Definition of bash for English Language Learners. : to cause or allow (something, such as part of your body) to hit something very hard or forcefully. : to hit (someone or something) very hard or forcefully.
Table saw. The blade of a table saw cutting into wood. A table saw or sawbench is a woodworking tool consisting of a circular saw blade, mounted on an arbor, that is driven by an electric motor (either directly, by belt, or by gears). The blade protrudes through the surface of a table, which provides support for the material, usually wood, being cut.
In short, PWM operates like a switch which constantly cycles on and off, thereby regulating the amount of power the fan or pump motor gains. The PWM system that is used for controlling fans and pumps works with the motor, either getting +12V (full power) or 0V (no power). To have a better understanding how this works, take a look at the chart bellow. So, the motor is being fed impulses of power.