Sunstone CD320DPM2 320Ws Dual Pulse Capacitive Discharge Resistance Spot Welder

Sunstone CD320DPM2 320Ws Dual Pulse Capacitive Discharge Resistance Spot Welder

The Sunstone CD320DPM2 is a 320 watt-second Capacitive Discharge (CD) resistance spot welder capable of single or dual pulse operation. In dual-pulse mode, the first pulse cleans the weld surface by heating away contaminants, and the second pulse performs the weld — both occurring within a tenth of a second. The unit accepts 120VAC or 240VAC input via a voltage selector switch located underneath the chassis, and is rated up to 240 welds per minute.

Specifications & What's Included

• Model: Sunstone CD320DPM2
• Weld energy: 320 watt seconds (Ws)
• Pulse operation: Single or Dual Pulse (selectable)
• Input voltage: 120 VAC @ 15A or 240 VAC @ 8A (switchable)
• Voltage selector: located underneath unit
• Fuse: 20A, 5×20mm
• Maximum weld rate: up to 240 welds/min
• Front panel: LCD display, Pulse 1 knob, Pulse 2 knob, Weld Energy knob, ON/OFF Pulses switch, dual weld-head cable ports (– and +), Power On/Off switch
• Rear panel: cooling fan, 110/220VAC inlet, 15A fuse holder, Beep On/Off switch, Ext. Trip jack
• No calibration required
• Certifications: CE; Made in USA
• Dimensions: 22" × 12" × 11"
• Includes: 2 weld heads (copper roller/clamp head and flat-tip stylus hand-piece) with cables, and ground clamp cable

Applications

Capacitive discharge resistance spot welders like the CD320DPM2 are widely used in precision joining applications where short, controlled energy pulses are needed to avoid heat damage to surrounding materials. The CD320DPM2 is commonly used for battery pack manufacturing (including lithium-ion and NiMH tab welding), cross-wire welding, thermocouple attachment, and welding small electronic components. It is well-suited for joining thin-gauge copper, aluminum, brass, and other non-ferrous sheet and wire — materials that are difficult to weld with conventional transformer-based welders due to their high thermal conductivity. The dual-pulse feature is particularly valued in production environments where consistent, contamination-free welds are required. Sunstone Engineering, based in the United States, has been a specialist manufacturer of CD and micro resistance welding equipment for industrial, R&D, and electronics manufacturing applications.