After raising the Reference module, the magnet adsorption is fixed, after the X-Y-Z module is reset, the X-Y-Z module is moved to the vicinity of the Reference module, and the three axes of the X-Y-Z are fine-tuned so that the module position checks gb close to the plane and pin of the Reference module. Read the coordinate information for the XY two axes at that location. Make it a fixed reference point for the X-Y-Z module (to establish a positional relationship with other modules based on this point).
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