| 摘要 |
In a method for setting a contact position of a printing roller with a central drum and an anilox roller with the printing roller in machines for flexographic printing, in which the printing roller and the anilox roller are activated in translation by at least an electric motor along a nearing/distancing direction between a no-contact position and a contact position and a contact position with the drum, respectively with the roller associated thereto, supply of an electric current to the electric motor (30,40) is commanded in accordance with a reference value, corresponding to a value of the current which value is just sufficient to cause translation of the roller along said nearing/distancing direction (D), to which a determined angular velocity of the electric motor corresponds. An encoder is then used to detect a lag between said angular velocity and the actual angular velocity, which sharply decreases at a moment of contact between the rollers. The electric motor is then halted and the encoder is used to measure an exact linear distance travelled by the roller up to the halting of the electric motor.
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