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As critical post-process equipment in the printing, packaging, and paper processing industries, paper cutters' cutting accuracy and stability directly determine product quality and production efficiency. The leap in performance of modern paper cutters is largely due to the widespread use of these two precision mechanical components: ball screw and linear guide.
I. Ball Screw: The Core of Precision Positioning
A ball screw pair is a precision device that converts rotational motion into linear motion. Its core advantages lie in high precision, high efficiency, and low friction.
1. Main Functions in Paper Cutter Machines:
Driving the Paper Pusher (Back Gauge): This is its most core application. A servo motor drives the ball screw, controlling the precise linear movement of the paper pusher along the X-axis, accurately pushing the paper stack to be cut to the preset cutting position.
2. Core Technologies and Advantages:
High Transmission Efficiency: Due to the use of ball rolling friction, the transmission efficiency can reach over 90%, far exceeding the 20-40% of a sliding screw. This results in faster system response, lower energy loss, and the use of a smaller drive motor.
High Positioning Accuracy and Repeatability: The precision-ground lead screw and preload elimination mechanism effectively control transmission backlash and achieve micron-level positioning accuracy. This is crucial for ensuring consistent cutting dimensions across batches.
High Axial Rigidity: Able to withstand the significant axial loads generated during paper pushing, ensuring positioning stability and dynamic response performance under heavy loads.
II. Linear Guides: The Foundation for Motion Precision
Linear guides provide high-rigidity, high-precision linear guidance for moving parts, and withstand loads and torques from all directions.
1. Main Functions in Paper Cutter Machines:
Guiding the Paper Pusher: Ensures that the paper pusher, driven by the ball screw, moves along a strictly linear trajectory without any lateral drift or warping.
Supporting and Guiding the Cutting Blade: In high-performance paper cutters, the heavy cutting blade is supported by high-strength linear guides, ensuring a smooth and precise vertical descent, preventing uneven cutting surfaces or tool wear caused by blade tilt.
2. Core Technologies and Advantages:
Extremely High Motion Guidance Accuracy: The guide rails are precision-ground for exceptional straightness and parallelism, providing a reliable reference for the entire motion system.
Excellent Load Capacity and Rigidity: The multi-row ball recirculation design can simultaneously withstand radial, reverse radial, and lateral loads, as well as overturning moments, effectively resisting cutting shock and ensuring long-term machine stability.
Long-Term Accuracy Retention: The low-wear characteristics of rolling friction enable linear guides to maintain initial installation accuracy over time in high-speed, high-frequency operating environments, significantly extending equipment overhaul intervals.
III. System Synergy: Building a High-Performance Linear Motion Unit
In a paper cutter, the ball screw and linear guide do not operate independently; rather, they form a complete precision linear motion module.
Division of Labor and Collaboration: The ball screw, as the transmission element, provides power and controls displacement; the linear guide, as the guiding element, constrains motion trajectory and carries torque.
Performance Superposition: The combination of the two enables precise control of both force and position. The ball screw ensures the paper pusher moves in place, while the linear guide ensures it moves straight. This synergy ensures the paper cutter’s high speed, high precision, high dynamic response, and long life.
With years of technological accumulation and a deep understanding of market demand, our ball screws, linear guides and other transmission system components are widely used in multiple fields, helping customers improve production efficiency and product quality.