4 c) The
travel path is made ready. d) The
welding power supply is connected to the power line. Welding
cable connections are made from the power supply to the welding
head, and to the work. e) Electrical
connections (described in the instruction book) are made
to the control unit, welding head, or self-propelled carriage, and
the work. 2. Preparing
the Workpieces a) The
most suitable type of joint design for the particular welding is
determined. The metal edges are prepared,
shaped, and cleaned. b)
Weld backing (if the joint is not structure-backed) is placed under
the seam. c) The
pieces to be welded are placed in position for welding. Usually
they are tacked welded, clamped together or held in jigs to
maintain the desired position.
