brxl and expert motor

[MaD222]

ok so have a brxl and an expert motor, im running on a 3s sky lipo 30c, after a 5-6 min run of light crawling it shuts down, like its going into cutoff, but the batt comes off at over 12 volts still...
and the motor at the terminals is smoking hot, like cant touch em .....
so is the motor not good on 3s?
or is there another issue i should be looking at,

other then that i love this setup so much but would sure love to figure out whats going on here.....thanks

[Big Daddy]

Sounds like something is binding or the esc isn't liking 3s. Is the lipo cut off set to 2s, 3s or auto?


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[MaD222]

i have cutoff set at 9.3......it hasnt got close to that yet......as for binding.......everything seems to be free.......all the shocks cycle freely, the driveline is unbound, as far as i can see and feel, im running a castle bec set at 7 volts with a 5995 hitec,
i really think maybe the motor is the problem, the esc is completely cool after the run, but the motor posts are very very hot......maybe it could be a bad solder joint, or bad terminals?

[Meatwad]

How many turns is the motor?
Whats your gearing?

[MaD222]

its 27 turn, and 14/87 gearing

[Meatwad]

Hmm... If the can gets hot too, i'd lean towards binding somewhere. If it's just the terminals, could be the solder joint. Definitely interesting.

[MaD222]

ya its just the terminals.....can stays totally cool.......and i just noticed, there is a spring on the negative terminal that is gone, and now no motor power at all......nice......i think im rebuilding this motor....

[Meatwad]

Ah missing brush spring could cause issues. Holmes has them on his site or your lhs may still have some.

[MaD222]

i hate posting when i have a feeling its gonna be sumtin dumb that i missed........it had fallen off, got hung up in the wiring, so i didnt even see it, till i got frustrated, and was moving the truck this way and that.....with a curse.......lol....and it fell out......sweet

[MaD222]

ok i knew there was going to be more to this.........i cleaned the motor and comm and all that, brushes are fresh.....motor works great on bench on a diff esc

now the brxl wont arm or is in protect? or something, as soon as i plug it in, it flashes red/green......then rapidly flashes green.......no response at all to recalibrate, or anything, just flashes.........argh....wth happened.....

[Erbing]

Originally Posted by MaD222

ok i knew there was going to be more to this.........i cleaned the motor and comm and all that, brushes are fresh.....motor works great on bench on a diff esc

now the brxl wont arm or is in protect? or something, as soon as i plug it in, it flashes red/green......then rapidly flashes green.......no response at all to recalibrate, or anything, just flashes.........argh....wth happened.....

Try plug it in and update the firmware.

[MaD222]

i just did that, im at 1.09.....and i just figured out, i had a 2s battery in, and cutoff is set to 3s........anyone else done this before.......argh......hey learn from my awesomness......

all good got her runnin good again!!

[Big Daddy]

I leave my lipo cut off on auto and just listen when I plug in batteries to make sure it counts the right number of cells. I switch back and forth between 2s and 3s and my "get home" battery is 2s.

Glad you got it figured out. Don't you love the "DOH" moments.