MacGregor Welding Systems offers a full range of closed loop power supplies for micro resistance welding based upon Linear DC and Twin Loop HFDC technologies. All MacGregor power supplies provide precise control of the welding output. Models are available from 600 to 18,000 Amps with a variety of features and options to ensure simple welding operation and integration.
Primary Power Supply Functions
- Output of Welding Current: The welding power supply is used to provide the weld energy required for the welding operation. The power supply capabilities are defined by the output current capability and machine duty cycle.
- Output Current Capability: The output current listed indicates the maximum output under load.
- Duty Cycle: The percentage of time that the welding power supply can operate at any given current setting is called the unit duty cycle. With a duty cycle of 5% at 1000 Amps, the unit is capable of outputting 1,000 Amps for 50 ms of every second. In high-speed applications or multiple weld head systems, the duty cycle should be reviewed to ensure the specified unit is suitable for the application.
- Control of Output: The power supply should regulate the output for each weld. A closed loop control system means that the output is controlled, monitored and adjusted based on feedback from the secondary circuit.
- Feedback: All MacGregor Welding Systems power supplies use a high response analogue feedback circuit. This provides near instantaneous response to variation and ensures the micro welding power supply is operating in real time.
- Weld Monitoring: Resistance Welding monitoring involves the monitoring of process variables and comparison of the values to programmed limits and allows resistance welding control. A weld monitor will detect variations in the process based on rules supplied by the user. A weld monitor does not indicate a good or bad weld, only one defined as an anomaly by the programmed limits.
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Linear DC Power Supplies
DC601P / DC1001P precision Linear DC welding power supply with graphical user interface and resistance welding monitor.
Linear DC is ideal for low current micro welding applications where precise control is critical. The use of Linear control technology ensures that the unit is capable of operating reliably at low output ranges. The graphical user interface provides the user with an unprecedented amount of process feedback, including oscilloscope type waveforms, in order to monitor process variables.
The DC1001P uses 3-phase supply allowing for longer pulse welding or higher duty applications.
The DC601P features single phase input allowing it to be installed in virtually any production environment.
Twin Loop HFDC Power Supplies
m3 Series high accuracy Twin Loop HFDC welding power supply with graphical user interface and welding monitor.
The m3 offers the most sophisticated and accurate control of the welding output available using inverter technology. A process driven control loop allows the power supply response to process variations to be near instantaneous. The m3 features a state of the art user interface allowing simple integration into automation or multiple spot weld head applications and features the most advanced welding monitor available. The m3 is ideal for applications requiring higher welding currents. Available models offer from 2,000 to 6,000 Amps with single or 3-phase supply.
m2 Series cost effective Twin Loop HFDC welding power supply with alpha-numeric LCD interface and embedded weld monitor.
The m2 offers a similar power control system to the m3 and is fitted with an alpha- numeric user interface in conjunction with high and low limit monitoring. The unit is aimed at single workstation applications and basic mechanised systems. It is available in 2,000 and 4,000 Amp variants.
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