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I have a Modified Motor (Reedy Flash) that I took apart to cut the Comm/install new Brushes, BUT I forgot check which way the endbell came off. Does it matter which way it turns, or is there a way I can make sure I reassemble it correctly?
Sorry for such stupid, noobish type of post.

Put it back on and if your car goes backwards, you've got it 180 deg off.

It wasnt on anything. Plus the ESC Im using has been giving me some trouble with Programming. I know you cant just go back and forth, but with a fresh rebuild does it matter which way it spins, as long as the car is going the directions its supposed to. I ask this because Ive heard of "reverse rotation" motors. If there are "reverse rotation" motors, I would guess that others are "forward rotation", but if its just rebuilt, with new brushes, does it matter which direction it turns?

From what I was told many years ago, I don't believe you should run them backwards (180 off). I don't exactly know why though... Direction of the windings? Was there a marking on one of the magnets to show which end was the positive side? Doug (RC Rainman) should be able to tell you how...

call-911 wrote: Doug (RC Rainman) should be able to tell you how...

But we know he is NOT a good driver Must be an another effect of that Hot Trick influence, that stuff is constantly on his mind. Keith, if any one should know, you will...... is he a People's Court fan?

call-911 wrote:Was there a marking on one of the magnets to show which end was the positive side? Doug (RC Rainman) should be able to tell you how...

I'll open it back up and see if there are any markings (Flashes are Quad Mag Motors). I know on another motor I was doing the other day, I saw that the end of one of the Magnets was painted white, so that may be a clue. I would still be interested to know why they cant run either direction....if they shouldnt be.

just hook a battery up directly to the motor to see which direction it's spinning. looking at the armature shaft, it should be counter clockwise. if it's not, spin the endbell 180 degrees as keith said. there's no reason to have a reverse rotation motor if you don't need one.

Wow, tough crowd in here. I feel so loved.

scr8p wrote:just hook a battery up directly to the motor to see which direction it's spinning. looking at the armature shaft, it should be counter clockwise. if it's not, spin the endbell 180 degrees as keith said. there's no reason to have a reverse rotation motor if you don't need one.

That's all you need to do. These are simple electric motors, don't over-complicate things.

Which end am I looking at?

Sorry.

pinion side of the motor. if you were looking at the motor, with the arm shaft pointing at you, it should turn counter clockwise.

Clod runners have been reversing motors for a very long time. All you're doing is changing the (+ and (-) sides of the motor, you're not harming it. This is assuming, of course, that you have a zero degree timed motor with identical brushes/springs.

Timed motors are more critical because of their advanced timing, reversing one of these will require reversing the timing as well. Tuned motors may have different springs on the (+) and (-) brushes. I don't remember what this accomplishes, but it is something to be aware of.

Halgar wrote:Tuned motors may have different springs on the (+) and (-) brushes. I don't remember what this accomplishes, but it is something to be aware of.

This is mainly because the (+) or red pole always wears faster than the negative one; that's why you often have a softer spring on the pos.

Asso_man! wrote:

Halgar wrote:Tuned motors may have different springs on the (+) and (-) brushes. I don't remember what this accomplishes, but it is something to be aware of.

This is mainly because the (+) or red pole always wears faster than the negative one; that's why you often have a softer spring on the pos.

So on my 540 Mabuchi's I'll need to upgrade that spring?

Halgar wrote:

Asso_man! wrote:

Halgar wrote:Tuned motors may have different springs on the (+) and (-) brushes. I don't remember what this accomplishes, but it is something to be aware of.

This is mainly because the (+) or red pole always wears faster than the negative one; that's why you often have a softer spring on the pos.

So on my 540 Mabuchi's I'll need to upgrade that spring?

Nahh, Just keep running them until they look like this: That was a 370 motor that finished off the brush in mid flight
I've given up flying since, I'm a better driver than flyer, and many of you know how "good" of a driver I am

aconsola wrote:Nahh, Just keep running them until they look like this:

friedheli2.jpg

That was a 370 motor that finished off the brush in mid flight
I've given up flying since, I'm a better driver than flyer, and many of you know how "good" of a driver I am

LOL I've got a couple crispy 540's that I was going to open up and look at just for giggles. By the time my clod is finished with them they're in seriously sad shape. On a positive note, I recently just completely opened up a couple of SG Sapphires and all the internals are in good shape. Considering that the truck gets run in mud and muck the brushes and comm were in excellent shape - no scoring, no abnormal wear, no heat damage. I was quite surprised.

I'll also confess that I did the same thing on the first motor that Monster did and that was not paying attention to the endbell orientation. I put it back together, matching the location to the sticker on the case to be the same as on the second motor. The second motor I marked with a sharpie before tearing it apart. All worked fine when it went back together so I must have done it right.