I bit off-topic. I'm looking to build a circuit that slows the voltage spike sent to an electric motor. Something that would progressively apply power and progressively power down.

It's for a linear turntable. The tone-arm is belt-driven by an electric motor. The issue is, the motor moves so suddenly that it creates an audible 'thump' in the speakers from the quick movement.

Question

I bit off-topic. I'm looking to build a circuit that slows the voltage spike sent to an electric motor. Something that would progressively apply power and progressively power down.

It's for a linear turntable. The tone-arm is belt-driven by an electric motor. The issue is, the motor moves so suddenly that it creates an audible 'thump' in the speakers from the quick movement.

radar · Answer

I am assuming the motor operates on DC?

radar · Answer

Isn't the turntable driven by the same motor?

radar · Answer

I would think you would prefer a fast start for the turntable, true?

anonymous · Answer

This is not for the drive motor, this is for the motor that pulls the tone arm. Yes, DC.

anonymous · Answer

Perhaps a capacitor will do what you want. The motor already has inductance.

radar · Answer

That was the approach that I was thinking about, I would use as a trial a 50 Ufd electroyltic with a working voltage that exceeds the voltage that is applied to the arm motor.  Connect is so it is on the motor side of the switch or relay that applies the voltage to the motor.

radar · Answer

From there decide if it helped or if you need either a larger or smaller cap.