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Method for adjusting a web changing roll device and a web changing roll device

A roll paper and paper roll technology, applied in the field of roll paper changer devices, can solve the problems of wrong, disadvantageous, inaccurate known printing material roll thickness or inertia, etc.

Inactive Publication Date: 2015-09-02
MANROLAND WEB SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, because the thickness or the inertia of the web of printing material is not known precisely in advance, errors arise in the regulation by the cascade control loop, so that in particular when accelerating the web of printing material to the nominal peripheral speed in steady state Or overshoot may be formed during the transition of the rated speed, while the peripheral speed or speed should be kept at the corresponding rated value in the steady state
Such an overshoot impairs the regulation quality and is therefore disadvantageous

Method used

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  • Method for adjusting a web changing roll device and a web changing roll device
  • Method for adjusting a web changing roll device and a web changing roll device

Examples

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Embodiment Construction

[0017] figure 1 A block diagram showing an adjustment structure of a web changing roll device for a web rotary printing machine according to the present invention, wherein according to figure 1 A printing material web 12 is unwound from a printing material roll 10 whose direction of rotation is indicated by arrow 11 . The printing material roll 10 is driven by an electric motor 13 , wherein the electric motor 13 is actuated via a cascaded control circuit 14 consisting of a current regulator 15 and a speed regulator 16 superimposed on the current regulator 15 . The cascade control loop 14 is used to regulate the rotational speed of the motor 13 driving the printing material roll 10 and thus the rotational speed or peripheral speed of the printing material roll 10 or the web speed of the printing material web to be unwound from the printing material roll 10 . In the illustrated preferred embodiment, the control computer 17 and the cascade control circuit 14 cooperate. The spee...

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Abstract

The method involves applying a current precontrol value (24) as precontrol value, with which the initial value (22) of the speed controller (16) is charged for determining the input value (23) for the current controller (15) corresponding to the preset density of the print substrate roll (10). The precontrol value adapted corresponding to the current controller is matched with an actual current value (25).

Description

technical field [0001] The invention relates to a method for adjusting a web changing roll unit of a web printing press. The invention also relates to a web changing roll device of a web printing machine. Background technique [0002] The web changing roll device of the web printing machine first undertakes three main tasks. The first task is to unwind the printing material web at a limited web speed from the printing material web, and the second task is to unwind the printing material web at a limited web speed. Pressure is applied to the web of printing material that needs to be unwound, and a third task is to change the paper roll between the idling printing material roll and a new printing material roll. The roll paper changing roll device is also called the roll carrier. [0003] When unwinding a printing material web from a printing material roll, it is important to observe a defined web speed and to apply a defined web pressure. Conversely, if the paper roll should...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65H19/10B65H16/00
CPCB65H2511/13B65H23/182B65H2557/20B65H2557/25B65H2513/10B65H2513/21B65H2513/20
Inventor 贝恩德·梅赫尔斯马库斯·沙夫
Owner MANROLAND WEB SYST
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