Shielding Gas Guide; Load Wire - Forney 242 MIG Manual De Operación

Shielding Gas Guide

METAL
Mild Steel
Aluminium
Stainless Steel
Copper, Nickel & Alloys Argon
Contact the technical service of your gas supplier to know the percentages of the different gasses which
are the most suitable to your application.

Load Wire

Your MIG welder is designed to accept either 4", 8" or 12" wire spools of mild steel, stainless steel or
aluminum according to the type of metal you wish to weld. Wire spools are not supplied with the unit
and must be purchased separately.
BE SURE THE GAS AND ELECTRICAL SUPPLIES ARE DISCONNECTED. BEFORE
PROCEEDING, REMOVE THE NOZZLE AND THE CONTACT TIP FROM THE
TORCH.
• Open the side panel. Loosen the nut (A) of the spool holder (position 1) (brake drum).
Remove the spacer (E). In the case you are replacing the wire spool, extract it by pushing the
snap tongue (D) (Fig.4).
• Remove the plastic protection from the spool. Place it on the spool holder. Mount the spacer
again (only for 8" spools) and tighten the lock nut (A).
Your MIG welder can also accept 4" wire spools. To mount 4" spools:
• Remove the wire spool (B) from the spool holder (C).
• Loosen the nut (A), remove the spring and the washer; remove the spool holder (C)
from the pivot.
• Insert on the pivot the 4" wire spool; Mount the washer, the spacer (G) and the spring.
• Tighten the lock nut.
12
GAS
CO2
Argon + CO2
Argon + CO2 + Oxygen
Argon
Argon + Helium
Argon + CO2 + Oxygen
Argon + Oxygen
Argon + Helium
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NOTE
Argon controls spatter
Oxygen improves arc stability
Arc stability, good fusion and minimum spatter.
Higher heat input suitable for heavy sections.
Minimum porosity.
Arc stability.
Minimum spatter.
Suitable for light gauges because of low
flowability of the weld pool.
Higher heat input suitable for heavy sections.