MMM Combo 2200 a lot of cogging...

[Topas]

Today I received my MMM Combo 2200 and put it in my Losi 8ight-e (4s) (16th pinion)I have a lot of cogging instead of a smooth start ....

I am also using a MMM V3 and a NEU 1515/1/Y in my Emaxx on 5s and it is very smooth.
Are there different MMM V3s available ? The older one beeps 5s times on startup indicating that I am using a 5s lipo setup. The new one in the combo doesn´t...

[sleebus.jones]

If it doesn't beep 5 times, then the auto-lipo setting is probably not set correctly. It might be cogging because the LVC is kicking in. Take a look at it with the castle link and see.

[Topas]

Ok, I turned on auto-lipo ... this was my fault but the cogging still remains... It might be a problem with the very strong magnets inside the motor.

[RBMike]

It should not be cogging, there is a problem somewhere. Make sure all you connection are good with good solder joints on the bullets.

[Arct1k]

There has been one other report of a bad solder joint - worth checking

[MetalMan]

Originally Posted by Arct1k

There has been one other report of a bad solder joint - worth checking

I've seen bad solder joints from CC on more than one occasion... Fortunately they weren't on any of my CC items, but a buddy of mine has had a MM 5700 and MMM 2200 combo each with a single bad solder joint that produced extraneous cogging.

[sleebus.jones]

Originally Posted by Topas

It might be a problem with the very strong magnets inside the motor.

Realistically, that's not really a reason for cogging. It's more likely you have a bad connection somewhere.

[Topas]

Solder joints are fine ....

[Hardstyle]

You have newest firmware in it? What lipos are you running, C rate?

[Topas]

I am using Kokam H5 30 C 5000mAh lipos .
Yes I have the newest firmware 1.2

[Hardstyle]

Very hard to say then, Lipos sounds ok. Have you tried different setting for the controller? I would try reset all the setting to default and try then. But that just me, prolly wouldn't help anything.

Here's few thing that could cause cogging: bad solder joint, bad lipos, gearing, binding in drivetrain, (too long wires?), escs settings

[BrianG]

If this is truly cogging, I would think it was a connection or soldering issue. Since you say they are ok, we'll assume they are. And gearing sounds ok, although 5s on a 2200 kv motor geared with a 16T pinion is gonna be fast.

Might seem to be a PITA, but you could take the MMM from your maxx and try it in the 8ight-e. If it still coggs, put the 8eight-e MMM back in and try the Neu 1515/1y from the maxx. Just trying to isolate the problem component.

Sometimes, a glitchy radio can seem like cogging. Try plugging a servo in the throttle port and see how it acts. Obviously, it should turn smoothly. Even if it does, ESCs tend to be more sensitive than servos. And/or try the radio setup from your maxx.

[brushlessboy16]

Try increasing start power on the MMM

[emaxxnitro]

Originally Posted by BrianG

If this is truly cogging, I would think it was a connection or soldering issue. Since you say they are ok, we'll assume they are. And gearing sounds ok, although 5s on a 2200 kv motor geared with a 16T pinion is gonna be fast.

Might seem to be a PITA, but you could take the MMM from your maxx and try it in the 8ight-e. If it still coggs, put the 8eight-e MMM back in and try the Neu 1515/1y from the maxx. Just trying to isolate the problem component.

Sometimes, a glitchy radio can seem like cogging. Try plugging a servo in the throttle port and see how it acts. Obviously, it should turn smoothly. Even if it does, ESCs tend to be more sensitive than servos. And/or try the radio setup from your maxx.

+1 this is a tell tail way to find out. it could be a bad solder joint inside the motor? where the wires meet the windings.

[sleebus.jones]

Holy out of focus picture batman. I think I can see something there but I'm not sure.