Motor stuttering/ cutting out

[Armistice]

My motor seems to stutter or cut out, especially when full throttled

I have the Castle SCT sidewinder motor/ ESC combo. Pinion and spur are 48p 10t/ 48p 96t respectively

It seems to have started since running it on the beach back at Christmas. My stuff isn't waterproofed, but did run it over some wet sand and such (enough to spatter, but no submersion). Running a Honcho

Could my problem be with sand inside something? Motor or ESC problem?

Anyone else have a similar problem?

[Charlie-III]

My guess would be the motor has sand inside and/or the sand wore down the brushes.

A decent motor tune-up is in store.

What motor? Some are worth rebuilding, some just get replaced.

[Meatwad]

The sidewinder sct combo includes the 1410 brushless motor.

What batteries are you using?

[Armistice]

Brand new uhh... Speedpak 4500

I should say I noticed it RIGHT when I was driving it in the sand. Was doing fine for about 10mins. Let my little cousin drive it and thought he jsut couldn't control it. When I drove it again, I noticed it was the truck itself. Not sure if the motor can get trashed that quick...

[bbking9]

running a BEC??

[92LILREDYJ]

Might have heated up the sidewinder's bec and u may need an external one. I had to have one in my slash on 3s.

[helhedded]

I would pull the brushes and peak at the commutator. I'm willing to bet that it's really dirty and those brushes are worn down. It doesn't take long for dirt and sand to screw a good running motor.

[Charlie-III]

Originally Posted by helhedded

I would pull the brushes and peek at the commutator. I'm willing to bet that it's really dirty and those brushes are worn down. It doesn't take long for dirt and sand to screw a good running motor.

Post 3 seems to say it's a BL motor....... OP has not confirmed though but a "package system" is likely BL.

I was thinking the same as you though.

[Armistice]

I keep forgetting what BEC stands for

That said, I don't think I have one, lol. Whatever was in the SCT box is what I got

What's BL mean?

[Charlie-III]

Originally Posted by Armistice

I keep forgetting what BEC stands for

That said, I don't think I have one, lol. Whatever was in the SCT box is what I got

What's BL mean?

BEC = Battery Eliminator Circuit...... there is one inside the ESC but most don't put out a lot of amps, nor are they adjustable.

BL = brushless

[Armistice]

Then yes, it is BL

Thinking of breaking open the ESC as it did get a little bit of water on it, but that shouldn't hurt it...

Could it also be a radio problem?

Edit. Looking at the ESC, there are some open places some salt water spray could've gotten in there

I took some vid so will upload that. That may give you a better idea of what I'm talking about

[Armistice]

2 within the first 5 sec and a 3rd at :29

It does do it in forward, but wasn't working, so ran it in reverse as it did it more in reverse

http://www.youtube.com/watch?v=PXuuRYAZK7Q

[Twisted Nuts]

Sounds kinda like radio interference to me..
What kind of TX-RX system you running?
Get a BEC on that thing!

[Armistice]

I've had no radio interference before at my house or the GFs

I was thinking that as well, but it's not the drag brake kicking in, the wheels lock up. I'll get back with my receiver

Futaba R152JE

[Charlie-III]

It looks like it only does it when hard steering, is this true?

1-Check the steering EPA's, you may be binding the servo.
2-You may need an external BEC.
3-It may be worth pulling the motor, disassembling & cleaning. Make sure connections are good (especially the sensor if it has one).
4-With the motor out, make sure there is no binding in the drivetrain. Maybe sand between the pinion & spur, or in knuckles.
5-Salt water is very hard on electronics. Pulling the ESC apart and cleaning with rubbing alcohol & an old toothbrush will help. Get all the little spaces. Let dry & reassemble. If you're going to run the rig in water/salt water, read the stickie on waterproofing.

If you do the above & still have issues (when turning), then an external BEC may be needed. What steering servo?

[Armistice]

What's EPA?

You know how when the waves go out and it leave the water behind until it sinks into the sand, that's what I drove through a few times

I'll tear apart the motor and ESC today

Servo is a Futaba S3004

[Charlie-III]

Originally Posted by Armistice

What's EPA?

You know how when the waves go out and it leave the water behind until it sinks into the sand, that's what I drove through a few times

I'll tear apart the motor and ESC today

Servo is a Futaba S3004

EPA = End Point Adjustment......available for some radios. What it does is allow you to have the radio stop a channel (steering in this case) before hard bits hit and bind, thus causing the servo to draw a lot of amps which can lead to the ESC internal BEC getting overworked and dumping the electronics.

[Armistice]

I may add I'm using crystals and radio from my Team Associated T2, lol! It's about 12yrs old

[Charlie-III]

Originally Posted by Armistice

I may add I'm using crystals and radio from my Team Associated T2, lol! It's about 12yrs old

Ahhhh....a "new" radio.....I have Futaba FM's from the early '80's (that I still use).

I'm not sure if your radio has EPA adjustments.....see if you can find a manual online if you don't have your paper one.

[Armistice]

I have throttle and steering trim/ throttle and steering reverse. That's about it