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U2 printers can support external photocell, encoder and warning light, their specifications
and installation method are described below:
7.1 External Photocell
Provide more reliable and precise sensing parameter
If internal photocell cannot be used because of printing position, please connect external
photocell.
Installation
7.2 External Encoder
Provide high print quality on unstable conveyor
Encoder detects the line speed so that printer can print correctly. Need to be set in a
place where can detect the same speed as the movement of the product.