Question about Sewing Machines
Your foot pedal, it's like 98% of the rest of them, has a small swing arm that moves back and forth across a line of several metal buttons imbedded into a circuit board. Those small buttons have little prongs that fit through the circuit board material and connect to a small river of solder, so to speak, that in turn is connected to coils of wire. There are many of these small rivers of solder side by side and all connect to different wire coils. The wire coils all have different degrees of resistance to push the electricity on it's way to the main wire that will lead it back out to the wall outlet. Each time you push or let up on the pedal, that little swing arm goes back and forth across those buttons until you stop the pedal, and where you stop the pedal determines the speed at which the sewing machine runs. However, as the arm is traveling across the buttons it makes a small spark as it leaves one and approached the next one, EVERY SINGLE TIME IT MOVES from one to another, there's a spark. Sometimes if the electric service to your home is running on the high side of the 110V - 120V levels it can leave a small, minute, little tail from the arm and it's possible that the arm could become sort of welded, for want of a better word, to one or the other of the buttons, which would make the machine continue to run even after you've released the pressure on the pedal.. If it's plastic you could attempt to dislodge the arm by gripping the pedal with your hand and manually lift and depress it several times. If that doesn't jolt things loose and stop the running you need to either take it to a small repair shop or just buy a new one.
Posted on Apr 09, 2015
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Posted on Jan 02, 2017
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