Distance compensation method for operating apperatus during relative motion of two workpieces

An operating device comprising:

• a control system, a device for compensating spacing, a first workpiece assembly and a second workpiece assembly, said control system is communicatively connected to said first workpiece assembly and/or said second workpiece assembly, said first workpiece assembly is provided with a first sensor and a second sensor facing said second workpiece assembly;
• said first workpiece assembly and/or said second workpiece assembly is provided with the device for compensating spacing, said control system is communicatively connected to said device for compensating spacing, said first sensor, and said second sensor, respectively;
• said control system is used to control said first workpiece assembly and said second workpiece assembly to move relative to each other in a first direction and drive said first sensor to a target measurement position, and measure a first distance between said first workpiece assembly and said second workpiece assembly by said first sensor;
• said control system is used to control said first workpiece assembly and said second workpiece assembly to move relative to each other in the first direction and drive said second sensor to said target measurement position, and measure a second distance between said first workpiece assembly and said second workpiece assembly by said second sensor;
• said control system is further used to generate a control signal based on a first difference of subtracting the second distance from the first distance, and send the control signal to the device for compensating spacing;
• said distance compensation device is used to adjust a vertical spacing between said first workpiece assembly and said second workpiece assembly in a second direction according to the control signal, and the second direction is perpendicular to or has a vertical component to the first direction.