What happens when the advancing piston rod reaches its forward end position?

When the advancing piston rod reaches its forward end position, a limit switch is typically activated. In this case, the key event that occurs is the actuation of solenoid coil 1Y2 via limit switch 1S2. Limit switches are designed to detect the position of moving parts and provide feedback for controlling mechanical movements.

When the piston rod reaches its limit, it presses against the switch, which completes a circuit and sends an electrical signal indicative of this position to the control system. This signal can then trigger further actions, such as energizing the solenoid coil to perform tasks like retracting the piston or activating other associated components in the system.

This coordination is essential for ensuring the operation of automated systems remains smooth and avoids mechanical damage due to over-travel or unforeseen conditions. Thus, the activation of solenoid coil 1Y2 via limit switch 1S2 is the correct phenomenon that occurs when the piston rod reaches the end of its stroke.