Describe the process for manually homing a CNC machine after a power outage, ensuring accurate repositioning.

Manually homing a CNC machine after a power outage is essential for re-establishing the machine's coordinate system and ensuring accurate repositioning. Homing, also known as referencing, involves moving each axis to a predefined home position, which serves as a known reference point for all subsequent movements. The process typically begins by ensuring the machine is clear of any obstructions and that the workpiece is securely clamped. Next, power on the CNC control system. After powering on, the control system will likely display an error message indicating that the machine has lost its position. Select the manual mode or jog mode on the control panel. This allows manual control of each axis. Locate the homing or reference button on the control panel. This button may be labeled differently depending on the machine manufacturer. Press the homing button for each axis, one at a time. The axis will move slowly toward its home position, typically activating a limit switch or encoder signal when it reaches the home position. The control system then precisely defines that position as the machine zero or home. It's crucial to move each axis individually and monitor the movement carefully to avoid collisions. Some machines have a specific homing sequence that must be followed. Consult the machine's documentation for the correct procedure. After all axes have been homed, the machine's coordinate system is re-established, and it is safe to resume normal operation. The work coordinate system (WCS) will likely need to be re-established as well using a touch probe or other means.