WS2003 Flat Pak

Constant Current Controls in Kit Form

The WS2003 Flat Pak Kit is a complete control pre-wired and shipped in two parts linked by a loom. It is an advanced controller designed to control a wide range of resistance welding machines. Kit configuration can be mounted in customer-provided enclosure.




  • Current Monitoring: High/Low limits and Pre-limit
  • Easy calibration to external monitor; Primary or Secondary sensors
  • Force Monitoring: High/Low limits in lbf and kN
  • Easy calibration to external force gauge


  • 3 Power Options – No SCR; water-cooled SCR sized to up to 150 kVA; water-cooled SCR sized up to 300 kVA


  • Welding modes: Single, Repeat & Half Cycle Spot, Single or Repeat, Seam, Dual Seam or Roll Spot
  • 64 weld programs
  • Constant Current – program weld current in kA
  • Programmable Force in lbf/kN (4-20 mA or 0-10 VDC)
  • Internal or binary program selection
  • Fault output with selectable Head-lock function
  • Weld History Log keeps last 64 welds
  • Wait for pressure function before weld
  • Upslope and Downslope
  • 16 inputs (24 VDC) and 12 outputs + SCR pulse drive (24 VDC can drive 110 VAC loads)
  • End of Sequence output
  • 3 modes of Retraction + Air/Oil (OHMA gun compatible)
  • Weld Counter
  • Stepper function with pre-set curves and end-blocking for up to 16 electrodes
  • Machine Logic Sequencer
  • Programmable outputs
  • RS232 port for pendant or PC connection

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