Micro controller Based Spot Welding Controllers: 3W-OL / 15 or WCU / 15

FEATURES

3W-OL/15 :Three consecutive programmable weld timings – preheat (W1), weld (W2), anneal (W3) with intermediate cool timings in one weld schedule to achieve high quality splash free welding.WCU/15 :Programmable WELD Time and Cool Time in a schedule.

  • Non-Volatile Memory (EEPROM) to store up to 20 weld schedules.
  • Easy to program with UP/DOWN and ENTER keys. Values programmed are indicated by a two-digit LED display. Individual operations within a weld schedule indicated by LEDs.
  • Key lock switch provided for SET and RUN mode.
  • Timings settable in terms of HALF / FULL cycles of mains supply frequency to achieve better resolution. Half cycle =10msec / cycle for 50Hz supply. OR Full cycle = 20msec / cycle for 50Hz supply.
  • Precise time and energy control ensures consistent weld quality.
  • ONE CYCLE and REPEAT CYCLE mode selectable by toggle switch. WELD / NO WELD switch provided on the front panel.
  • Two weld schedules Externally Selectable by Two Foot Switches. This features is suitable for spot welding Guns and multispot welding machines.
  • Dual Gun operation option available.
  • Non-Volatile Memory (EEPROM) to store up to 20 weld schedules.

SPECIFICATIONS

Input Supply : 230V / 415V AC, 50Hz/60Hz
Output : Gate- Cathode Drive signal to drive a pair of back to Back thyristors of any capacity.

  • Built in back to back thyristors for up to 95A primary current (optional).
  • Normally Open Relay contacts for Solenoid valves.
  • 2 Footswitch, 2 Valve operation suitable for Spot Welding Guns.
Compensation : Supply voltage fluctuation compensation. (Output Voltage remains within ±3 % as against ± 15% variation in mains voltage.)
Trigger : External Normally Open contacts of Footswitch. There are two options available:

  • Single / Double Initiation Footswitch
  • Two different schedules selectable by independent footswitches.

Note: ‘Forge Delay’ and ‘Multi-Spot’ options available on request.

ADJUSTMENT OF VARIOUS PARAMETERS POSSIBLE AS PER TABLE

Squeeze Time 0-99 half cycles Weld Energy (W2) 0-99% programmable
Preheat Time (W1) 0-99 half cycles Cool (2) Time 0-99 half cycles
Energy Level (W1) 0-99% programmable Anneal Time (W3) 0-99 half cycles
Cool (1) Time 0-99 half cycles Energy Level (W3) 0-99% programmable
Slope of W2 0-9 half cycles Hold Time 0-99 half cycles
Weld Time (W2) 0-99 half cycles Off Time (in repeat mode) 0-99 half cycles

APPLICATIONS

  • Precision Control of Resistance Spot Welding Machines of any capacity 0.1kVA to 300kVA.
  • Precision Control of Resistance Spot Welding Guns / Dual Guns etc.
  • Multi-Spot welding machines.
  • Retrofitting controls for any make / any capacity spot welders.