Preparation of the blade ends, proper positioning and alignment in the clamping jaws, proper upset pressure for each blade width are essential.

1. Ends should be cut at right angles to the back edge of the blade.

2. Ends should be cleaned and should be free from oil/grease.

3. When the ends are placed in the welder jaws, there should be no overlapping of the blade. Excessive pressure results in a lapped weld, while inadequate pressure results in burnt out spots at the weld. Select right current setting.