VEVOR FLM-R30-FT Mode D'emploi page 446

Part diameter：left keyboard click on it, will pop up and dialog to input diameter of the part.
Focus length: left keyboard click on it, will pop up and dialog to input focus length of the F-θ
lens.
Note ：the 2 parameters effect the marking result directly
：means the relationship between the scanhead and the curved surface
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