Operation; Electrode Selection - Ryobi MMA-140 Owner's Operating Manual

Note: Before carrying out any assembly or
disassembly of the unit please ensure that the unit
is not connected to the electrical supply.
ASSEMBLING THE WELDING MASK
Attach the handle to the Welding Shield by lining
up the two rectangular tabs on the handle with the
corresponding holes in the welding shield and:
A. press the tabs through the holes and then
B. slide the tabs forward from the back, locking the
round tab in place.
Insert the clear glass panel followed by the dark
glass panel into the recess in the shield, refer to
Fig.2 & Fig.3.
The dark panel is a certified, specific optical class,
and should not be exchanged for any other type.
The clear glass panel should be replaced when it
becomes badly pitted.
WARNING! NEVER look at an electric
arc without eye protection as this can
injure the eyes permanently. ALWAYS
use a protection mask or welding helmet.
DESCRIPTION
Your Welding Power Supply features a single
phase transformer suitable for welding with an
alternating current using stick electrodes with
diameters from 1.6mm to 5mm. The welding cur-
rent is regulated by using the welding current con-
trol (regulator).

ELECTRODE SELECTION

The pages of this manual are restricted to the basic
safe use of an MMA welding power supply and very
basic welding technique. The electrodes used in
MMA welding are many and varied. You are
advised to seek advise from your local welding
equipment supplier for the correct selection of
electrode for the work being performed.

OPERATION

WARNING! If you have no welding
experience, we recommend you seek
training from an experienced person.
ASSEMBLY
OPERATION
welding or if you have internet access visit one of
the numerous welding related web sites to be able
to use the welding power supply to its full potential.
THE QUALITY OF ANY WELDED JOINT IS
DEPENDANT ON THE PREPARATION OF THE
JOINT THE SELECTION OF THE CORRECT
ELECTRODE AND THE SKILL AND
EXPERIENCE OF THE WELDER.
Ensure the Welding Power Supply is disconnected
from the mains supply.
Ensure that the area of the work piece where the
earth clamp is to be connected is clean using a file
or a grinder, to ensure a good electrical contact.
Ensure the earth lead is connected to the
workpiece, and the other lead to the electrode
holder.
15
B B
A A
Welding Shield
(viewed from front)
Fig. 2
Filter Lens
Welding Shield
(viewed from back)
Fig. 3
CAUTION: This manual is a basic guide
to welding. We recommend you
purchase a good quality publication on
Round
Tab
Handle