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Problem with motor..
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nbcaznmaster
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Problem with motor.. - 04.24.2007, 07:40 PM

Well, my 9920 aint broken. I discovered that if i push the wires from the motor in, that the motor run smooth. When i let go, it coggs. So does this mean i need a new motor? Fixable?


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BrianG
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04.24.2007, 07:48 PM

You might have a cold solder joint or a cracked circuit board.
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nbcaznmaster
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04.24.2007, 10:24 PM

does it mean i need a new motor?


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BrianG
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04.24.2007, 11:28 PM

OH, when you push in the wires on the motor... I must have missed that part. Well, never mind about the circuit board then.

Since motors are very simple, there are one of three possibilities that I can think of:

1) One of the connectors on the end of the wires might have a cracked solder joint. I would try unsoldering the connectors, cleaning out as much of the old solder on the wire and connector as possible, and then resoldering the connector back on. Better yet, use new connectors if you have them.

2) The inside of one or more connectors is dirty causing a weak or broken connection. You can either try to clean the connectors or replace them. Just don't cut them off the motor wires, unsolder them.

3) As you know, the motor consists of several windings whose ends are brought outside the motor for hookup. The wires on the end actually consist of several seperate wires. If one of those wires is broken, then the coil it is attached to won't work. Since the coil wires are solid wires, they don't like to be repeatedly bent/unbent. With the constant bouncing around, one of the wires might have eventually broken. If this is the case, your motor is most likely shot.
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nbcaznmaster
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04.25.2007, 04:52 PM

HMMMMMMMM this is a problem............
Well, does any1 have a motor for sale that would work on an e-revo? Xl prefered!


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BrianG
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04.25.2007, 05:33 PM

Did you check your connectors first? They may be just dirty, loose, or badly soldered...
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04.25.2007, 05:35 PM

Yeah, try re-soldering them first for clarification; What/where exactly do you need to move/push before it works OK?
   
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nbcaznmaster
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04.25.2007, 07:47 PM

thE MOTOR wire, i pushed the plugs together to discover no change


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BrianG
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04.25.2007, 07:59 PM

Unfortunately, it sounds like there are one or more wires that might have broken. In your setup, do you have the wires supported at all, or are they free to bounce around? A simple bracket of sorts, even a nitro pipe hanger can go a long way to help keep the wires from moving around.
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nbcaznmaster
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04.25.2007, 08:23 PM

nope, it kinda just hangs freee


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BrianG
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04.25.2007, 08:42 PM

Whatever motor you get to replace it, I would find a way to brace the wires somehow so it won't happen again...
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04.26.2007, 01:59 AM

Check if one of the wires in a string is damaged and hitting the can. It may have some kind of contact with the can.
   
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BrianG
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04.26.2007, 10:06 AM

Why would a wire contacting the can cause problems? If two wires were to touch the can, the ESC could be fried. Sure, the can would be floating hot (electrically speaking, not temp) and would have issues if the can gets grounded at some point.
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