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3.2 Preparing the Joint
Before welding, the surface of work piece needs to be free of dirt, rust, scale, oil or
paint. Or it will create brittle and porous weld. If the base metal pieces to be joined are
thick or heavy, it may be necessary to bevel the edges with a metal grinder. The correct
bevel should be around 60 degrees.
See following picture:
Based on different welding position, there are different welding joint, see following
images for more information.
4. Ground clamp connection
Clear any dirt, rust, scale, oil or paint on the ground clamp. Make certain you have
a good solid ground connection. A poor connection at the ground clamp will waste
power and heat. Make sure the ground clamp touches the metal.
5. Electrode
The welding electrode is a rod coated with a layer of flux. When welding, electrical
current flows between the electrode (rod) and the grounded metal work piece. The
intense heat of the arc between the rod and the grounded metal melts the electrode
and the flux. The most popular electrodes are:
- E6011 60,000 PSI tensile strength deep penetrating applications.
- E6013 60,000 PSI tensile strength used for poor fit up applications
WELDING MODE INDICATOR
When the welding mode MMA is selected, the indicator MMA will be on. When the
welding mode TIG is selected, the indicator TIG will be on.
VRD FUNCTION
Means when the machine is not in working status, the no load voltage will be
decreased to a very low safety voltage to prevent the electric shock.
INSTALLATION
1. Power requirement
AC single phase 240V, 50/60HZ fused with a 25amp time delayed fuse or circuit breaker
is required.
• The equipment class of CARiARC 140DB DC Inverter Arc Welder is class A.
• CARiARC 140DB DC Inverter Arc Welder adopt the drooping characteristic.
• High voltage danger from power source! Consult a qualified electrician for proper
installation of receptacle. This welder must be grounded while in use to protect the
operator from electrical shock.
• Do not remove grounding prong or alter the plug in any way. Do not use any adapters
between the welder’s power cord and the power source receptacle. Make sure the
POWER switch is OFF when connecting your welder’s power cord to a properly
grounded 240Vac, 50/60Hz, single phase.
2. Extension cord
During normal use an extension cord is not necessary. It is strongly recommended
that an extension cord should not be used because of the voltage drop they produce.
This drop in voltage can affect the performance of the welder. If you need to use an
extension cord it must be a #12 gauge cord at the smallest.
- Do not use an extension cord over 7.5 metres in length.
3. Setting up the work piece
3.1 Welding positions
There are two basic positions, for welding: Flat and Horizontal. Flat welding is generally
easier, faster, and allows for better penetration. If possible, the work piece should be
positioned so that the bead will run on a flat surface.
WARNING
Содержание CARiARC 140DB
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