Very Noisy Motor

[ArthurH]

I'm sorry, but for some reason, I received no notification of your last post hence the delay

Taking your suggestions in order:

I had also feared I had damaged the original bearings by over-tightening the roller drive belt, so for each of the subsequent sets of bearings I have fitted, I have only used the minimum tension that doesn't slip.

I can, and will recheck the brush springs - but I remember they take a lot of 'pushing back' in order to get the commutator back between them. Again - this would be both motors....

You say above " I think the most relevant is the 10 sec one. " I'm not sure what to do with that?

I can and will tweak with the running belt alignment, but this is something that has only been introduced since changing the four running belt rollers bearings - quite late in the overall 'saga' - it is quite separate from any issue with the motor.

Thanks again for your continued help

 

[guineafowl21]

You say above " I think the most relevant is the 10 sec one. " I'm not sure what to do with that?

That one seemed to show the noise most prominently. If we can establish what frequency it is, it might point us to the source.

 

[ArthurH]

Is it something I should be able to see on this thread? Like an attachment?

 

[guineafowl21]

Is it something I should be able to see on this thread? Like an attachment?

If you click on the link in post #20, it will take you to the Physics Forums thread where he did the spectral analysis.

 

[ArthurH]

(sound of forehead being slapped) - I hadn't realised it was a link.

I must thank your colleagues for the effort they have also put in trying to help me