An independent speed control circuit may be needed with a double-acting cylinder because ________.

An independent speed control circuit is often necessary for a double-acting cylinder to ensure that equal speeds are maintained during both the extend and retract phases of operation. This is crucial in applications where uniform movement is required to maintain synchronization with other machinery or components.

Ensuring that the extend and retract speeds are equal prevents issues related to mechanical stresses, improper alignment, or operational delays that could occur if one speed were significantly faster than the other. This balanced approach to speed control allows for smoother operation and enhances the overall performance of the pneumatic system. Consequently, the need for consistent speeds in both directions makes the point regarding equal extend and retract speeds a key factor in the design of the circuit.