70s optic fibre light trouble


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Old 04-28-22, 10:21 PM
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70s optic fibre light trouble

Hi everyone, I have this really cool fibre optic lamp


Where would the cog go? I have a 70's fibre optic lamp with silver ball base. It was making a slight whirring noise, so I opened the base and discovered a thin cog sitting loose. Could this cause the whirring sound? I have no idea where it goes. Are these lamps renowned for having a whirring sound?

Thank you. Tracey
 

Last edited by PJmax; 04-29-22 at 11:02 AM. Reason: labeled pic
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Old 04-28-22, 11:51 PM
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Welcome to the forums.

The red arrow is pointing to a color/pattern changing wheel.
The blue arrow is pointing to the shaft of the wheel.
There needs to be a motor inside there that drives the shaft and spins the wheel.

I see a transformer under the light plate. I'm guessing the motor is on the other side of it.
Post a picture of the motor. That's what is humming.

 
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Old 04-29-22, 04:07 AM
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Thankyou

Thankyou. So can motor's be replaced? Do they usually hum? I'm not sure where the cog goes?
 
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Old 04-29-22, 04:49 AM
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Do they usually hum?
At the bottom of the fixture, it appears to be a transformer. (The metal box thing) If it is a transformer it is normal for them to hum.

If it is not a transformer perhaps the motor is stalled and that is what is humming?

 
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Old 04-29-22, 08:30 AM
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"Where would the cog go?"
What are you calling a "cog"? Is it shown in your picture?

Yes, motors can be replaced but yours is probably still good. Often the bushings just need oiling. It also wouldn't hurt to lubricate the gearbox if it is not sealed.
 
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Old 04-29-22, 11:03 AM
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I added text and arrow for what looks like the motor behind the transformer.
Those motors and gear driven spinning wheels are very noisy.
 
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Old 05-02-22, 05:11 AM
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Cog?


Where does this thin cog type ring go? Thankyou for advice that it's normal for the motor to have a sound...
 
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Old 05-02-22, 07:13 AM
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The sprocket/cog goes between the motor and color wheel. It's part of the speed reduction gearing.
 
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Old 05-02-22, 02:01 PM
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I agree but I don't see where it goes in any of your pictures.
I don't see any additional picture showing the motor.
 
 

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