The PWM speed controller is the absolute best way to go.
But, to your original question: yes, you can use a dimmer switch on it, in line with the power cord.
With the dimmer, you will lose torque as you lower the voltage (and thus the speed) but if your cauldron creep doesn't need all of the torque the wiper motor is capable of, then this might be an option if the PWM controller doesn't get there in time.
But, to your original question: yes, you can use a dimmer switch on it, in line with the power cord.
With the dimmer, you will lose torque as you lower the voltage (and thus the speed) but if your cauldron creep doesn't need all of the torque the wiper motor is capable of, then this might be an option if the PWM controller doesn't get there in time.
