When changing dies on the press brake, what mode must the machine be set on?

The machine must be set to the jog mode when changing dies on the press brake. Jog mode allows the operator to move the press brake in small increments, giving precise control over the positioning of the upper and lower dies. This careful control is crucial during die changes to ensure safety and accuracy.

In jog mode, the operator can easily position the die for removal or installation without engaging the machine's full operational force, which could lead to safety hazards or damage. This mode helps facilitate a safe working environment by reducing the risk of accidental activation of the press brake while the operator is in close proximity to the machine's components.

Other modes, such as auto and standby, do not provide the same level of precision and control that jog mode does. In emergency mode, the machine is designed to halt operations abruptly, which is not suitable for the delicate task of changing dies. This highlights the importance of using the appropriate mode to ensure both safety and accuracy during die changes.