LTR

Our partner LTR: wire tension control systems


LTR was founded in 2013 by the will of the owner Emma Lutrario to continue and improve the family business that, had been operating in the field of electrical windings and electro-mechanical assemblies for decades. LTR started designing and assembling tensioners for winding machines, using the experience as end users gained over the years. For this reason, today LTR can fulfill a variety of systems to control tension, not only for copper wires. For this reason, today LTR can implement various systems to control the tension of the wire, not only of copper. It is possible to satisfy the most demanding customer requirements, offering versatile and efficient products with an excellent quality / price ratio. A well organized Company ensures fast processing times for requests as well as an excellent after-sales service. Quality is never neglected. All products are "Made in Italy". All this makes LTR a reliable partner for the solution of any problem related to the control of the winding process. From 2019, Eternal Automation, Grassi Trade and LTR work closely together to offer customers commercial and technical assistance stationed in Europe both in terms of Eternal products and to complete our products with high quality wire tensioners.



PLF Series

Mechanical Tensioners with Side Wire Passage

Main features:

  • Side wire passage to save space on the winding machine;
  • Gradual and progressive setting of the brake thanks to the control of the rod’s position;
  • Excellent response to coiling’s high speeds and acceleration;
  • High wire recovery;
  • Low maintenance;
  • It’s possible to choose the wire passage in the pulleys according to the production requirements.

Optionals:

  • Wire breakage signal;
  • Pneumatic unlock of the brake.


  • Typhoon F-2

    Mechanical Tensioner with Side Wire Passage and Two Brakes

    Typhoon-F2 mechanical tensioner can be used for a wide range of wire diameters (both copper and aluminium). This peculiarity makes it very functional for the optimization of the production process of electric transformers where at least two windings with different diameter wires are needed.

    Main features:

    • Side wire passage;
    • Two mechanical brakes;
    • It’s possible to use one brake if necessary (useful for smaller wires).

    Optionals:

  • Pneumatic unlock of the brakes.


  • PRA series

    Mechanical Tensioners with Frontal Wire Passage

    PRA Tensioners are the evolution of the well known mechanical tensioners with lateral wire passage. There are 4 sizes of PRA Tensioners.

    Main features:

    • Frontal wire passage to save space on the winding machine;
    • Gradual and progressive setting of the brake thanks to the control of the arm position;
    • Excellent response to coiling’s high speeds and acceleration;
    • High wire recovery;
    • Low maintenance.
    • Optionals:

    • Wire breakage signal;
    • Pneumatic unlock of the brake.



    LEM Series

    Mechanical Tensioners with Frontal Wire Passage and Tension Viewer LEM Series

    LEM tensioners can be used on every winding machine without changes on any software and/or hardware. There are 4 sizes of LEM Tensioners

    Main features:

    • Frontal wire passage to save space on the winding machine;
    • Gradual and progressive setting of the brake thanks to the control of the rod’s position;
    • Excellent response to coiling’s high speeds and acceleration;
    • Load cell and electronic control with wire tension viewer thanks to a LCD display;
    • Software to set the load cell and the reading speed.
    • Optionals:

    • Wire breakage signal;
    • Alarms box;
    • Software for the graphic view of the wire tension during coiling phase and to set the load cell;
    • LEM-1 and LEM-2 have two springs, adjustable separately, that allow to manage with two different tensions, one during winding, one during wrapping.



    LEM-5

    Mechanical Tensioner with Frontal Wire Passage, Tension Viewer and Two Brakes

    LEM-5 tensioner can be used on all winding machines without changes on any software and/or hardware. It’s suitable for big copper wires. Thanks to its double breaks, the usable wires’ range is very wide. It can be used also for bifilar windings.

    Main features:

    • Frontal wire passage to save space on the winding machine;
    • Gradual and progressive setting of the brake thanks to the control of the rod’s position;
    • Excellent response to coiling’s high speeds and acceleration;
    • Load cell and electronic control with wire tension viewer thanks to a LCD display;
    • Software to set the load cell and the reading speed.
    • Optionals:

    • Mechanical version without display (PRA5);
    • Wire breakage signal;
    • Alarms box;
    • Software for the graphic view of the wire tension during coiling phase and to set the load cell.



    HERCULES

    Electric Tensioner with side Wire Passage and Two Magnetic Brakes

    The electric tensioner Hercules is suitable to use thick wires (both copper and aluminium). Thanks to the two brakes and the return pulleys, wire’s passage does not create tight corners, an indispensable condition for coiling with thick wires.

    Main features:

    • Unlocking brake with two independent push-buttons, which is essential for the positioning of the wire;
    • Load cell, electronics control and a LCD display used to display the tension constantly during the coiling process.
    • Simple installation on round pole (30 or 50mm diameter) thanks to the special clamps made of plastic material.
    • Optionals:

    • Possibility to adjust the two magnetic brakes separately by using 2 potentiometers . This solution allows to increase, decrease or exclude the tension on each brake;
    • Software for the graphic view of the wire tension during coiling phase and to set the load cell;
    • Alarms box.



    LEMP Series

    Electronic Tensioners with spring controlled rod.

    LEMP tensioners are the evolution of mechanical tensioners with display LEM series. There are 3 sizes of LEMP Tensioners

    Main featurers:

    • Gradual and progressive setting of the brake thanks to “closed loop” technology, on load cell, for a constant wire tension during all the winding process;
    • Frontal wire passage to save space on winding machine;
    • Rod controlled by an adjustable stretch spring;
    • Load cell and LCD display to a constant reading of the wire tension while winding;
    • Electrical wiring: cable connection supplied;
    • Magnetic brake.
    • Optionals:

    • Wire breaking signal;
    • Software to set load cell and to control reading speed (useful for rectangular coils);
    • Graphic Software to set PID;
    • Cables kit for alarms.



    TBA-2

    Electronic Tensioner with compressed air rod control

    Using the TBA-2 electronic tensioner it’s possible to change the wire tension especially during wrapping. p>

    Main features:

    • Gradual and progressive setting of the brake thanks to “closed loop” technology, on load cell, for a constant wire tension during all the winding process;
    • Frontal wire passage to save space on winding machine;
    • Rod controlled by compressed air actuator and a proportional valve;
    • Load cell and LCD display to a constant reading of the wire tension while winding.
    • Optionals:

    • Wire breaking signal;
    • Software to set load cell and to control reading speed (useful for rectangular coils);
    • Graphic software to set PID;
    • Cables kit for alarms.



    Newton M-6

    Electric Tensioner for Big or Flat Wires

    Main features:

    • Side wire passage;
    • Pneumatic rod (pressure variator not included);
    • Magnetic brake controlled by a potentiometer on the tensioner;
    • Power supply 24V DC;
    • Air supply (for the rod) max 8 bar.
    • Optionals:

    • Possibility to control the magnetic brake with 0-10V current directly from the winding machine.



    WAM Series

    Mechanical Tensioner with Frontal Wire Passage

    Main features:

    • Multiple tensioner with a wheelbase between its brakes that can be adapted to winding machine wheelbase;
    • Frontal wire passage to save space on the winding machine;
    • Gradual and progressive setting of the brake thanks to the control of the arm position;
    • Excellent response to coiling’s high speeds and acceleration;
    • Load Cell and Electronic Control with wire tension viewer thanks to a LCD display;
    • Software to set the load cell and the reading speed;
    • Cable connection KIT included.
    • Optionals:

    • Wire breaking signal;
    • Alarms box;
    • Software for the graphic view of the wire tension during coiling phase and to set the load cell;
    • Type P with magnetic brakes (closed loop);
    • Type E with electric brakes (opened loop).



    Newton E-6

    Mechanical Tensioner for Big or Flat Wires

    Main features:

    • Lateral wire passage;
    • Pneumatic rod (pressure variator not included);
    • Magnetic brakes controlled by two potentiometers on the tensioner;
    • Power supply 24V DC;
    • Air supply (for the rod) max 8 bar.
    • Optionals:

    • Possibility to control the magnetic brake with 0-10V current directly from the winding machine.



    Further information on LTR website: .

    Eternal Service, Eternal Quality

    Eternal Automation is a group created to offer machines for the world of electrical windings in general, such as the production of transformers, relays and solenoids, as well as entire production lines, on the European and Mediterranean markets.