Voltage fluction issue? - Pfaff1475CD
What you need is a voltage regulator. First you will need to know how many watts your machine needs. It may be written near the model number. Or its watts= voltage X amperage. The regulators are rated by wattage that's why you will need this number. These items can be found at stores that sell parts or electronic goods. If lucky your sewing store has one to protect your machine. The problem could be affecting both the motor and the electronics inside the Pfaff machine. I hope I have explain a simple solution for your problem.