need help on Brushless Sensored setup...stalling in (almost) full throttle.

[dextan22]

so i got this used Novak Ballistic 21.5 motor in a trade a couple of months back and thought i'd try it out on my SCX10. i got a bnew MMP (updated firmware etc.) to run it. so what i did was soldered up the motor wires, plugged in the sensor cable, plugged it in the RX, plugged in the batt, calibrated the TX and everything seemed good. i haven't installed it in the rig yet as i wanted to know if it would run and if i got all the connections right before taking off my old motor and ESC from the rig. that's when i found out that when i pull the trigger to about 3/4 to full throttle, the motor would stall after one second or so. it also does the same thing in reverse. i had castle escs before and i've double checked the settings in castle link, tried it in both smart sense and sensored settings, different cutoffs, everything i could think of or read off the forum. the motor still shuts down when i pull it from 3/4 to full throttle. less than that it would run as long i hold the trigger. i have to let go of the trigger and then pull it again to make the motor run again. the lights on the MMP stays in throttle when the motor shuts down. no flashing lights (if full throtttle) so i doubt the problem is in the ESC. one thing i tried though is (in SMART Sense setting) disconnected the sensor cable and then everything seemed to be working fine. the motor continued running at full throttle in forward in reverse. no shutdowns. so i'm thinking either a bad motor or a bad sensor cable (came with the motor), hopefully just the cable.

have any of you guys experienced this before? anything would be appreciated. thanks!

 

[tgh117]

Pull the sensor cable and then try it and that should rule that out.

Also take a meter and check the voltages that are going to the motor.

 

[dextan22]

works without the sensor cable as mentioned. that's my no.1 suspect too as the sensor cable came with the motor and it looks overly used. i have a new one coming in from amain, should be here any day now.

 

[robertjpjr]

I had a similar problem with my ESC. There was a short on the PCB board of my ESC on one lead. May not be your particular issue, but I thought it was worth mentioning regardless.
My ESC would work fine sensorless. Was choppy sensored / Didn't work at all sometimes.

Another thought,
If your problem was just the wire, it shouldn't work at all. It seems like your ESC is sensing a certain RPM and cutting out.

I'm only offering my opinion, be not be of any actual help..

 

[Deadbolt985]

What type of battery are you using


Sent from my iPhone using Tapatalk

 

[dextan22]

@robert if that's the case, that would really suck big time haha! well, we will see when i get my package from amain. x-fingers! i'd rather it be the motor. haha

@deadbolt, i tried it on both Turnigy Nanotech A-Class 4200mah batteries, both good ones.

 

[tgh117]

It could also be the board in the motor as well. Hopefully the cable fixes it, otherwise it will be a till the dice and try the motor, or borrow someone else's.

 

[NoLime]

I had a similar problem with a novak goat 3s. Turned out that when the hall sensor wire was unplugged after setting up the esc, it reverted back to brushed mode. It didn't sense the sensor wire was still plugged in.
Hope that helps.