Crown CT33098 Original Instructions Manual page 25

• The main practices of welding electrode handling
are described below:
• usually welding is carried out with vertically po-
sitioned electrode or at its inclination concerning a
seam, in a corner forward or back� When welding by
a corner back, it is provided better fusion and smaller
width of a seam (but performance of work in this case
demands the certain skill);
• progressive motion of an electrode (see fig. 4.6)
on a direction of an axis of the electrode, for main-
tenance of necessary arch length which should
make 0,5-1,1 of electrode diameter� The length of an
arch renders the serious influence on quality of a weld-
ed seam and its form� A long arch causes intensive oxi-
dation and nitration of the fused metal, and increased
splashing of it;
• longitudinal movement of an electrode (see
fig. 4.7) for formation of a welded seam� Speed of
movement of an electrode depends on electric cur-
rent, electrode's diameter, type and spatial position of
a seam;
at the high speed of an electrode the basic metal
has no time for fusion, what results in insufficient
depth of weld fusion spill is formed;
insufficient speed of moving of an electrode re-
sults in overheating and arc burn (through fusion)
of metal;
correctly chosen speed of longitudinal movement
along an axis of a welded seam allows obtaining its
width on 2-3 mm more than diameter of an electrode;
• lateral movement of an electrode (see fig. 4.8) -
for formation of the widened welded seam� An elec-
trode is moved in lateral oscillatory movements more
often with constant frequency and the amplitude,
combined with progressive motion of an electrode
along an axis of the prepared groove, and to an axis
of an electrode� Lateral oscillations of an electrode
are various and are determined by the form, the
sizes, positions of a seam in space in which welding
is carried out, and skill of the welder� The width of
a welded seam in this case should not exceed 2-3
diameters of an electrode�
• Watch the electrode length and when 20-30 mm is
left to the electrode holder 14 jaws - replace the elec-
trode�
• Wait for cooling down and crystallization of slag on
a welding seam upon which remove the slag using a
special hammer and a brush� You must wear protective
gloves or a mask when performing these operations�
• Check the welding seam quality and when the faults
are found remove them�
The manufacturer reserves the possibility to introduce changes.
• Following the completion of work, let the machine
cool down, switch it off and then disconnect the ca-
bles�
Machine maintenance / preventive meas-
ures
Before carrying out any works on the machine it
must be disconnected from the mains.
Cleaning of the machine
An indispensable condition for a safe long-term ex-
ploitation of the machine is to keep it clean� Regularly
flush the machine with compressed air thought the
vent holes 3�
After-sales service and application service
Our after-sales service responds to your questions
concerning maintenance and repair of your product as
well as spare parts� Information about service centers,
parts diagrams and information about spare parts can
also be found under: www.crown-tools.com�
Transportation of the machine
• Categorically not to drop any mechanical impact on
the packaging during transport�
• When unloading / loading is not allowed to use any
kind of technology that works on the principle of clamp-
ing packaging�
Environmental protection
Recycle raw materials instead of dispos-
ing as waste.
Machine,
should be sorted for environment-friendly
recycling�
The plastic components are labelled for categorized
recycling�
These instructions are printed on recycled paper man-
ufactured without chlorine�
English
25
accessories and packaging