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All of YouYi's press automation solutions in one place.
News
Mechanical vs Pneumatic Servo Feeder: Which Relaxation System Is Better for Your Stamping Line?xation
August 30, 2025
In modern metal stamping automation, the servo feeder plays a key role in ensuring feeding accuracy and production stability.
One of the most important selection factors is the relaxation (release) system, which directly affects feeding speed, installation method, and application compatibility.
The two most common types are:
Mechanical relaxation servo feeder
Pneumatic relaxation servo feeder
Understanding their differences helps manufacturers improve efficiency and reduce downtime.
In a servo feeder, the relaxation system is responsible for releasing material tension during the stamping process. Proper relaxation ensures:
Smooth material feeding
Accurate positioning
Reduced material deformation
Stable stamping quality
The method used to achieve this—mechanical or pneumatic—directly impacts overall system performance.
The primary distinction between mechanical servo feeder and pneumatic servo feeder lies in the relaxation method. The mechanical NC feeder uses a mechanical rod to release tension (requiring the installation of a release rod on the press slide). This method is fast, prevents material damage, and is easy to adjust. When trial molding or refeeding the material, simply adjusting the release screw to contact the bearing allows the material to loosen. This makes operation simple and efficient.
The pneumatic servo feeder, on the other hand, does not require additional components to be added to the press. This makes installation straightforward, as it can be used with virtually any press machine and is compatible with shearing machines or other equipment for feeding operations. However, pneumatic relaxation is slower compared to mechanical systems, making it less suitable for high-speed feeding operations with short stroke distances.
The mechanical servo feeder requires the installation of a mechanical release rod on the slide, which is unsuitable for gantry presses or shearing machines. Despite this limitation, the mechanical relaxation system offers a rapid response, making it ideal for high-speed feeding operations with short strokes. It also provides better stability and easier operation compared to pneumatic systems.
When purchasing a servo feeder, it is essential to consider the features of the press and the nature of your production. Pneumatic feeders are ideal for applications where installation flexibility is crucial, while mechanical feeders excel in high-speed, short stroke feeding operations.
Manufacturers should choose between mechanical or pneumatic relaxation based on their production requirements and operational habits.
Q1: Which servo feeder is better for high-speed stamping?
Mechanical relaxation is better due to faster response.
Q2: Is pneumatic servo feeder easier to install?
Yes, it does not require modification on the press.
Both mechanical and pneumatic servo feeders have their own strengths. Mechanical systems excel in speed, precision, and stability, while pneumatic systems offer flexibility and ease of installation.
By understanding your production needs and equipment conditions, you can select the most suitable servo feeder to maximize efficiency and performance.
As a professional manufacturer with over 25 years of experience in stamping automation, Youyi Precision provides a full range of servo feeding solutions, including mechanical and pneumatic relaxation servo feeders. With strong engineering capability and rich application experience in coil processing lines, Youyi Precision helps manufacturers improve feeding accuracy, production stability, and overall automation efficiency.
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