Question

What is the purpose of using a cam-operated 3/2 valve in 2-speed circuits?

1) To control the flow of exhaust from the cylinder
2) To control the speed of the cylinder during approach
3) To activate the cam valve just before contacting the work
4) To restrict the flow of air in the cylinder

Answer 1

The cam-operated 3/2 valve in 2-speed circuits controls the speed of the cylinder during approach, allowing for high-speed movement that switches to a lower speed before contacting the workpiece.

Step-by-step explanation:

The purpose of using a cam-operated 3/2 valve in 2-speed circuits is to control the speed of the cylinder during approach. When the cam actuates the valve, it typically allows for a high-speed movement of a pneumatic cylinder until it reaches the cam. Then, once the cam triggers the valve, the system switches to a lower speed before contacting the workpiece. This provides a controlled approach that can prevent damage and improve precision when the cylinder is performing tasks such as assembly or machining operations.