Motor keeps cutting off! :(

[MG200]

Now that's a toasted comm

[MRCCRAWLER1.9]

tried my best to get a shot of the little gap i was talking about.

[MRCCRAWLER1.9]

Originally Posted by MG200

Now that's a toasted comm

oppss

Wait, how hot can i get these motors to run?

ive been running a decent 130-140ish degrees. i should be... okay....???

or.. is that too much

[gm0688]

Originally Posted by MRCCRAWLER1.9

crappy phone pic, but here is the com.



its in bad shape, right?

Maybe you can squeeze a little life out of that com by cleaning it with an pencil eraser.

[gm0688]

Originally Posted by MRCCRAWLER1.9

tried my best to get a shot of the little gap i was talking about.

You might also tweeking the springs a little

[MRCCRAWLER1.9]

Originally Posted by gm0688

Maybe you can squeeze a little life out of that com by cleaning it with an pencil eraser.

even if i get it lathed, it wont have a long life span?

[MRCCRAWLER1.9]

Originally Posted by gm0688

You might also tweeking the springs a little

thats what i did

it now runs without stopping, only issue now really is its life span as mentioned

[Charlie-III]

Originally Posted by MRCCRAWLER1.9

yea, its in scrap shape :(

but! i just looked at the wires to the brushes, and noticed that the spring to push in the brushes were getting blocked, since there is a little gap that ends too far away from the brushes, and allow full use of the brush, so i just pulled the spring back, and make it straight, rather than having a hook at the end. This pushed my brushes into the com, and now it runs just fine! !!!!!

WOOHHOOOO its still running with a really beat up com

time will only tell.

Get new brushes. The reason for the "notch" in the brush hood is to make sure you have enough brush length for good power transfer (power flows mostly through the side of the brush/hood contact area, NOT the brush lead) and NOT cocking the brush.
You have just bypassed a safeguard in the motor.
You can likely get a skim cut on the comm., but you may never get it back to perfect due to the burning that went on. By the time it's perfect, the copper segments may be all gone.
The picture explains your earlier issues though.

[MRCCRAWLER1.9]

Originally Posted by Charlie-III

Get new brushes. The reason for the "notch" in the brush hood is to make sure you have enough brush length for good power transfer (power flows mostly through the side of the brush/hood contact area, NOT the brush lead) and NOT cocking the brush.
You have just bypassed a safeguard in the motor.
You can likely get a skim cut on the comm., but you may never get it back to perfect due to the burning that went on. By the time it's perfect, the copper segments may be all gone.
The picture explains your earlier issues though.

ohh.... Great, thanks. that makes sense why there is the notch.

ouch, hmm, i think i may just use the eraser trick time to time.. worked well for me, so i can keep the motor salvaged, untill it really has no comm