TE750 is a Tecna microprocessor welding control unit for resistance welding machines with inverter technology.

The task of the welding control unit is to manage the components of the welder, specifically the IGBT power unit that adjusts the welding current.

The TE750 may work with constant current regulation and fix adjustments.

The number of the inputs and outputs may be increased to better adapt the welding control unit to automatic machines. It is possible to store up to 150 different welding programs, 15 of which are recalled directly from an external device.

Each program consists of several programmable parameters that describes the working cycle.

In addition to the plain 4-stage welding cycle, the control unit allows the running of welding processes with pre-welding current, post-welding current, slope and pulses.


Simplified programming via 6 keys and a backlit alphanumeric LCD.

Inverter command with IGBT at medium, allowing choosing the inverter working frequency between 1000Hz and 4000Hz. Storage of 300 welding programs.

Each welding program may be given an 8-character alphanumeric identification.

Possibility of managing up to a maximum of 4 different welding transformers or up to a maximum of 4 different electrodes typologies through the same control unit.

Thermal protection for the welding transformer.

Up to 32 programmable parameters for each program.

Slope, pulses, pre-weld, post-weld functions and adjustment of the welding times with 1 ms resolution.

Display of the RMS welding current, energy, power, RMS electrodes voltage, original and final resistance, machine thermal use percentage measurements and, optionally, of the original thickness of the welded material and of the indentation at the end of the welding process.

6 operating modes: FIX, constant current, constant power, constant voltage, constant energy, DYNAMIC mode.

Limits relevant to: the welding current, electrodes voltage, energy, power, inverter use percentage, original and final resistance of the material to be welded; limit on the thickness and on the material indentation (optional).

Double stroke function Stepper function to compensate the electrodes wear with programmable curves.

Possibility of independently intervening on welding time and current through differentiated stepper laws.

Possibility of using 4 different stepper laws associated to 4 different spot counters which may be freely associated to each welding program.

Single and automatic cycle. WELD and NO-WELD function.

Control of 5 solenoid valves 24 VDC max. 5 W with self-protected output.

Self-adjustment at mains frequency 50/60 Hz.

Serial data transmission by means of optional insulated RS232 port.

Output for proportional solenoid valve.

Key for selecting foot control or two-hand control.

Selectable languages: Italian, English, French, German, Spanish, Hungarian, Swedish or Portuguese.

Possibility of upgrading the control unit Firmware via appropriate software.

Activation and control of the electrodes dressing.

Possibility of managing up to a maximum of 4 different simultaneous electrodes dressings through 4 different spot counters (optional).


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