Hey,
I own a Pro-Ject Debut III turntable, and a while ago I heard a strange noise from the motor, hard to describe, a scratching/dragging sound sort of. I tapped the motor a few times, not to hard but it disappeared. Didn't hear it again for some days.
Then suddenly when I switched the tt on it turned the wrong way ! I assumed it was the motor of course. But someone told me I could try replacing the phasing capacitor first. But that didn't help. (put back the original cap)
Today I read somewhere I should try to switch two of the wires on this 4-pole AC motor. It worked !
Now this is great but I can't really figure out exactly why this worked, did a coil get damaged and has a different impedance maybe, therefore turning the motor the wrong way ? (don't know that much about these motors 😉 )
Can anyone perhaps explain what could have happened to the motor ? Cause I worry I might do more damage than good and better just replace the motor.
It's a simple 16V AC motor with 4-poles with a phasing capacitor (metal polyester film 8.2µF) between the two wires I've switched and a ceramic, what I believe is a interference capacitor over the power switch ?
thanks
I own a Pro-Ject Debut III turntable, and a while ago I heard a strange noise from the motor, hard to describe, a scratching/dragging sound sort of. I tapped the motor a few times, not to hard but it disappeared. Didn't hear it again for some days.
Then suddenly when I switched the tt on it turned the wrong way ! I assumed it was the motor of course. But someone told me I could try replacing the phasing capacitor first. But that didn't help. (put back the original cap)
Today I read somewhere I should try to switch two of the wires on this 4-pole AC motor. It worked !
Now this is great but I can't really figure out exactly why this worked, did a coil get damaged and has a different impedance maybe, therefore turning the motor the wrong way ? (don't know that much about these motors 😉 )
Can anyone perhaps explain what could have happened to the motor ? Cause I worry I might do more damage than good and better just replace the motor.
It's a simple 16V AC motor with 4-poles with a phasing capacitor (metal polyester film 8.2µF) between the two wires I've switched and a ceramic, what I believe is a interference capacitor over the power switch ?
thanks
Check both motor windings for an intermittent or open winding. I can't imagine it came from the factory wired the wrong way if it previously always ran in the right direction.
revolver ac motor
occasionally but less frequent over the years the motor would just gyrate and not spin until it had a load on it or forced to spin ...like it was stuck between two poles??
occasionally but less frequent over the years the motor would just gyrate and not spin until it had a load on it or forced to spin ...like it was stuck between two poles??
My microwave oven does the same thing. 95% of the time it spins clockwise, some times it spins the other way. Some motors work both ways, it just depends on which way it is started.
Perhaps I`m fortunate, my microwave oven stays stationary, making it easier to get the food in and out...
Some small synchronous motors will start up in either direction but types with a phase shift cap should always start up in the same way. The only obvious explanation is as already mentioned, some sort of winding fault.
The funny thing is I heat my stuff for 2:22 or 3:33. (I'm ADD & OCD), the mug always ends up where it started, handle still facing me. 🙂
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