Roll diameter calculation device and calculation method for printing equipment

A calculation method and technology of printing equipment, which are applied in the direction of winding strip, transportation and packaging, thin material processing, etc., can solve the problems of poor coil diameter measurement accuracy, slow response to coil diameter changes, and poor stability, and achieve simple debugging, Good real-time, easy to cure effect
CN104692173AInactive Publication Date: 2015-06-10SHAANXI BEIREN PRINTING MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI BEIREN PRINTING MACHINERY
Publication Date
2015-06-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a roll diameter calculation device for printing equipment. The roll diameter calculation device comprises an encoder mounted on a winding and unwinding motor and a frequency converter, wherein the encoder is further connected with a high-speed counting module through a data line, the winding and unwinding motor is further sequentially connected with a winding and unwinding speed reducer and a winding and unwinding roll, the high-speed counting module is connected with a PLC (programmable logic controller), and the PLC is connected with the frequency converter. The roll diameter calculation device solves the problems of poor roll diameter measurement precision, slow reaction to roll diameter changes and poor stability in the prior art. The invention further discloses a method for calculating a roll diameter by using the roll diameter calculation device. Firstly, the number n of pulses transmitted by the encoder on the winding and unwinding motor is detected, and then the obtained number n of the pulses is sent to the PLC for calculation, so that the roll diameter d is obtained.
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Description

technical field

[0001] The invention belongs to the technical field of printing machinery and equipment, and relates to a roll diameter calculation device used on printing equipment. The invention also relates to a method for calculating the roll diameter by using the device. Background technique

[0002] At present, in the flexible packaging industry, including various printing, compounding, coating, slitting, inspection and other equipment, during the rewinding and unwinding process of the gravure printing machine, the diameter of the rewinding and unwinding is constantly changing, and the diameter change It will inevitably cause changes in the tension of the substrate. Under the condition that the braking torque is constant, the tension will increase when the diameter decreases. On the contrary, if the winding torque is constant, the tension will decrease as the winding diameter increases. This is determined by the inherent characteristics of the rewinding and unwinding...

Claims

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