Q&A
Item | Servo Ball-Screw Feed | Hydraulic Feed |
Control Principle | Controlled by a servo motor and ball screw, enabling programmable feed speed and position with high precision. | The saw blade feed is driven by a hydraulic cylinder, with feed speed regulated through hydraulic pressure and flow valves. |
Feed Accuracy | ±0.01 mm accuracy with programmable positioning. | ±0.01 mm accuracy as well, though positioning depends on mechanical end switches. |
Feed Speed Control | Multi-stage speeds (1–10 m/min) can be set via HMI for smooth feed and retract motion. | Speed varies with oil temperature — slower when cold, faster when warm, causing less stable motion. |
Protective Function | Equipped with automatic load-current detection and slowdown mechanism to protect the saw blade and structure. | No automatic detection; operator monitoring is required. |
Multi-Stage Cutting | Allows multiple feed speeds for different sections to optimize cutting time and quality. | Single global speed control; no multi-stage adjustment. |
Cutting Stability & Surface Quality | Feed and retract motions are precisely controlled by the servo, ensuring smooth operation, stable blade, and clean surface finish. | The hydraulic cylinder produces slight impact during forward and backward motion, which may cause blade vibration and visible saw marks on the cut surface. |
Retract Speed | Fast retract shortens cycle time and boosts productivity. | Fixed retract speed; longer cycle time. |
Energy & Maintenance | Energy-efficient, oil-free system requiring minimal maintenance. | Oil seals inside the hydraulic cylinder are consumables that wear over time and may cause oil leakage; periodic inspection and replacement are necessary. |
Cutting Efficiency | High efficiency — reduces idle travel and improves output. | Slightly lower efficiency due to safety allowance at each stroke. |
System Cost | Higher initial cost but better long-term stability and productivity. | Lower cost and simple structure, suitable for mass production. |
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The NC24L uses a hydraulic feed system, offering strong cutting force, mechanical stability, and lower cost — ideal for continuous operation and mass cutting of aluminum extrusions.
The NC24LS uses a servo-driven ball screw feed, allowing precise control of feed speed and position, with fast retract motion that shortens cycle time and enhances efficiency — perfect for high-speed, automated production lines.
Both models achieve a cutting accuracy of ±0.01 mm.
The servo system provides smoother feed motion and better cutting surface quality, while the hydraulic system excels in durability and cost efficiency for mass production.
Difference Explanation
The servo feed system utilizes a servo motor and ball screw to achieve high-precision programmable control.
It allows precise adjustment of feed speed and position, while automatically adapting cutting parameters based on material thickness and blade sharpness.
The system also features automatic load monitoring and rapid retract functions, which greatly reduce machining cycle time and enhance cutting stability.
Although the hydraulic feed can achieve the same level of accuracy, its feed speed is affected by oil temperature and flow variations, leading to slightly lower stability during prolonged operation.
Furthermore, its positioning relies on mechanical end switches, requiring safety allowances to prevent blade collision — which adds a few tenths of a second to each cutting cycle in high-speed production.
Overall, the hydraulic feed offers a cost advantage, whereas the servo feed system is better suited for modern automated production lines that prioritize high efficiency and precise control.
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please contact us directly or refer to the -What is the difference between hydraulic feed and servo feed?