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LT Rectilinear displacement transducer

LT Rectilinear displacement transducer
  • The transducer has been improved in order to guarantee greater reliability under all conditions
  • A sturdier structure makes the LT series even stronger for applications with heavy vibration
  • Installation is made simpler by the absence of electrical signal variation in output, outside the Theoretical Electrical Stroke
  • The new grooves provide an excellent alternative to the usual system of fastening with brackets
  • Ideal for applications on plastic injection presses, vertical presses, and on many other processing machines
 
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DataSheet
LT datasheet

Brochure
Brochure (Displacement Transducers)

Solution

Packaging

Gefran Packaging Solution

         

Precious objects or everyday products, foods, drinks, powders, cosmetics and pharmaceuticals all share a common need: the right packaging. An elegant package offering total safety and hygiene can contribute to the success of consumer products.

Vertical and horizontal packaging machines, dosers, fillers, formers, cartoners, hot melt, and hot air are just some of the machines used for this purpose. Packaging machine automation has to satisfy demands for cycle speed, precision checking, and repeatability, plus careful attention to aesthetics of the packaged product.

All aspects of system control must mesh perfectly to achieve these goals. Gefran offers a complete range of products for packaging machine automation, including industrial sensors for the acquisition of physical variables, plus actuators such as solid-state relays and SIEIDrive drives.

These instruments perform the following functions:
    • Supervision
    • Control of remote I/Os
    • Complete automations based on PLC and Soft-PLC structures

Gefran's new "GF_VEDO" operator panels completely control the machine, and can be programmed with the PLC languages approved by IEC-61131-3 and with on-board or remote I/O boards. Integration of sensors with control, supervision and actuation to field is standard practice for Gefran, which has always integrated its products in turnkey solutions.


Applications
Vertical packaging machines

The main functions of vertical ("form-fill-seal") machines are:
    • Forming container to required dimensions by sealing heat-seal film on bottom and longitudinal side
    • Precise dosing of product
    • Closing by sealing top of bag
    • Final cutting

Gefran's measurement, control, and actuation devices optimize the packaging process, which demands speed, precision, and accurate control of variables.


 Longitudinal seal
Continuous longitudinal sealing of film with high dynamics and low thermal mass is managed by PID loops in series GFX4 4-channel controllers. The solid-state relays with on-board heatsink are equipped with a "fast cycling" control.

 Positioning, Change, Format
The sealer / cutter group is positioned according to the formats to be produced. Position is read with series PZ linear potentiometers or with a PC. GILOGIK II remote I/O modules feed the potentiometers and read position with 16 bit resolution.

 Transverse seal
The discontinuous transverse seal is managed by GFX4 controller loops.

 Machine cycle and operator interface
The machine cycle is managed by the Soft-PLC functions of the GF_VEDO industrial terminals, programmable with languages approved by IEC-61131. The graphics pages are available on TFT screens with 3,5" to 15" touch screen.

 Inputs/Outputs control
GILOGIK II modules control all of the machine's digital and analog inputs/outputs, including direct signals from potentiometers, load cells, and pressure sensors.

 Diagnostics, Alarms, Protections
Any breaks in heating resistances, temperature sensors, and power junctions are diagnosed by the processor in the controllers and immediately generate alarm messages. The GFX4 controller houses fuses and fuse holders.

Wrappers

Multi-head baggers, Dosers





GF_VEDO
     • TFT operator panels, touch screen
     • Programmable in IEC-61131-3
     • HMI + SoftPLC functions in a single device
     • Range from 3.5" to 15", touch
     • Sturdy industrial construction, IP65, vibration resistant, fanless, diskless
     • Modbus RTU, Modbus TCP, CANopen, Ethernet TCP/IP connection

GFX4
     • 4-loop "power" controllers for fastening to DIN bar
     • Solid-state relays with heatsink on-board
     • Current transformers on-board
     • Fuses with fuse holders on-board
     • Modbus RTU, Modbus TCP, Ethernet IP, CANopen, DeviceNet, Profibus DP connection

Controllers / Indicators
     • Controllers with double displays, double PID heat/cool with automatic tuning
     • Indicators with direct inputs from load cells, fast, high resolution

Solid-state relays
     • With and without heatsink
     • With interrupted load diagnostics and alarm functions and diagnostics for short circuit

GILOGIK II
     • Remote I/O on Real Time Ethernet, Modbus TCP, CANopen, Profibus DP

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TC1M / TR1M
     • Platinum thermocouples and resistance thermometers
     • Mineral oxide isolation
     • Thermoelements are isolated from the outer sheathing with compact powder in continuous metal sheathing

TC1 / TR1
     • Platinum thermocouples and resistance thermometers
     • Stainless steel sheathing soldered at one end
     • Single or double element with hot junction isolated or massed

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ADV200
     • Inverter with field vector control
     • Power range: 0.75kW to 1.5MW
     • Programming in IEC-61131-3
     • Communication: Modbus RTU (Standard on board), CANopen, DeviceNet, Profibus

ADV20 / ADV50
     • Inverter with V/f control and Sensorless
     • Power range: 0.4kW to 11kW
     • Communication: Modbus RTU (Standard on board), CANopen, DeviceNet, Profibus

XVy-EV
     • Brushless drive
     • Power range: 0.75kW to 500kW
     • Programming in IEC-61131-3
     • Communication: Modbus RTU (Standard on board), CANopen, DeviceNet, Profibus

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Mobile hydraulics

Gefran Solution for Mobile Hydraulics

         

Gefran offers solutions that perform specific functions in the field of Mobile Hydraulics. Gefran linear displacement transducers, displacement sensors, and indicators are ideal for a wide variety of applications: from steering systems through to stability control and to suspensions.

Flexibility
Gefran displacement transducers are based on potentiometric and magnetostrictive technology and provide various performance levels according to application requirements. All of the products:
    • Include a high protection level (IP67 - IP68)
    • Resist high pressures (350-700 bar for cylinder models)
    • Heavy-duty, ready to install in harsh environments or outdoors, and include high resistance to vibration and shock
    • Powered with low voltage 10...30 Vcc

Installation of a linear displacement transducer in hydraulic cylinders:
Gefran offers 3 solutions

Outside the cylinder

Partially inside the cylinder

Completely inside the cylinder

External positioning
(next to cylinder)
• PC67
• PMA
• RK XL0319

Installation internal the cylinder
with sensor head outside
• IK4
• RK
• PMI
• IC

Installation completely internal
the cylinder
• RK
• RK-A
• RK-C
• PMI-SL


Applications
Earth-moving

Articulated wheel loaders include hydraulic systems for the movement of each joint. Many wheel loaders include visual or electronic on-off (inductive sensor) systems to adjust the loader arm. Using a displacement transducer with in-cab display provides more reliable and precise control.

 Display
The use of simple displays or graphic terminals allows integration with more advanced control systems.

 Checking pressure in hydraulic circuit
TK transmitters monitor oil pressure in the hydraulic circuit for checking vehicle load and stability.

 Roll-over prevention
The synergy of displacement transducers inside (IC, RK) or outside (PC67, PMA) the cylinder with pressure transmitters (TK) guarantees total working control of the bucket to maintain tilt even during load handling. Load control guarantees greater stability and safety.

 Steering system
RK displacement transducers are ideal for installation inside single-action cylinders normally used with hydrostatic steering units. The sensor is designed to guarantee resistance against vibration and shock typical in this application.

 Stability control
Suspension cylinders are an integral part of a sophisticated, electronically controlled system that guarantees vehicle flexibility and stability based on applied weights, work load, and ground conditions. RK and IC transducers are designed to provide precise and positive control in this type of application.

 Load handling control
The use of increasingly complex control systems to check vehicle position and movement of each joint requires the use of transducers with advanced interfaces, such as CANopen, available on all Gefran magnetostrictive transducers.


Lift

Agriculture



Gefran products for Mobile Hydraulics world



GF_VEDO / 2400 / 4T72
These instruments let you clearly and directly display values provided by installed sensors (for example, tool position), or perform complex calculations for active control of the vehicle.
 

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Displacement transducers
RK / RK-A / RK-C / IK4 / RK XL0319
     • Magnetostrictive technology                                        • Potentiometric technology
       Standard stroke: 50...4000 mm                                       Standard stroke: 50...1000 mm
       Protection up to IP68                                                       Protection up to IP67
       Resistance to vibrations up to 20g                                 Resistance to vibrations up to 20g
       Shock resistance up to 100g                                          Shock resistance up to 50g

Pressure transducers
The Gefran pressure sensor most appropriate for mobile hydraulic applications is the TK series with M12 (IP67) connector: pressure intervals usually range from 200 to 500 bar (3000 to 7500 psi).
     • Excellent accuract (0,25%)
     • High protection level (IP67)
     • Stability at high temperatures
     • Reliability

 

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Wood working machinery

GEFRAN offers a wide range of components for automating primary processes in the wood industry, as well as complete solutions, from sensor to actuator, for work processes and coupling of materials, surface finishing, painting, and storage:
- displacement, force, pressure transducers for precise positioning of mechanisms (size settings, cutting, etc.) and machine parameter control systems.
- sensors, controllers, programmers and actuators for all processes with heating phases (spreading, gluing, drying, bending, edging, etc.), and for programmed control of ambient parameters (humidity and temperature) in seasoning systems.
- positioners and level indicators for sanders.
- configurable indicators to display (on the machine or control panel) other parameters such as input/rpm’s, pieces produced, etc.
Choosing GEFRAN means giving added value to your system in terms of production flexibility, precision and repeatability, guaranteed by components that can sustain a high number of cycles under harsh conditions.



Blow Moulding

Blow Molding Machines

         

Gefran is a world leader in the field of automation solutions and industrial process controls. Gefran designs and produces sensors, systems, electronic components and drives intended for a wide variety of industrial markets and especially for plastic machines.

Its 30-year of experience lets Gefran offer the right solution for Blow molding machinery of every kind:
    • Extrusion continuous:
        - hydraulics
        - full electrics
    • Accumulator head
        - hydraulics
        - full electrics
    • Stretch Blow molding

Gefran products for Blow molding world



Blow molding machines control units and components able to manage the machine functionalities.
     • wide range display (from 10.4" up to 15"), touch screen or integrated keyboard
     • compact and robust (high resistance to vibrations)
     • remote I/Os with Real-Time Ethernet Fieldbus
     • easy insering in standard Fieldbus networks (Ethernet, Modbus, CANopen)
     • remote Fieldbus keyboards for the machine movements
     • remote and independent multiloop controllers available with integrated power units
     • SSR with heatsink

 

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Gefran's wide range of sensors offer the ability to measure the primary process variables: position, pressure, force, temperature and humidity.
The sensors portfolio includes:

     • new "IMPACT" Melt pressure series specifically designed for the hard Melt applications
     • pressure transmitters TPSA/TK for hydraulic pressure
     • pressure transmitters TSA for blow pressure control and leak tester
     • position transducers with magnetostrictive technology like IK for Parison actuator position control
     • position transducers with potentiometric technology (LT) or magnetostrictive technology (MK) can be used for clamp and translation movements
     • temperature sensors like thermocouples and RTD with customized designs
     • analog and Fieldbus output available
 

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SieiDrive ADV200 and XVy-EV are two drives families designed to control synchronous or asynchronous motors.
The SieiDrive ADV200 inverter can be used with asynchronous motors controlling the Extruders and pump in the Hydraulic machines.
     • power range from 0.75kW up to 1.5MW
     • Field Oriented Control in Sensorless mode

Servo drive type SieiDrive XVy-EV, for brushless motors, is used for clamp, translations, Parison and nozzle in the Full Electric machines.
     • power range from 1.5kW up to 315kW
     • Feedback from Resolver, Encoder SinCos and Absolute Encoder EnDat, SSI and Hyperface

Main features:
     • communication via GDNet and CANopen
     • integrated PLC under standard IEC 61131-3 (5 programming languages)
     • configuration tool integrating a software oscilloscope with synchronous sampling (buffered) at 250µsec us for an easy commissioning
 

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Chemical-Pharmaceutical

GEFRAN offers a wide range of sensors, indicators and controllers for the chemical pharmaceutical industry, suitable for processes that demand reliability, precision, diagnostics and data transmission to supervisory units.
There are many complete solutions for temperature control, with configurable acquisition inputs and outputs for electric heaters, fans, inverters, proportional or servo-controlled valves. Parameter recipes can be managed digital communication with PLCs and other control units. Heat profiles can also be run.
The wide range of products also includes controllers and programmers with advanced functions such as cascade and ratio controls.
The components are also ideal for plant expansion and maintenance, thanks to their great versatility in terms of possible installations, materials used for sensing elements, measurement ranges, resolution and sampling speed, types of output signals, digital communication and protocols.



Metalworking

GEFRAN SOLUTIONS FOR METALWORKING

GEFRAN offers a wide range of automation components for metalwork plants and machines, from melting to heat treatments, from deformation to surface finishing to cutting systems:
- displacement, force, pressure transducers for precise positioning of mechanisms (for example, press rollers, tools) and machine parameter control systems
- sensors, controllers, programmers and solid-state actuators for heat control and the running of temperature profiles (for example, in electric or gas furnaces for heat treatment of metals, washing and drying systems)
- level indicators and positioners (for rollers, benders, sanders, etc.) - maximum/minimum alarm units for safety devices
- configurable indicators to display (on the machine or control panel) other parameters such as input/rpm’s, pieces produced, etc.
- phase angle power solid-state relays to control voltage on transformer primaries (for example, in the furnace industry, welding, etc.).
- Gefran-Siei Servo drives for metal sheet cutting lines, including special software application for transversal cutting systems equipped with Feeder or Flying Shear.




» Feeder


FEEDER ROLL
The Feeder Roll is equipped with QL and HQL asynchronous motors (IP54 version) or HQLa asynchronous motors (IP23S version) complete with incremental encoder.
In highly dynamic applications, the Feeder Roll may be equipped with an SBM brushless motor and XVy-EV servo drive.
The motor is powered by an XVyA-EV servo drive that receives the encoder on the metric wheel as well as the motor encoder.
The Feeder control system is fully integrated in the drive
The drive is connected to the machine PLC via CANbus, GDnet, DeviceNet or Modbus.

BLADE FLYWHEEL MOTOR
The Flywheel Motor is powered by an AGy-EV drive. The drive is connected to the machine PLC via CANbus, DeviceNet or Modbus.


Download our documentation           




» Flying Shear


CARRIAGE MOTOR

The Carriage is equipped with QL and HQL asynchronous motors (IP54 version) or HQLa asynchronous motors (IP23S version) complete with incremental encoder.
The motor is powered by an XVyA-EV servo drive that receives the encoder on the metric wheel as well as the motor encoder.
In highly dynamic applications, the carriage may be equipped with an SBM brushless motor and XVy-EV servo drive.
The Flying Shear control system is fully integrated in the drive.
The drive is connected to the machine PLC via CANbus, GDnet, DeviceNet or Modbus.

BLADE FLYWHEEL MOTOR
The Flywheel Motor is powered by a drive in the AGy-EV series. The drive is connected to the machine PLC via CANbus, DeviceNet or Modbus.


Download our documentation           



News

Gefran now offers its customers another service: download 3D models of Gefran sensors

In constant contact with its customers when creating and designing applications, Gefran now satisfies their specific needs by providing a new, extremely useful and effective tool.