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Why do high-end ribbon slitting machines use servo motors? Stability increased by 80%!

05. April, 2025delish0

The core reason for the high-end ribbon slitting machine is that it significantly improves the key performance such as tension control, slitting accuracy, and dynamic response, and truly achieves a leap in stability, efficiency and yield. Here's an in-depth breakdown:

First, the core advantages of servo motors

1. The tension control accuracy is increased by more than 80%.

• Traditional motor: relying on magnetic particle brake or mechanical clutch, the tension fluctuation range ±5%~10%.

• Servo Motors:

◦ Closed-loop control (real-time feedback from the encoder), the tension fluctuation can be controlled within ±0.5%.

◦ Example: When slitting a 1mm narrow ribbon, the servo system can stabilize the winding tension at 0.8±0.004kg to avoid belt breakage or interlayer sliding.

2. Extremely fast dynamic response

• The acceleration/deceleration time is shorter than that of the stepper motor by more than 50%, especially suitable for high-speed start and stop (such as non-stop for roll change when the slitting speed is 300 m/min).

• Application Scenarios:

◦ When slitting resin-based ribbons, transient load changes (e.g., uneven coating) can be compensated by the servo system in milliseconds.

3. The slitting accuracy reaches ±0.02mm

• The positioning repeatability error of servo motor + high-precision ball screw is ≤0.02mm, which meets the strict requirements of electronic grade ribbons (such as RFID tags).

• Comparison: The accuracy of traditional slitting machines is usually ±0.1mm.

4. Reduce energy consumption by 30%~50%

• Servo motors output torque only when needed, with little to no power consumption when no load is needed, while traditional motors waste energy by running continuously.

Why do high-end ribbon slitting machines use servo motors? Stability increased by 80%!

Second, how does the servo motor solve the pain points of ribbon slitting?

1. Eliminate "serpentine mistracking"

• The edge of the ribbon is easy to fluctuate during slitting (due to material elasticity or uneven coating), and the servo motor controls the deviation within ±0.3mm through real-time deviation correction (EPC system linkage).

2. Avoid "curling chrysanthemum patterns"

• The uneven winding tension of the traditional motor will cause the inner layer to be extruded and deformed (forming chrysanthemum-like folds), which can be perfectly solved by the taper tension control of the servo system.

3. Slitting ultra-thin ribbon does not break

• Ultra-thin ribbons below 6 μm are extremely sensitive to tension, and the "soft start" function of the servo motor prevents breakage due to excessive tension in the moment.

4. Compatible with multi-material slitting

• The same machine can quickly switch between servo parameters to cut wax-based, mixed-based and resin-based ribbons without mechanical adjustment.

Third, the servo system architecture of the high-end slitting machine

modulefunction
Main drive servoControl the speed of the slitting spindle to ensure that the linear speed is constant (±0.1%).
Rewinding/unwinding servoDouble servo synchronization, dynamic adjustment of tension (such as unwinding tension 2kg→ winding tension 1.8kg, taper 10%).
Guiding servoWith the photoelectric sensor, the ribbon position can be corrected in real time (response time≤ 20ms).
Tool servoPrecise control of the advance and retreat of the round knife (the overlap amount is adjustable by 0.01mm) to avoid incision burrs.

Why do high-end ribbon slitting machines use servo motors? Stability increased by 80%!

Fourth, the industry benchmark equipment case

1. Japan Iwata SL-1000

• Servo configuration: 6-axis servo system (Yaskawa Σ-7 series).

• Performance: Slitting speed 400 m/min, tension fluctuation ± 0.3%, suitable for 5μm ultra-thin resin ribbon.

2. German Muehlbauer TTS

• Innovation: servo motor + AI algorithm, automatically learn the characteristics of the ribbon and optimize the slitting parameters.

Fifth, why don't low-end equipment use servo motors?

1. Cost factor: The price of servo system is 3~5 times that of the traditional solution.

2. Technical threshold: It needs to be equipped with high-precision sensors and PLC programming, and the maintenance is complex.

3. Difference in demand: Low-end ribbons (such as ordinary labels) have low precision requirements, which can be met by traditional motors.

Why do high-end ribbon slitting machines use servo motors? Stability increased by 80%!

Sixth, user selection suggestions

• Required servo motor scenario:

◦ Slitting high-end resin-based/metal-based ribbons.

◦ Slitting width ≤0.5mm or speed≥200 m/min.

◦ The temperature and humidity of the production environment fluctuate greatly (the servo has strong anti-interference).

• Compromiseable Scenarios:

◦ Low-speed slitting (≤50 m/min) ordinary wax-based ribbons.

summary

Through the three core values of precise control, fast response and high efficiency and energy saving, the servo motor has become the "heart" of the high-end ribbon slitting machine, which directly determines the competitiveness of the product. For enterprises pursuing zero-defect slitting, servo system is not an option, but a must.