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05-19-2013, 11:42 PM | #1 |
Quarry Creeper Join Date: Dec 2009 Location: Brackenfell, South Africa
Posts: 448
| Brushless cogging issues
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? |
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05-19-2013, 11:48 PM | #2 |
Got Worms? Join Date: Jun 2009 Location: Golden, CO
Posts: 6,116
| re: Brushless cogging issues
Its not normal for a brushless motor to clogging up 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) |
05-19-2013, 11:58 PM | #3 |
Rock Crawler Join Date: Feb 2012 Location: OC
Posts: 616
| re: Brushless cogging issues
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....
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05-20-2013, 08:22 PM | #4 |
Rock Crawler Join Date: May 2013 Location: Somewhere in space
Posts: 931
| Re: Brushless cogging issues
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 |
05-20-2013, 08:43 PM | #5 |
I wanna be Dave Join Date: Sep 2011 Location: Douglassville, PA
Posts: 4,225
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Have the same system. Cogs terribly. Sitting in my parts pile for now until I figure out what to do with it.
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05-20-2013, 10:54 PM | #6 |
Quarry Creeper Join Date: Dec 2009 Location: Brackenfell, South Africa
Posts: 448
| Re: Brushless cogging issues
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. |
05-21-2013, 03:58 AM | #7 |
I wanna be Dave Join Date: Jan 2009 Location: New Port Richey, FL.
Posts: 2,545
| Re: Brushless cogging issues
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.
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05-21-2013, 06:32 AM | #8 |
I wanna be Dave Join Date: Sep 2011 Location: Douglassville, PA
Posts: 4,225
| Re: Brushless cogging issues
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. |
05-21-2013, 06:41 AM | #9 |
Quarry Creeper Join Date: Dec 2009 Location: Brackenfell, South Africa
Posts: 448
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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?
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05-21-2013, 07:12 AM | #10 |
I wanna be Dave Join Date: Jan 2009 Location: New Port Richey, FL.
Posts: 2,545
| Re: Brushless cogging issues
Is that the 32T 1200Kv motor?
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05-21-2013, 07:21 AM | #11 |
Quarry Creeper Join Date: Dec 2009 Location: Brackenfell, South Africa
Posts: 448
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05-21-2013, 07:29 AM | #12 |
I wanna be Dave Join Date: Jan 2009 Location: New Port Richey, FL.
Posts: 2,545
| Re: Brushless cogging issues
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.
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05-29-2013, 01:13 PM | #13 |
Quarry Creeper Join Date: Dec 2009 Location: Brackenfell, South Africa
Posts: 448
| Re: Brushless cogging issues
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... 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... |
05-29-2013, 11:30 PM | #14 |
Pebble Pounder Join Date: Jan 2012 Location: London ON
Posts: 143
| Re: Brushless cogging issues
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 Last edited by td-civ; 05-29-2013 at 11:33 PM. |
05-30-2013, 12:05 AM | #15 |
RCC Addict Join Date: Mar 2009 Location: Interior BC
Posts: 1,786
| Re: Brushless cogging issues
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. |
05-30-2013, 05:01 AM | #16 | |
Pebble Pounder Join Date: Jan 2012 Location: London ON
Posts: 143
| Re: Brushless cogging issues Quote:
i find tq sensor wire last longer and are much stronger Sensor cables | |
05-30-2013, 06:24 AM | #17 |
Newbie Join Date: Jul 2011 Location: Holland
Posts: 7
| Re: Brushless cogging issues
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!!! |
05-30-2013, 06:25 AM | #18 |
Quarry Creeper Join Date: Dec 2009 Location: Brackenfell, South Africa
Posts: 448
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And GRU? Sent from my iPhone using Tapatalk |
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