Cutting a motor commutator & motor tweaks

[Hulksta]

Thanks for taking the time to pass in some info guys, yous are very helpful"thumbsup"This thread should be a sticky, there is alot on great info in here8)

Ive been giving google a workout:lmao:with very limited results, ive found some very old adds and one new one for a new trix trax at $1200 :shock:
So what other wording should i try other that "magnet zapper"? do they have another name?

 

[EddieO]

rctech.net
hobbytalk.com
rcuniverse.com
rcgroups.com

bcra, which is the British racing league has forums, they bought a few of them.....just gotta watch out for them....

Biggest problem is the shipping to you is gonna be KILLER....like getting kicked in the nuts from behind.

Later EddieO

 

[Hulksta]

Thanks EddieO"thumbsup"

I know all about postage, i picked up a TurboDyno45 and 75a Iota PSU a little while ago and post was just shy of $200... after running some figures i reckon $300 for a zapper, if i knew someone in OZ that did them chances are i would just send them there.. sometimes i wish i lived in the states, you guys have all the cool stuff:mrgreen:

 

[marvinbeaverdip]

got a lathe!

love this thread! I just bought a lathe, and I'm thinking I might need to pick up some old motors just to have something to turn.

 

[highlandcrawler]

Okay, Ive got to ask what I'm sure a lot of you are going to laugh at me for but I'm prepared for a flaming:lmao:. Why cant I turn a comm on my regular lathe? I'm sure there is some obvious reason I'm overlooking but what makes a rc lathe "special"?

 

[Hulksta]

You proberly could if you took the time to set it up right, but i can see alot binned from bad cuts before it was setup right... your lathe would need to run true and you would need to use a steady for the comm end...

I dare say that most would use a comm lathe because its cheaper/easier option... ive got a lathe, but ive also got a comm lathe because my lathe has a fraction of runout, and its easier to toss it in the comm lathe"thumbsup"

 

[Charlie-III]

You probably could if you took the time to set it up right, but I can see alot binned from bad cuts before it was setup right... your lathe would need to run true and you would need to use a steady for the comm end...

I dare say that most would use a comm lathe because its cheaper/easier option... I've got a lathe, but I've also got a comm lathe because my lathe has a fraction of runout, and its easier to toss it in the comm lathe"thumbsup"

+1, This is why in a nutshell.

Biggest reasons are:
portable
both shaft ends supported
Dedicated machine

I've cut comms on a small lathe before, but made an end support from aluminum rod with a bearing that held the motor shaft.
Also bought a small radiused carbide bit to do the cutting.

Motor comm lathe is usually the better option though."thumbsup"

 

[EddieO]

There is no reason you can't, assuming you know what you are doing....

Big Jim cut comms on his Unimat Lathe. I even bought the newer version of the unimat when I started brood to cut comms. It was not fun to setup, so we just used pit lathes as they are pretty straight forward....

Reedy motors also used a big air controlled lathe to cut all their production motors.....I saw a pic of it once, was very cool....

So if you know how to set it up to cut it right, by all means go ahead, no reason you can't do it.

Later EddieO

 

[SlickRockSpider]

Okay, Ive got to ask what I'm sure a lot of you are going to laugh at me for but I'm prepared for a flaming:lmao:. Why cant I turn a comm on my regular lathe? I'm sure there is some obvious reason I'm overlooking but what makes a rc lathe "special"?

Erin
Hell yes you can turn a comm on a lathe. I use collets for easy set up and accuracy. If you don't have collets you can use a three jaw chuck if its in good shape. If you have doubts use a 4 jaw and dial it in. . Its so short hard to f**k up. "thumbsup"

I know you have heard it before but Erin if you need some comms turned send them to me. I will turn them for free.

Charlie-III "Motor comm lathe is usually the better option though."

If you can afford a good lathe buy it. Because well think of all the neat stuff you could make with a lathe.


Evan

 

[JohnRobHolmes]

I use a lathe with collets all the time for mine as well. I get much better cuts than the little comm lathes this way, and can use off the shelf bits without modifying them. Just gotta make sure the arm has good concentricity first, some aren't so precise from stator to shaft.

 

[rock hard]

I had a guy tell me today that him and others he knows used
compressed air to cool down their electronics.

Appearently if you hold the canister upside down,it gets super cold.
If your electronics are hot,would this have any negative affects on internal components,or should it be fine.

My understanding is its beiong used to cool motors and servo's mostlly
Gonna assume its being used on esc's aswell

 

[JohnRobHolmes]

Sounds like a good way to crack some parts to me. Maybe if it wasn't a pinpoint of cold gas, but a larger flow.

 

[EddieO]

While it works on motors.....bad idea on electronics, especially a servo....

Gets expensive too......an ice cube or a peltier based cooler is MUCH cheaper. The only reason though to really cool though was to prevent fade and such.....not much of an issue in crawlers.

Later EddieO

 

[whoodie]

I'd be worried about condensation, ESCs don't like water. What is getting so hot in a crawler that you're worried about cooling it?

 

[ax-10 crazy]

Is this a 4 mag can? On the description it says it is only two mag.

 

[Hulksta]

I count 4"thumbsup"

 

[Robbob]

I had a guy tell me today that him and others he knows used
compressed air to cool down their electronics.

Appearently if you hold the canister upside down,it gets super cold.
If your electronics are hot,would this have any negative affects on internal components,or should it be fine.

My understanding is its beiong used to cool motors and servo's mostlly
Gonna assume its being used on esc's aswell

Oval and TC we use to get the dust off cans from Radio Shack, hold them upside down and spray the cans.

Went to a Roar regional offroad race one year in N.J. .... it was 90*+ outside and 110*+ inside where we were racing. We did the same thing to the motors then, with the shammy wraps on them, and even sprayed the nimh packs. It helped with run time in the heat but you could feel the battery slowness upfront.

Never touched electronics.

 

[killswitch]

Oval and TC we use to get the dust off cans from Radio Shack, hold them upside down and spray the cans.

Went to a Roar regional offroad race one year in N.J. .... it was 90*+ outside and 110*+ inside where we were racing. We did the same thing to the motors then, with the shammy wraps on them, and even sprayed the nimh packs. It helped with run time in the heat but you could feel the battery slowness upfront.

Never touched electronics.

I'm guilty of it. It was a must do when we were running outside during the worst part of summer.

 

[EddieO]

Thats a 4 mag can......its still only two poles, but each pole has been split into 2 magnets.

The motor looks to be a Reedy PT....

Later EddieO

 

[ax-10 crazy]

Thats a 4 mag can......its still only two poles, but each pole has been split into 2 magnets.

The motor looks to be a Reedy PT....

Later EddieO

Ok, it is actually one of the ckrc motors that I believe you make? In the description it said in was a two mag so I was just wondering.

Thanks"thumbsup"