The Siren Board

Guys, ive been having some trouble with my model 2, anyone know the problem? Ive only growled it like 5 times, and now its like this! And NO, it is not wound for DC current! Please help!

https://www.youtube.com/watch?v=8-bBRyzI4OA

Has the motor been rewound at all? Cause it sounds like it was rewound for DC current, when it should be able to run with AC current.

If the motor turns when power from a car battery is applied, it was rewound for DC current.

Sounds to me like something isn't making contact. Perhaps brushes or bad connections? Or the mentioned above current (although it sounds like it was running in that configuration before?)

Chem_Boffin_6589 wrote:If the motor turns when power from a car battery is applied, it was rewound for DC current.

It's a universal motor to begin with, it'll run on both AC and DC. Either the field or armature are bad. That would be my guess.

connerdstines wrote:

Chem_Boffin_6589 wrote:If the motor turns when power from a car battery is applied, it was rewound for DC current.

It's a universal motor to begin with, it'll run on both AC and DC. Either the field or armature are bad. That would be my guess.

I was just in a call with him. He showed me some pictures that he had taken and I noticed the rings that attach to the brush holders weren't completely on. He said that they were loose and coming on. My bet is that since they weren't on correctly the brushes were not able to get any power.
Here is a picture of his siren. I circled the 2 rings that connect to the brush holders. Sorry for the big red blob in the middle.

SoundMaster 391 wrote:

connerdstines wrote:

Chem_Boffin_6589 wrote:If the motor turns when power from a car battery is applied, it was rewound for DC current.

It's a universal motor to begin with, it'll run on both AC and DC. Either the field or armature are bad. That would be my guess.

I was just in a call with him. He showed me some pictures that he had taken and I noticed the rings that attach to the brush holders weren't completely on. He said that they were loose and coming on. My bet is that since they weren't on correctly the brushes were not able to get any power.
Here is a picture of his siren. I circled the 2 rings that connect to the brush holders. Sorry for the big red blob in the middle.

That could definitely be the cause as well.