thanks for the advice. I have just received the sensor cables I ordered and fitted one to the car. I'll try setting the slipper again with the sensor connected and hopefully it won't be a problem this time...

McT

Without a sensor cable the ESC cannot detect the rotor position of a stalled or very low motor rpm so it will only apply a very limit current to it until it starts to spin up.

Thanks for the info everyone.

All sorted now, sensor cable fitted and everything is working great. :thumbsup: