What will occur when the JOG pushbutton is pressed in the motor control circuit?

When the JOG pushbutton is pressed in a motor control circuit, the expected behavior is that the motor will run until the JOG button is released. This is a function designed for short, controlled movements of the motor, allowing the operator to engage the motor for precise positioning or adjustments.

The JOG operation is typically used in applications where momentary control is necessary, such as during setup or maintenance tasks. When the button is pressed, it momentarily closes a contact in the control circuit, energizing the motor only for as long as the button is held down. This does not activate any permanent control relays that would cause the motor to continue running, thus ensuring that the motor operates only during the press of the button. Upon release, the circuit opens, de-energizing the motor and causing it to stop.

This specific functionality distinguishes the JOG operation from other modes, such as continuous run or alternating direction. Continuous operation requires a different control mechanism, while proper jog functionality relies on a momentary contact to enable precise control of motor movement.