Motor Identification and Use. Help Please

Jim Kennedy · May 13, 2019

I think as a young teenager I saw a motor like this on an oil burner for the hot zinc tank at a galvanizing factory. Looking at it's terminal block, and the two internal switches, I am curious what this motor is for. Any help would be appreciated.

Jim

sfriedberg · May 13, 2019

Jim Kennedy said:
I am curious what this motor is for.

Probably a "modulating actuator" intended to control a large valve or damper. Basically a primitive servo, using a "bang-bang" (hot/cold) control loop. In fact, so primitive that "modulating" is probably incorrect.

Jraef · May 14, 2019

That is a Motorized Potentiometer or MOP. Think of a large dimmer (the old kind) but instead of a knob to move the wiper and change the resistance, there is a tiny little gear motor that does it. So to change it one way or the other, you close external contacts to operate the motor in Fwd or Rev, then there are limit switches at either end of travel to keep it from going too far.

Now this is done electronically because that is much easier and less expensive, but when implanted electronically it is still called a MOP function. You have the real deal.

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Motor Identification and Use. Help Please

Jim Kennedy

Aluminum

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sfriedberg

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Jraef

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