sharbel abdo wrote:Hello,
does anyone know what are the approximate register tolerances of a geared stack flexo press?
any guidelines on this issue?
I have seen stack presses that would print process jobs perfectly and others that required as much as 1/16 of trap to be correct. Mechanical soundness of keyways on the print cylinders as well as the register control hardware is critical. However, even with all that, I have found that tension control in and out of the stack is very important. Balancing the infeed and outfeed tensions will keep registration drift to a minimum.