CIGWELD Transmig 310 - Routine Maintenance and Inspection; Maintenance - Digital Meter Calibration

Transmig 210, 250, 310, 330
Page 26 of 31 DOC No: MIGTRN0001
Date: 14/09/98 Issue No: 2
xviii) Close wire-feeder compartment or replace side panel.
10. BASIC TROUBLESHOOTING
The basic level of troubleshooting is that which can be performed without special equipment or knowledge,
and without removing the covers from the Power Source / Wirefeeder.
If major components are faulty, then the Power Source / Wirefeeder should be returned to an Accredited
CIGWELD Service Agent for repair.
10.1 Solving Problems Beyond the Welding Terminals
The general approach to fix Gas Metal Arc Welding (GMAW) problems is to start at the wire spool
then work through to the MIG torch. There are two main areas where problems occur with
GMAW:
a) Porosity
When there is a gas problem the result is usually porosity within the weld metal. Porosity
always stems from some contaminant within the molten weld pool which is in the process of
escaping during solidification of the molten metal.
Contaminants range from no gas around the welding arc to dirt on the work piece surface.
Porosity can be reduced by checking the following points.
1. Gas cylinder contents and flow meter. -Ensure that the gas cylinder is not empty and the
flow meter is correctly adjusted to 15 litres per
minute.
2. Gas leaks. -Check for gas leaks between the regulator/cylinder
connection and in the gas hose to the Power
Source.
3. Internal gas hose in the Power Source. -Ensure the hose from the solenoid valve to the
torch adaptor has not fractured and that it is
connected to the torch adaptor.
4. Welding in a windy environment. -Shield the weld area from the wind or increase the
gas flow.
5. Welding dirty, oily, painted, oxidised or
greasy plate.
-Clean contaminates off the work piece.
6. Distance between the MIG torch nozzle
and the work piece.
-Keep the distance between the MIG torch nozzle
and the work piece to a minimum. Refer to section
8.3 on page 23.
7. Maintain the MIG torch in good working
order.
-Ensure that the gas holes are not blocked and gas
is exiting out of the torch nozzle. Refer to
CAUTION 11.
Do not restrict gas flow by allowing spatter to
build up inside the torch nozzle.
Check that the MIG torch O-rings are not
damaged.
CAUTION 11: Disengage the drive roll when testing for gas flow by ear.