In the paper industry, high-precision position synchronization control is often required, especially for paper cutters. In the case of extremely high position accuracy, the speed control of ordinary frequency converters can hardly meet the requirements. Generally, only AC servos are used to solve and realize the application scheme of high-precision position synchronous control in paper cutter.
1. Overview
In the paper industry, high-precision
position synchronization control is often required, especially for paper
cutters. In the case of extremely high position accuracy, the speed control of
ordinary frequency converters can hardly meet the requirements. Generally, only
AC servos are used to solve and realize the application scheme of
high-precision position synchronous control in paper cutter.
2. A brief introduction to the paper cutter
In the past, the working principle of the old-fashioned paper cutter
was simple. It was only driven by an asynchronous motor, and a reducer was used
to drag the feed and cutter. The length of the paper was changed by adjusting
the cutter reduction ratio. The application of this method is very simple,
but the error of the cut paper is relatively large, resulting in poor product
consistency, and the length of each cut paper is manually adjusted, which is
time-consuming. The principle of servo control is actually driven by a
servo motor. Since the servo motor can calculate the detailed number of
rotations, the distance of movement can be calculated. Inside the control
cabinet of the paper cutter is a servo driver and a moving substrate, which are
used to control the movement of the servo motor and calculate the relative
position. The servo drive receives the pulse command from the host
computer to drive the motor head to do the positioning. During the
positioning, the movement requires smooth and stableinterface. The speed of the
servo determines whether the working efficiency of the paper cutter can meet
the requirements of the customer. During high-speed positioning, the servo motor
cannot overshoot, oscillate, or set for too long.
3. Conclusions
Hangzhou Zhishan servo system is applied in several paper cutter
manufacturers in Zhejiang. The servo debugging is convenient, and the effect is
not worse than the overseas servo. Therefore, it has achieved a good
reputation among customers and helped them save costs.
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