the wire becoming blocked or restricted.
Use of an anti-spatter spray (Draper Stock No.05709)
will help keep the end result more tidy.
8.6 DEFINITION:
DUTY CYCLE:
Duty Cycle is a percentage of 10 mins. in which a
machine can operate at a rated load without overheating
and interruption from the thermal cut-out device.
Example:
150A @ 30% Duty factor
150A welding for 3 minutes
7 minutes down time
Example:
95A @ 100% Duty factor
95A continuous welding
To increase the operation time, reduce the amperage.
Note: The heating tests have been carried out at
ambient temperature and the duty cycle (duty factor) at
20°C has been determined by simulation
Definition:
METAL INERT-GAS (MIG welding)
Also known as
GMAW (Gas metal arc welding)
A welding process in which an electric arc forms
between a consumable wire electrode and the
workpiece metal(s), which heats the workpiece metal(s),
causing them to melt, and join. Along with the wire
electrode, a shielding gas feeds through the welding
gun, which shields the process from contaminants in the
air.
– 10 –
9. TROUBLESHOOTING
9.1 TROUBLESHOOTING
WARNING: For your own safety, turn the switch off and remove the plug from the power supply socket.
PROBLEM
POSSIBLE CAUSE
REQUIRED ACTION
Wire not feeding despite
wire feed pulley turning.
Dirty current nozzle (contact tip).
Clean.
Wire feed pulley set too tight.
Loosen.
Too low clamping pressure of the
wire feed pulley.
Increase the clamping pressure.
Interrupted or disruptive
wire supply.
Damaged current nozzle.
Replace.
Burnt current nozzle.
Replace
Dirty driving gear torch liner.
Clean.
Cut on worn driving gear.
Replace.
Electric arc turned off.
Poor contact between earth
clamp and part to be welded.
Tighten the pliers and check them,
remove paint and rust.
Short circuit between current
nozzle and gas supply pipe.
Clean or replace the current and gas
nozzle, remove dirt, paint and rust.
Too loose current nozzle.
Tighten the current nozzle firmly.
Welder suddenly stops
working after longer
operation.
Welder has overheated due to
too long use and the thermal
protection has activated.
Let the welder cool down.
IMPORTANT: Please note all repairs/service should be carried out by a qualified person.
10. MAINTENANCE
10.1 MAINTENANCE
Regular inspection and cleaning reduces the necessity
for maintenance operations and will keep your tool in
good working condition.
Warning: Remove the plug from the power supply.
Periodically the welder must be checked as detailed
below.
• Check the torch cable and ground cable connections.
• Clean the contact tip and the gas shroud with an iron
brush. Replace if worn.
• Clean the outside of the welder with a damp cloth.
• Every time the wire spool is replaced:
• Check the alignment, cleanliness and state of wear
of the wire roll.
• Remove any metal powder deposited on the wire
