Kraton Servo problems

[panth00]

Hey all!

I recently had to put a new ESC and receiver into my Kraton 6s(different thread). After that all was well.

About 2 weeks later, my servo started keeping the wheels all the way to the left. You can manually move the wheels left and right easily until the receiver is turned on. Then it jacks them all the way to the left.

I decided to go ahead and buy a Savoy servo, metal mount,and kraton EXB V2 servo saver. it’s still doing the exact same thing. I’ve tried doing a transmitter reset thinking maybe it was some weird setting in the transmitter but no luck.

Any ideas guys?

https://imgur.com/a/DVJeb8n

 

[RCbuzz]

You can try to re-bind/calibrate the receiver and remote. What receiver are you running? If you have ruled out the servo my bet is something with the receiver/remote.

Got a spare you can test?

 

[panth00]

You can try to re-bind/calibrate the receiver and remote. What receiver are you running? If you have ruled out the servo my bet is something with the receiver/remote.

Got a spare you can test?

I do actually give it a go exactly the same controller. Slt3


Edit…. same problem with a different remote this makes no sense lol. Another bad esc? I just replaced it two or three weeks ago and I’m very easy on my vehicles

 

[RCbuzz]

Sounds like a bad receiver.

I would also check servo center. With no servo horn attached, does it center and turn left right? Or just go full tilt one way and not move at all?

 

[Chapinb]

Did the original servo horn strip and you placed the new horn in the same position?

 

[panth00]

Sounds like a bad receiver.

I would also check servo center. With no servo horn attached, does it center and turn left right? Or just go full tilt one way and not move at all?

I’ll check that. Replace the receiver at the same time as the ESC a few weeks ago that’s why this is also confusing.

Did the original servo horn strip and you placed the new horn in the same position?

That’s possible I suppose I’ll check all these ideas. Thank you guys so much.

 

[Eno]

@panth00 Turn your servo 180 degress, it's mounted wrongly.

Did you calibrate the ESC/Tx?

Is the Tx steering trim centered?

 

[panth00]

@panth00 Turn your servo 180 degress, it's mounted wrongly.

How was it doing it with the old servo right before the new one? So odd.

Edit.. I’m pretty sure that’s correct orientation for a v5 kraton isn’t it?

 

[RCbuzz]

@panth00 Turn your servo 180 degress, it's mounted wrongly.

Did you calibrate the ESC/Tx?

Is the Tx steering trim centered?

Good eyes, that does appear to be backwards.

I would also center the servo with no horn, then place the servo horn on when you know it's pretty much center.

Stock photos with shell removed:
https://www.amainhobbies.com/arrma-...ss-monster-truck-blue-v5-ara8608v5t2/p1274552

 

[panth00]

Ok sirs!

I will do all the things and report back! Getting over Covid, and still pretty wonky. I’m not surprised that I possibly did something weird in this state lol

 

[Garcbomber]

Ahh yes, needed a good chuckle. Proper orientation of the servo helps, do not install horn until rx unit is powered up and tx trim is zero with wheels pointing straight!

Good News, looks like you have a spare servo!

 

[panth00]

Ahh yes, needed a good chuckle. Proper orientation of the servo helps, do not install horn until rx unit is powered up and tx trim is zero with wheels pointing straight!

Good News, looks like you have a spare servo!

I’ve definitely done stranger, unfortunately lol.

I’m still trying to figure out how it was doing it on the old servo right before I replaced it.

 

[panth00]

Good eyes, that does appear to be backwards.

I would also center the servo with no horn, then place the servo horn on when you know it's pretty much center.

Stock photos with shell removed:
https://www.amainhobbies.com/arrma-...ss-monster-truck-blue-v5-ara8608v5t2/p1274552

I think I’m being dense, but that looks exactly exactly how I had it installed?

 

[aundro]

I think I’m being dense, but that looks exactly exactly how I had it installed?

Not quite.
On the stock photos, the teeth are close to the center of the chassis, with the horn pointing outwards.

In your case, the teeth themselves are close to the outside of the chassis, with the horn pointing outwards as well (it might even bump into the body if you put it back on.)

 

[332_RC]

I think I’m being dense, but that looks exactly exactly how I had it installed?

I do believe it's in backwards. The horn goes across the top of the servo hat, with the splines over near the tower brace. Then the servo link is straight in line with the chassis.

 

[panth00]

I do believe it's in backwards. The horn goes across the top of the servo hat, with the splines over near the tower brace. Then the servo link is straight in line with the chassis.

OK, I think I see where I’m getting confused. When I’ve flipped it around the correct way there isn’t enough travel. You literally can’t hook the servo and the servo saver back up together. I not sure why my brain isn’t processing this lol. I appreciate the patience.

 

[332_RC]

OK, I think I see where I’m getting confused. When I’ve flipped it around the correct way there isn’t enough travel. You literally can’t hook the servo and the servo saver back up together. I not sure why my brain isn’t processing this lol. I appreciate the patience.

View attachment 387985

Unhook the horn. Turn steering trim to center, or neutral, or zero, whatever you call it, then power up transmitter, then ESC. The servo will center itself, making a quick noise. Then attach the aluminum horn straight in line on top of the servo. It might be one spline tooth forward or back, find the closest one. Then attach the link to the saver arm.
Then run & adjust trim for the steering to straight.

 

[Eno]

When I’ve flipped it around the correct way there isn’t enough travel.

Here's mine:

 

[Chapinb]

Unhook the horn. Turn steering trim to center, or neutral, or zero, whatever you call it, then power up transmitter, then ESC. The servo will center itself, making a quick noise. Then attach the aluminum horn straight in line on top of the servo. It might be one spline tooth forward or back, find the closest one. Then attach the link to the saver arm.
Then run & adjust trim for the steering to straight.

This. Your horn just isnt centered correctly on the servo.

 

[KratonBuilder]

The V5 configuration has the servo horn mounted inboard relative to the car, as @Eno stated.

The servo horn must be either super low profile or an extended neck(shown below) as the first linkage in the system sits between the horn and the top of the servo. It's preferable that you have a horn which allows that linkage to sit as parallel to the chassis as possible when centered.

Buy the correct horn and remove the current.
Power the truck on and center the steering trim.
Straighten out the wheels and hold them in place.
Make sure the fronts are centered and remount the servo horn to the servo.
The servo horn should sit about 90 degrees relative to the chassis with the wheels centered.