The problem was: "Even when it is disconnected, the machine still runs on its own",has nothing to do with the foot control, right? So, unless you were mistaken in describing the problem, I am second guessing you with the following: If your Bernina machine is a 930 and up,the problem will generally be in the power supply. Contact www.SewTechnical.com as they repair these circuits.The problem was: "Even when it is disconnected, the machine still runs on its own",has nothing to do with the foot control, right? So, unless you were mistaken in describing the problem, I am second guessing you with the following: If your Bernina machine is a 930 and up,the problem will generally be in the power supply. Contact www.SewTechnical.com as they repair these circuits.
Traditionally, an electric sewing machine is driven by a brush-type AC motor via a foot-operated rheostat.
When the rheostat is disconnected the circuit to the motor is broken and no current should be reaching the motor. Obviously your motor is receiving current and this can only be caused by a wiring fault, probably behind the foot pedal connector...
Answers & Comments
Take for service at authorized dealer.
Take for service at authorized dealer.
The problem was: "Even when it is disconnected, the machine still runs on its own",has nothing to do with the foot control, right? So, unless you were mistaken in describing the problem, I am second guessing you with the following:
If your Bernina machine is a 930 and up,the problem will generally be in the power supply. Contact www.SewTechnical.com as they repair these circuits.
What model?
Motor problems
Traditionally, an electric sewing machine is driven by a brush-type AC motor via a foot-operated rheostat.
When the rheostat is disconnected the circuit to the motor is broken and no current should be reaching the motor. Obviously your motor is receiving current and this can only be caused by a wiring fault, probably behind the foot pedal connector...