I purchased a Castle Mamba Monster X and Tekin ROC412 3100kV for my Axial Bomber kit. With any kind of speed it's an awesome setup. But when trying to crawl I'm getting bad cogging. See the two videos below.

The MMX cogs on both the Tekin ROC412 installed in the Bomber as well as a Yeah Racing 21.5T motor that I bench tested. I tried replacing the sensor cable and LiPo battery. I also unplugged the servo to ensure nothing else was drawing power. After speaking with Castle they concluded that something was wrong with the ESC so they sent me a replacement.

The replacement MMX has the same cogging on the same two motors. I even tried a new transmitter and receiver, but nothing stops the low speed cogging.

Castle stated I should not have any cogging with the default settings and that I shouldn't have to "tune" out the cogging with software settings

I've had nothing, but dislike for Castle in the past, but I decided to give them a second chance. Before I give up on Castle and write them off for good, does anybody have suggestions on how to fix this cogging?

+ YouTube Video

+ YouTube Video

What ratio ongears? Drop a fdw teeth on the pinion.

It's the stock gearing - 64/12

Hum... are you using the sensored cable with the MMX? Or is it off? (you need a separeted "gizmo" for sensored use um X's)

Castle before didn't have sensored capability on the Mamba Monsters ESC's...only on the little one Mamba Max Pro.

Also i strong believe that the Mamba Monster X or 2 or 1 are ESC's for more then 3s.... using them on 2s seens useless.

For 2s use a competetion ESC like Hobbywing or Trackstar or even SkyRC....120A ones sensored.

You will like the "turbo" and "smoothness" that come out of them!

There is nothing wrong with your ESC, it's just not made for sensored or 2s use.

Try to put some timing on the ESC (little) and trim forward on radio throttle to!

My bet is the timing software on the Castle does not meet the motor's criteria... and of course 2s if you are using that lipos on a Mamba Monster! Check what manufacter's website state about that speficic motor timing....

Come on, man. At least have some idea of what you're talking about before you spew that garbage. The MMX is rated for 2S to 6S. Saying 2S is not enough is just a lie. Saying it's not meant for sensored motors is another lie.

I've tried it on 2S and 3S with the same results. And yes, I'm using Castle's sensor harness as well as a sensor wire.

Calibrate ESC. anytime you change ESC or motor, you must calibrate your ESC.

I've done that as well. Reset both ESCs to default. Updated firmware to the latest (1.77) and recalibrated when doing this as well as when switching motors.

The guy is just trying to give you some info./input and all you do is call him a lier??? Good luck with getting a good answer!!!

Yes, I want and appreciate good help. I don't want to be misinformed by somebody spreading false information. If I was a newbie I might have believed him. Nobody needs that on a forum.

Ok, you tried 3s on it... fine! No need to be so friendly... after all i was trying to help! And said nothing wrong... Nothing man.

I didn't said they would not work on 2s... i said that 2s for that monster's could be the reason for the strong cogging. They were know for 6s abuse sensorless SAFEty! They are not ESC's for racing sensored, period! The Mamba Max Pro barelly is....but that's a weak esc for a 1/8 rc.

I just refering that the older generations of Monster's had no sensored THING.

This is news for Castle...they could be BETA on the sensored world

And by Monster i mean those ESC's are not suited for 2s! They are perfect for 4s/5s or 6s sensorless madness.

I got less luck then you...as this was advertised as a 6S esc...yah right!!

+ YouTube Video

Have you checked the timing? Also check your's TRIM on radio for trotthle and check the curve,punch control..that stuff you seen to know as well.

Raise timing a little and make sure to use PUNCH CONTROL on low. IT could be easy the punch control set TO HIGH, and it cog's...needs a little push! But a sensored system shouldn't do that in my opinion....

If not...get the ESC's i described and you problems go away on 2s.

Also try those motors on a sensored ESC if got anyone with a spare one, but not from Castle! Or even you on some other rc...

Sorry for getting so snippy, but this issue has me frustrated to no end and you were telling me things about the MMX that just aren't true. 2S is fine. Castle knows I'm running 2S.

I've tried changing startup power and timing. Nothing changes the cogging.

I have another sensored ESC, but I'll have to change the connectors and I haven't gotten there yet.

Castle sent me a new sensor harness, but it's not supposed to be here Friday. I'm more than annoyed that, despite all of the BS I've been through with their products, they do not send things to me in a more expedited fashion. They don't seem to be in a hurry to get this fixed like I am.

Ok, for 2s then... they will work on 2s that's for sure... but i tought those are not "enough" for a Monster
Ok enough of that...

Have you tought the other way around... your motors could be the origin...

Make sure they do not cog on another system..i mean another brand ESC.

2S works by default. Ck Cutoff Voltage if using 3S or above.

3S cogs as much as 2S.

I tried a different motor and it cogged with the MMX.

I still haven't had a chance to try a new ESC with my Tekin ROC412.

If somebody told me this I'd think they were trolling, but here's the truth.

The MMX still cogs with the brand new sensor harness.

I took the MMX out and installed my 35A X-Car ESC from HobbyKing using the same motor leads, sensor wire and receiver. Guess what. IT'S AS SMOOTH AS BUTTER!!! What in the hell is going on? I feel like I'm in the twilight zone.

Videos for proof.
I have more control in reverse because the ESC and motor aren't on the same rotation. I'd have to reverse the motor in the settings, but I didn't do that. I just wanted to shoot the videos and get them to Castle.

https://www.youtube.com/watch?v=PbOVsqK0uPA

https://www.youtube.com/watch?v=PIcax97x0ag