What should be applied before jog controls can take effect?

To ensure that jog controls function correctly, SERVO power must be applied first. SERVO power refers to a specific type of control circuit that enables precise movement and adjustment of machinery and equipment. When jog controls, which allow for small or momentary motions of machinery, are engaged without SERVO power, the system may not respond as required, or it might not engage at all.

This prerequisite is integral because the SERVO system typically regulates the positioning and speed of the equipment, which is crucial when performing operations that require fine control. Without SERVO power, even if the jog control is activated, the mechanism may not properly respond, preventing effective and safe operation.

Other options, such as full power or calibration, are not necessary steps before engaging jog controls in this context. Full power refers to the overall operational power and is not specific to the precise movements allowed by jog controls. Calibration is essential for ensuring that a system operates within its specified parameters, but it does not directly influence the activation of jog controls. An emergency stop is used to halt operations and protect against unsafe conditions, rather than being a required state to activate jog controls. Thus, applying SERVO power is the essential step to facilitate the proper functionality of jog controls.