What is the purpose of installing a servo drive system on a die cutting press machine?

In the die cutting processing industry, precision and efficiency are matters of utmost importance. As market demands for product quality and production speed continue to rise, traditional transmission methods are gradually revealing their limitations. More and more cutting machines are beginning to be equipped with servo drive systems. What substantial changes can this technological upgrade actually bring to enterprises?

I. Why Does Die Cutting Press Machine Need a Transmission System Upgrade?
In the practical application of precision four-column cutting machines, traditional designs have been used in the market for a long time but are gradually showing certain drawbacks. Such equipment typically uses a single high-power motor paired with a flywheel as the power core, and transmits power to the cutting execution end through hydraulic valve banks and mechanical linkage mechanisms. The entire transmission path can be summarized as:
Motor → Flywheel → Oil Pump → Hydraulic Valve Bank → Cylinder → Cutting Platen**
In actual production, the processing accuracy of traditional solutions is generally only controllable within ±0.1mm, and as equipment operates over the long term, connecting rod wear causes further accuracy degradation. For today's increasingly demanding precision die-cutting products, this level of accuracy can no longer meet requirements.
II. The Core Value of Servo Drive Systems
1. A Qualitative Leap in Precision for Precision Four-Column Die Cutting Press Machines
This is one of the most core application directions. Traditional solutions use a motor with a flywheel, with the motor running continuously regardless of whether cutting is taking place. The servo drive solution uses a servo motor to directly drive the oil pump, achieving "on-demand oil supply." The servo drive system employs closed-loop control, equipped with high-resolution encoders (such as 23-bit absolute encoders) that can provide real-time feedback on position and speed information, forming a three-loop nested control consisting of current loop, speed loop, and position loop. Compared to traditional solutions, servo drives can improve machining accuracy from ±0.1mm to ±0.05mm, achieving a 100% improvement in accuracy.
2. Significant Improvement in Production Efficiency of Four-Column Die Cutting Press Machines
Under standard operating conditions, traditional hydraulic cutting machines typically operate at a cycle rate of about 8 to 12 strokes per minute (including the full sequence of feeding, positioning, cutting, and blade retraction). After installing a servo drive system:
Servo-hydraulic solution: By using a servo motor to supply oil on demand, idle waiting time is eliminated, and the cutting cycle can be increased to 15 to 20 strokes per minute, representing a speed increase of approximately 50% to 67%.
Full servo solution: The feeding servo, cutting servo, and carriage movement servo work in coordination, with parallel optimization of all actions, achieving a maximum cycle rate of over 25 strokes per minute.
III. Summary
The cutting cycle rate increases from 8 to 12 strokes per minute to 15 to 25 strokes per minute, and mold change time is reduced by 80%. At the same time, the elimination of complex hydraulic valve banks and flywheel mechanisms greatly reduces oil leakage risks and maintenance workload, while installation efficiency is improved by 70%. Although the initial investment is slightly higher, the comprehensive investment payback period is only 1 to 2 years, making it a key upgrade path for cutting processing enterprises to reduce costs, increase efficiency, and enhance competitiveness.