• Welcome to RCCrawler Forums.

    It looks like you're enjoying RCCrawler's Forums but haven't created an account yet. Why not take a minute to register for your own free account now? As a member you get free access to all of our forums and posts plus the ability to post your own messages, communicate directly with other members, and much more. Register now!

    Already a member? Login at the top of this page to stop seeing this message.

Cutting a motor commutator & motor tweaks

Hi John I have a question for you. I recently purchased a pair of your sport motors for my truck. they are awesome and put out an impressive amount of power and control for the value"thumbsup". After about 6 runs I"m hearing an odd clicking sound from the rear motor. It is very apparent going foward but not really when I reverse. I took the pulled the brushes and they look pretty beat. There is a large pile of brush material on the trailing edges of the brushes. They look pretty pitted and have chipped looking edges. The comm looks pretty good no gouges or heavy scoring. The end bell has no scratches on it so im pretty sure the hoods didn't get smacked on the rocks causing misalignment. Could you help me figure out my problem please. Here are a couple pics of the brushes

brushes001.jpg


brushes005.jpg
 
Okay so Eddie O got me taken care of and helped me find my problem"thumbsup". What a stand up guy. He helped me with my motor regardless of the fact it was from his direct competition. And no his answer was not to buy his motors:ror:. Thanks once again Eddie for your help when I could not get it from anyone else:roll:.
 
I've seen chipping like that before when I used really high spring rates. Or it was coincidental with whatever the problem actually was. But it was around that time that I went to a medium rate spring for the various 35 turn motors in the Losi, all the while being comm cut compulsive, and haven't had the chipping issue since then.
 
On its own, spring tension won't cause stuff like that, it however can and usually always will amplify another issue......so if you have a badly pitted comm slot........super stiff springs are BAD news.

Later EddieO

EeePee said:
I've seen chipping like that before when I used really high spring rates. Or it was coincidental with whatever the problem actually was. But it was around that time that I went to a medium rate spring for the various 35 turn motors in the Losi, all the while being comm cut compulsive, and haven't had the chipping issue since then.
Click to expand...
 
highlandcrawler said:
Okay so Eddie O got me taken care of and helped me find my problem"thumbsup". What a stand up guy. He helped me with my motor regardless of the fact it was from his direct competition. And no his answer was not to buy his motors:ror:. Thanks once again Eddie for your help when I could not get it from anyone else:roll:.
Click to expand...

Hey Erin

Can you clue me on what the problem was. I would like to know. :)


Evan
 
Decent little lathe once you get it setup and such, remember though, it doesn't come with a motor for that price.

I've got a spare Hudy if yer looking for one:)

Later EddieO
 
I'm not fond of the bearing supported mini lathes. They get sloppy pretty quick, and knowing integy they are probably sloppy from the box. Give me V blocks any day.
 
JohnRobHolmes said:
I'm not fond of the bearing supported mini lathes. They get sloppy pretty quick, and knowing integy they are probably sloppy from the box. Give me V blocks any day.
Click to expand...
Decent thoughts, bearings are great, until you get crap in them.:roll::shock:

I would think new bearings, some shielding and constant maintenance would yield a better cut. But if you slack on any of it, you can get hurt real fast/real quick.:roll:
 
V block with the arm riding on a film of oil is maintenance free, if you don't forget to add the drop of oil. And wipe the V block area clean every time before you add the drop of oil.

Hmmm, how many moving parts in a bearing? Compared to how many moving parts in a V block?
 
I am a vblock guy myself, but there are thousands of the bearing supported units out there and they work fine.........with the amount of use crawler guys use their lathes, bearings should last just fine.

Later EddieO
 
The bearing slop just bugs me, I hate anything that contributes to chatter. I agree that most people won't use their lathe enough to wear out the bearings though, so when it boils down to it it would be just fine.
 
Biggest gripe I have about a bearing type is it will let a shaving to go between the bearing and the motor shaft. That will cause a jump and a gouge in the comm. V-blocks really don't have the room for shavings to get in.
 
I agree.....I would definitely upgrade the integy bearings to a nicer sealed unit that has been cleaned out good and oiled...

Later EddieO

JohnRobHolmes said:
The bearing slop just bugs me, I hate anything that contributes to chatter. I agree that most people won't use their lathe enough to wear out the bearings though, so when it boils down to it it would be just fine.
Click to expand...
 
TEDROCKZ said:
Biggest gripe I have about a bearing type is it will let a shaving to go between the bearing and the motor shaft. That will cause a jump and a gouge in the comm. V-blocks really don't have the room for shavings to get in.
Click to expand...

Ive seen that happen too many times to count in the ol' racing days. V blocks all the way.
 
You must log in or register to reply here.

Similar threads

H
Long live the Ascender
Replies
2
Views
121
HVACTeacher
H
M
Replacement motor advice needed for my XR10
Replies
0
Views
751
Mysterious
M
N
Whats the current bang for the buck "comp" crawler rig?
2
Replies
31
Views
7K
Timmahh
T
S
1/12 WW2 DUKW - Amphibious King Kong CA30 Build
Replies
12
Views
1K
SpareParts
S
Inspector86
Brush and commutator polishing.
Replies
3
Views
1K
usert_l
U
Back
Top