Hobart Welding Products 250A manual Sequence Of Operation, 197 196

5-3. Sequence Of Operation

EXAMPLE Of Cutting Operation	. Moisture from the compressor will form in the air line and at
		the torch. It will be normal to sometimes see moisture come
		out the end of the torch.

The pilot arc starts immediately when trigger is pressed.

For shielded cutting, place drag shield on edge of metal. For non-shielded cutting, use 1/8 in (3.2 mm) standoff distance (dragging tip will reduce tip life).

Adjust torch speed so sparks go thru metal and out bottom of cut.

Raise trigger lock and press

trigger. Pilot arc starts.

Pause briefly at end of cut before releasing trigger.

After cutting arc starts, slowly start moving torch across metal.

Postflow continues for approx. 12 seconds after releasing trigger; cutting arc can be in- stantly restarted during postflow by raising trigger lock and pressing trigger.

As a convenience, the torch can be set up with two cutting combinations, either drag or non-shielded cutting. The torch comes standard with drag cutting.

.Maximum performance on thicker materials can be obtained by using non-shielded cutting with a 1/16 - 1/8 in (1.6 - 3.2 mm) standoff.

Drag Cutting

Use retaining cup (197 567) and drag shield (196 929) to obtain a 1/16 in (1.6 mm) standoff automatically. This combination is designed to allow dragging the torch directly on the workpiece.

Use shields for ease of use when cutting with a template, or when drag cutting is preferred.

197 567

196 929

Non-Shielded Cutting

Use retaining cup (196 928) and hold a 1/16-1/8 in (1.6-3.2 mm) standoff between the workpiece and cutting tip.

Use non-shielded when visually following a line.

. This combination can be used for drag cutting but does not provide optimum cutting performance on thicker material.

196 926

196 928

1/16-1/8 in (1.6-3.2 mm)

standoff

workpiece

801 400-A

OM-928 Page 14