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Paper Making Machine Tension Control

2019-10-28
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The paper feeder used by our company's Goss 45 printing unit is MEGTEC's DLP 1000 series automatic paper feeder. The paper holder of this automatic Paper Machine uses the brake brake device to control the unwinding brake of the web, and can provide the paper belt tension for the printing press, but the tension of the paper tape increases as the radius of the paper roll decreases, in order to maintain The tension of the tape is constant, and the braking force acting on the disc brake of the core must be adjusted at any time, but some troubles often occur during the tension control of the tape. Below, the author will start from the control principle of the tape tension, sort out these faults and propose ways to eliminate them, and share them with the readers.

Paper belt tension control principle

The control principle of the tape tension is shown in Figure 1. The specific process is as follows.

Tension setting

The tape tension set value of the roll paper is input to the PLC device of the paper tray through the operation panel, ensuring that the tension of the paper tape leaving the paper feeding device during the transfer is in the range of 100 to 400N.

2. Given output

The PLC device of the paper tray controls the air pressure change of the floating roller cylinder by the paper tension tension given signal of the web through the electro-pneumatic conversion device (E/P).

3. Tension sensing

When the web tension of the web and the force of the dancer roll change, the dancer roller swings an angle around its pivot point. The 1POT of the tape tension angular displacement potentiometer mounted on the slewing bracket shaft will undergo a corresponding voltage change and the corresponding voltage signal will be transmitted to the PLC device of the paper tray again.


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