MAIN FEATURES • SENSUM®

Medium frequency welders, designed to obtain high quality welding.
Cylinder with chrome plated stem for heavy duty works and long life; adjustable anti-rotation device.
Lubrication free pneumatic components to eliminate oil mist and to protect the environment.
Adjustable double-stroke cylinder with key control.
Built-in filter assembly with compressed air regulation device. Compressed air disconnecting device (excluding item 2112SH and 2112SH).
Electrodes speed control valves, shock absorber for end of stroke and air discharge silencers assuring the minimum noise.
Two stage electric foot control for clamping and welding pieces only if correctly positioned.
Pre-setting for additional double stage electric foot switch connection for the direct recalling of a different welding program.
Water-cooled transformer, plates, electrode-holders and electrodes; transformer with epoxy resin coated windings.
Arranged for all models: two-hand safety control with timer and removable key selector, assuring the best safety. The two-hand control device is standard on projection models only (it is available upon request on spot welder models).
Flow meter and thermometer with flow rate display on the control panel prevent the welding machine from operating without cooling.
Emergency push-button to stop the machine immediately.
New touch screen welding control with SENSUM® programmable interface.

 

Sensum® CONTROL CABINET FOR MEDIUM FREQUENCY WELDERS

The control cabinet, which controls the medium frequency welder, integrates the inverter Sensum®, the protection and safety devices. There are different sizes available, depending on the power of the welder. The cabinet can be placed on the working bench beside the welder.

Sensum® WELDING CONTROL INTERFACE

The Sensum® inverter unit is the core component of an inverter, dc current, resistance welding equipment. The following diagram shows the main components of a typical equipment.

The main Sensum® inverter unit functions are:
• management of the weld current,
• management of control devices and actuators,
• management of machine and welding process sensors.

The weld current is controlled by the unit by an inverter that supply the welding transformer with a medium frequency current. The welding transformer converts the primary current to a low voltage / high intensity DC weld current. The weld current may be measured by a Rogowski type current transducer, allowing to perform closed-loop current adjustment.
The unit can also manage the welding machine control devices and actuators, which are connected to the optional IO expansion board. The same board is also used to interface to optional sensors for machine and welding process monitoring. Up to 3 welding process sensors can be installed, chosen between position sensor, force sensor, pressure sensor and temperature sensor.
Unit programming and welder control is performed using a web user interface, provided by the unit internal web server. Allows both local and remote access by any web browser and easy integration in machine user interface.
The user interface manages different types of users with different roles. It can be used for configuration, programming and as operating interface.

Other main features of the Sensum® inverter unit are:
• Storage of 1000 welding programs.
• Configurable weld current profile with current slopes, pulses, pre-weld and post-weld functions.
• Fixed percentage, constant current, constant voltage, constant power and constant energy operating modes.
• Weld quality control by means of limits on measured weld parameters: weld current, RO adjustment ratio, weld voltage, weld power, weld energy, weldpiece resistance and optionally of weldpiece thickness, electrodes displacement, electrode force, cylinder pressure and weldpiece temperature.
• Electrodes management function for dressing and replacement.
• Stepper function to compensate the electrodes wear-out with programmable curves.
• Dual port Ethernet interface with integrated switch.
• Modbus TCP communication protocol.
• Optional fieldbus interfaces: EtherCAT©, PROFINET, EtherNet/IP.
• Multilingual support.