How To Choose Servo Roll Feeder? - RUIHUI

Roller feeder and NC servo feeder are the two most commonly used feeding equipment for automatic processing of coil materials.

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The roller feeder is only suitable for the output shaft of various types of punching machines. The feeding width and feeding step are strictly limited. Usually, the material width is greater than 500mm or the feeding step is greater than 300mm, and the roller feeder cannot be selected.

However, the roller feeder also has its advantages, that is, it has a high-speed model, and the maximum feeding speed can reach 500 times/min, with a high-speed punch.

The NC servo feeder is not only suitable for all kinds of punching machines, but also can be used with various processing equipment such as hydraulic presses, shearing machines, laser cutting machines, etc. The feeding width and feeding step distance are unlimited, and the degree of customization is high. It uses proportional roller feeding. The device should be wide.However, the CNC servo feeder is not suitable for high-speed feeding due to the response time of the servo motor.

Roller feeder and servo feeder have different advantages and disadvantages respectively. It is difficult for customers to understand the difference between the two. How to choose a servo feeder suitable for their own production?

1. The type of NC feeder is selected by the thickness of the material. At present, the NC feeder produced in China is divided into three types: thin plate 0-2.2mm, medium plate 0-3.2mm, and thick plate 0-4.5mm according to the thickness of the material. , Relatively speaking, the thicker the thickness that can be achieved, the higher the price. ​​

2. Choose mechanical relaxation and pneumatic relaxation according to the different speed and matching equipment. The pneumatic NC feeder realizes the compression and relaxation of the roller group through the scaling of the cylinder fixed on the inner wall of the feeder. When it is in use, it can be matched with more equipment, not only can it be used with punching machine for punching and feeding, but also can be used with shearing machine for material blanking production. However, the reaction time of pneumatic relaxation is relatively long, so it is not suitable for short-step high-speed feeding production.

RF Series Servo Feeds

The exceptional mechanical design of the RF Series sets it apart from many other feed designs. Horizontal tie-bars provide significant structural rigidity. Feed rolls are full diameter across the entire rated width of the feed. Sealed-for-life spherical roller bearings are used to support the feed rolls.

All RF Series feeds can be equipped with a pull-thru straightener.

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The rolls raise and lower on a pivot, rather than up and down in a slide block, to ensure full gear mesh regardless of the thickness of the material.

The roll pressure is applied by two adjustable-stroke pneumatic cylinders. Roll pressure is adjusted by a supplied regulator. The same cylinders are also used for the pilot release of the upper feed roll. These cylinders are positioned well past the center point of the rolls to provide leverage for optimum pressure to the roll.

Servo Feed Controls

Universal Feed & Machine Corporation is proud to employ top quality controls on every servo feed. Universal Feed and Machine servo feeds utilize, as standard, a Control Techniques (Emerson) drive for superior performance. Since no components of the electronic system are proprietary, our customers have the option of using their local distributor for any replacement parts.

Optional I/O are available for more advanced systems. For example, our optional Line Automation allows any powered axis to be stored in the job recipe and automatically set to position when a given job is loaded.

Series control, standard on RF 2.5 and RF 3 models, with color touch screen operator interface.

Series control, standard on all RF 4 through RF 8 models, with color touch screen operator interface.

4-Roll Servo Feed

4-roll servo feeds from Universal Feed & Machine can be a good choice when running wide, lighter gauge material. Since four rolls contact the material instead of two, the per-roll pressure can be reduced. For sensitive materials where not marking or stretching the material is critical, a 4-roll feed may be the best choice.

These feeds benefit from a few construction advantages worth noting:

• The upper feed rolls are trunion-mounted (i.e., rolls pivot rather than go straight up and down as with a slide block design). Trunion mounted upper rolls are the standard on heavy-duty two-roll feeds as they increase the mechanical advantage of the roll and maintain complete gear mesh at all times.
• Upper rolls work together or independently. Unlike some other 4-roll feeds, Universal Feed & Machine four-roll servo feeds allow all four feed rolls to work together or independently. This adds flexibility to the line.
• All standard features and options of 2-roll feeds are also available for 4 roll feeds. Discuss your application with a Universal Feed & Machine sales rep to determine if your application is best suited for a 4-roll feed.