Product Code: SAC
Availability: Pre-Order


Computational Tool for the Control of Arc Welding Processes Advanced welding source control system via microcomputer with graphical interface Developed for the Win...

Computational Tool for the Control of Arc Welding Processes

Advanced welding source control system via microcomputer with graphical interface

Developed for the Windows environment, SAC allows the user to control the welding source using a microcomputer via USB or other protocols. The system enables the use of a large number of arc welding processes, in their conventional modes, and also in advanced modes such as pulsed MIG, thermal pulsed MIG®, mixed mode MIG, controlled short circuit MIG, pulsed TIG, alternating TIG, pulsed plasma, alternating plasma.

  • SAC has an operator-friendly interface, which makes it easy to intervene with the different welding processes that the system controls, as well as providing tools that support the manipulation of welding waveforms in a simple and effective way.
  • Welding processes:
    - Coated electrode
    - MIG conventional
    - MIG Standard pulsed
    - MIG thermal pulsed®
    - MIG mixed mode
    - TIG normal
    - TIG pulsed
    - TIG alternating
    - Plasma normal
    - Plasma pulsed
    - Plasma alternating
  • Current waveform drawing tool for all processes.
  • Possibility of adjusting process parameters during welding.
  • Possibility of saving/reading welding process parameters and drawn waveforms on the hard disk.

Tool for drawing the current waveform
  • Different waveforms can be designed to increase productivity, test gases and mixtures, reduce costs or even improve knowledge of arc dynamics. The software interface is self-explanatory, containing graphics, text and videos.


  • The great thing about the system is that the user can create new waveforms using the graphical interface tool, in which it is possible to literally draw on the computer screen the waveform that the welding source will reproduce.

System requirements

  • 1.0 Ghz processor
  • 512 MB RAM
  • 500 MB of available hard disk space
  • 1 USB port
  • Keyboard and mouse or compatible pointing device
  • Video adapter and monitor (1024 x 768 px)

Conceptual Layout of the Advanced Control System

The platform's control system, as illustrated in the figure, is responsible for decoding the commands given by the operator and acting directly on the "system actuator". On the other hand, the "acquisition system" takes readings of the welding variables and displays them back to the user via the platform interface.

However, the conceptual layout of the SAC, when implemented, takes on formats that are in line with the technology available on the market and in the domain of the LABSOLDA team. Thus, the physical layout of the Advanced Control System has two microcomputers that communicate via their serial ports, responsible for the user interface, signal acquisition and process control. The system's actuator is a welding source.

Physical layout of the Advanced Control System


The use of two CPUs to implement the SAC comes from the fact that two different operating systems are required in the current design of the platform, Ms-Windows and Ms-DOS. As mentioned in chapter 2, despite providing highly functional tools for handling real-time processes, Ms-DOS does not provide a versatile user interface at the levels required by the SAC. On the other hand, Ms-Windows, which provides a highly intuitive operator interface, hinders substantial hardware intervention, which is extremely necessary for the effective control of welding processes.

To this end, the SAC's control structure was implemented on the "Oscilos v 3.1" program, a welding signal acquisition software also developed in the laboratory and entirely structured on the Ms-DOS operating system. In this way, all the intervention logic on the welding source was grouped together in "CPU 2", which controls both the welding processes and the signal acquisition.

The control interface, however, was fully developed on the Ms-Windows platform, "CPU 1", allowing quick access to the variables of each process, as well as making it flexible to draw welding waveforms in the different modalities, using the graphical tools that the platform in question makes available.

The use of two processing units, although inadequate from a functional and even economic point of view, allowed the SAC to be developed in parallel, speeding up progress in its implementation, as well as creating the concept of platform modularity, i.e. the perfect separation between each aspect of the system, control, acquisition, interface and actuation, which makes it able to adapt to new technological concepts.

SPS develops systems for welding, automation and instrumentation, serving sectors such as:

  • Education and Research;
  • Oil and Gas
  • Shipbuilding
  • Pulp and Paper
  • Mining
  • Energy
  • Agriculture
  • Pharmaceutical
  • Food;
  • Consumer goods.