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ULTRAFEEDER represents the new generation BTSR solution, designed to meet the most demanding "constant tension" yarn feeding needs on a wide range of machines such as: sock/stocking, seamless, large diameter knitting machines, linear machines and several types of looms (cotton, Raschel, label and ribbon production,..).


Thanks to a new digital technology, featuring a dual control on yarn feeding and yarn running speed, ULTRAFEEDER assures absolute performance in terms of system acceleration/deceleration dynamics, very high resolution measurement capability (0.1 mm) of the yarn fed amount, besides a drastic savings of energy consumption.
The high torque provided by the new motor, even at 'zero' speed, assures the utmost control precision even when a high tension (90 gr) yarn feeding condition is combined with a very low speed (0.1 m/min), without the need of using pre-tensioning devices.



ULTRAFEEDER may operate with any type of yarn in a large number of applications, with thin bare (11,17 Dtex) covered, interlaced elastomers, nylon and cotton, for manufacturing of traditional and technical articles (e.g. medical socks, body, etc.).

Main Characteristics:

  • Programmable tension 0.2 gr ÷ 100 gr.
  • Yarn feeding speed up to 2500 m/min (@ 36V) and 1500 m/min (@ 24V)
  • New 'APPLICATIONS' Function: possibility to view and directly select the desired application from a navigation menu (socks, collants, seamless, medical, Raschel,..), without having to manually setup the relevant parameters.
  • INC/DEC Function: possibility to either INCrease or DECrease gradually the yarn tension with 0.1 gr.
  • LFA Function: exact measurement of yarn consumption (Absorbed Yarn Length) with 0.1mm resolution.
  • LFA self-learning Function: self-learning and control of consumed yarn with subsequent automatic machine stop, in case of LFA error exceeding the programmed tolerance.
  • TARGET Function: possibility to setup a production target (in m) with subsequent automatic machine stop
  • New AUTO OFFSET Function: automatic calibration of the loading cell (BTSR® patent)

primo blocco

Led Keys

Ergonomic keys for easy operations and synchronized alarm signaling.


Adjustable yarn coils separator which allows the utilization of every kind of yarn. Self-threading ceramic eyelets for an easy yarn insertion.


Large graphic display which allows a quick real time reading of all necessary information. Function keys for an easy access of the system menu.


Front and back alarm led light which allows to detect easily an alarm condition.


Tension measuring sensor of very high precision, with a very small measuring angle. Measure range 0,2gr - 100gr


SMART MATRIX controller allows to memorize, load, visualize and control even in graphic way as yarn tension, speed and yarn consumption (LFA)


Main Manufacturing Sectors


Main Application Processes

Circular Knitting Machines (socks/hosiery, medical fabrics)
Large Diameter Circular Machines
Seamless Circular Machines
Flat Knitting Machines
Narrow Fabric Looms
Special application on-demand




ULTRAFEEDER 2 - The latest technologies and innovative materials in a All-in-one Solution. Utmost accuracy in Hosiery, Seamless, Knitting applications.



UNI EN ISO 9001 - UNI EN ISO 14001
ISO 9001:2015
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ISO 14001:2015
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ISO 9001 int
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ISO 14001 int
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