Constant Current Controls

The WS2003 is an advanced controller designed to control a wide range of resistance welding machines. Because of its highly modular construction, it lends itself to integration into customer control cabinets and retrofits, as well as completely self-contained applications. The variety of "add on" accessories makes this controller one of the most versatile on the market.




  • 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


  • Fieldbus adapters – Profibus, Interbus, DeviceNet
  • 10/100Base-T Ethernet Adapter
  • 3-phase Adapter
  • Medium Frequency Adapter
  • Isolation Contactors
  • Earth-leakage Detector
  • Two-hand Start
  • Secondary Toroids
  • WSP3 hand-held Programming Pendant


  • 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


WS98-2003 PC Programming Software


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