CHAPTER 4: DEVELOPING WELD SCHEDULES
DUAL PULSE 125
STORED ENERGY RESISTANCE WELDING POWER SUPPLY
990-270 4-3
WELD HEAD - Parameter: Area of Electrode Face
Use a flat electrode face for most applications. Use a "domed" face if surface oxides are a problem. If
either of the workpieces is a wire, the diameter of the electrode face should be equal to or greater than
the diameter of the wire. If both workpieces are flat, the face should be at least one-half the diameter of
the electrodes. In any event, "pencil point" electrodes reduce the overall quality of the welding process.
125DP POWER SUPPLY - Parameters: PULSE WIDTH, %ENERGY,
NUMBER OF PULSES
Select SHORT pulse width. See Chapter 2
Select Schedule 0. Weld Schedules can be developed using Schedule 0 and then they can be
copied to any other Schedule Number
Select 1ST PULSE %ENERGY @ 10%.
Select 2ND PULSE %ENERGY @ 000%. (See Dual Pulse Operation)
Dual Pulse Operation
Dual Pulse Operation can be helpful when welding plated materials, materials with heavy oxidation, or
small wires. See Chapter 4. For these applications start as follows:
Select 1ST PULSE %ENERGY @ 5%
Select 2ND PULSE %ENERGY @ 15%.
NOTE: The 1ST Pulse should be ½ to ⅓ the energy of the 2ND Pulse.
Make A Weld
Always observe safety precautions when welding.
CAUTION:
Wear your safety glasses.
Select [RUN] and [WELD] on the 125DP.
Position parts between electrodes.
Press the Footpedal or Footswitch to fire the Weld Pulse.
Assuming no weld occurred, increase %ENERGY in increments of 5% until the parts just weld.
If using Dual Pulse, increase the 2ND Pulse in increments of 5% and change the 1ST Pulse to maintain
the ½ to ⅓ ratio.
To Next Page