Brushless cogging issues

[Louisbaby]

Hey electronics gurus, I recently got a Hobbywing Ezrun 35a brushless ESC with the 35turn motor and I installed it into my CC01. I noticed that it cogs badly low down, and I was wondering if that was normal, or if mine had a fault? I got it from a guy in the local forum, but it was very well maintained.

Can anyone suggest something?

 

[losikid]

Its not normal for a brushless motor to clogging up :ror:


Now, cogging on the other hand, yes thats very normal and only way to get rid of it is with a good sensored brushless system (Like a Castle MMP or a Tekin RS, with a sensored motor)

 

[TheAxialNut]

you could try to lower the pionion gear down to reduce the cogg affect....i agree with losi though, nothing cures cogging like a good Tekin RS esc....

 

[axial 4x4 crawler]

Is it sensored or sensorless? because this a lot to do with it. If it has no sensor. then it will cog a little, if it has a sensor and is plugged in then it cures the cogging, but the other reply was right, get a TEKIN or nothing else. But in your case see if it is the gear tooth and pitch and read more reviews about it on youtube also call a few techs on websites, you can get help anywhere, try amainhobbies.com their tech support, see what they have to say, if that doesn't help at all you may have a problem with your esc. Hope this helps, I know my esc's but if I wrong sorry;-)

 

[OSRC]

Have the same system. Cogs terribly. Sitting in my parts pile for now until I figure out what to do with it.

 

[Louisbaby]

Thanks for the replys. Firstly, it's not sensored, and I know that's why it cogs. I know a sensor less system will cog, but I wasn't aware that it would cog this much. Problem with the gearing is in the CC01 chassis, you can choose from 16 or 20 tooth pinion, but maybe I'll make a adjustable motor plate.

And the comments about the Tekin ESC, easy to say I must get one of those, but I can't find it locally for a reasonable price, and if I import it, the shipping kills me...

Thanks again guys.

 

[Johnnysplits]

You don't need a MMP or Tekin esc. There are many other brands out there that work excellent. Don't let anyone make you feel obligated to buying high dollar equipment if you don't want to spend it.

 

[OSRC]

I believe it's the motor more than anything. I used the ESC with a different motor in my Mini Trophy and it doesn't cog nearly as bad. If it came with the programming box, maybe try some different settings to minimize it.

To be clear, this is the motor you are using, correct? I tried it for a while in my CR01 and geared down it wasn't bad, but I lost all wheelspeed...and it didn't have much to begin with.

 

[Louisbaby]

Yip, that's the one. 35 turn I believe. I probably should have done some more homework before buying it from the previous owner. But for now, it's in my CC01 Bronco. It's more of a backup vehicle anyway. Maybe I should try and find a higher turn motor. What do you guys think? Or do I just cut my loses as it stands?

 

[Johnnysplits]

Is that the 32T 1200Kv motor?

 

[Louisbaby]

Is that the 32T 1200Kv motor?

Yes it is, sorry. I ment 35amp ESC, and 32 turn motor...

 

[Johnnysplits]

Ok cool thx!! Was gonna order one just to try but I don't want cogging issues. Now if they made this motor with a sensor, it would probably work great. I have a HW 21.5T 1600Kv sensored on the way to see how it does.

 

[Louisbaby]

Ok, so I found the answer to this mess I made. Just so I don't waste money, or this brushless system, I went for plan B.

I paired the brushless motor up with a HPI GRU, cause after your help, and some Google research, I realised that the lower you gear the motor, the less noticable the cogging effect. But after installing the motor GRU combo into the CC01, I noticed all I created was a very slow and torquey Bronco...:lmao::lmao::lmao:

So here is the maths so far:

Axial 55 turn motor on 7.4 volts = 8000 rpm
Hobbywing 32 turn motor (1200KV) on 7.4 volts = 8880rpm
Hobbywing 32 turn motor (1200KV) on 7.4 volts with HPI GRU (7.4:1) = 1200RPM


So If I had done my homework, and bought a 32 turn Brushless system that was sensored, I would have been happy - But I didn't.... So

I got a Tamiya TBLM-01 12 turn motor from a friend, it cogged a fraction less, but paired with the GRU:

Tamiya TBLM-01 12 turn motor (3160KV) on 7.4 volts = 23 384 rpm and paired to the GRU = 3160 rpm

So although the Tamiya motor is not as fast as the Axial 55 turn motor, It has acceptable wheelspeed, and a massive amount of torque.

And before I forget, I have a 20 tooth pinion on the GRU for slightly more wheelspeed...

 

[td-civ]

the hobbywing ezrun motors all cogg unless you run the 80amp esc i find the 35amp just can cut it at very low speeds and loads

myself i run a hobbywing wp80 esc with a hobbywing 3300kv motor and have no cogging at all

 

[SwampDawg]

i just had this issue on my rig, it ended up being a faulty sensor cable.
damn things arent the best for durability when you either keep taking em in/out for whatever reason or bend em to get around things.

 

[td-civ]

i just had this issue on my rig, it ended up being a faulty sensor cable.
damn things arent the best for durability when you either keep taking em in/out for whatever reason or bend em to get around things.

i find tq sensor wire last longer and are much stronger

Sensor cables

 

[Arjan]

I have in my cc a turnigy 860 kv outrunner on 7.2 volt


Its drive great! And i dont have cogging. And a lot of power!!!

 

[Louisbaby]

And GRU?


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