12
USER MANUAL
JEFMIG151-A
151A MIG WELDER - 230V 50Hz
www.jeffersontools.com
•
WARNING! ENSURE THAT YOU READ, UNDERSTAND AND APPLY SAFETY
INSTRUCTIONS BEFORE OPERATING THE WELDER. IF WELDING A VEHICLE,
DISCONNECT THE BATTERY OR FIT AN ELECTRONIC CIRCUIT PROTECTOR.
10.1
Polarity check:
Ensure that the welder is disconnected from the main power
supply, open the side panel and check that the polarity is correctly set up for
gasless operation. The earth clamp wire must be connected to the POSITIVE (+)
terminal and the power (torch) lead must be connected to the NEGATIVE (-)
terminal as shown in fig.10.
10.2
To ensure a complete circuit, the earth clamp must be securely
attached to the workpiece.
a) The weld area must also be free of paint, rust, grease, etc.
b) Obtain the best connection by grinding the point of contact on the workpiece before connecting the clamp.
10.3
If welding a vehicle, disconnect the battery or fit a “Electronic Circuit Protector” (available from your Jefferson dealer).
10.4
Set up the current switches to give the required power setting and adjust the wire speed accordingly.
10.5
During the welding process, wire drawn from the spool is automatically fed through an insulated liner in the torch cable
to the torch tip. The torch switch activates the wire feed roller (to stop wire feed release the switch). As wire comes into
contact with the workpiece an arc is struck. The arc melts the wire which is deposited into the weld.
For welding stainless steel or aluminium, this welder can be converted to a conventional
mig welder. To convert to gas, order a reel of regular wire, a bottle of suitable gas, tips and
nozzles and a conversion kit containing a regulator plus connection hoses, hose adaptor
and jubilee clips (see fig.12) from your local Jefferson dealer.
11.1
Check Polarity:
Ensure that the welder is disconnected from the mains power
supply and open the side panel and check that the polarity is correctly set up for
gas operation. The earth clamp wire must be connected to the NEGATIVE (-)
terminal and the power (torch) lead must be connected to the POSITIVE (+)
terminal as shown in fig.11.
11.2
Check wire feed roller:
If necessary, change and/or turn the wire feed roller (See
maintenance section 14) so that the appropriately sized groove is in line with the
drive path i.e. in the groove nearest to you.
11.3
Fit required wire:
Fit a reel of steel or aluminium wire (either 0.6 or 0.8mm).
11.4
Set the wire tension as described in section 8.2.
11.5
Mount the gas cylinder:
Strap the gas cylinder to the back of the machine. Two nylon straps are provided to hold small
cylinders in place. Thread the straps through the raised metal fixing loops on the back of the welder. Stand the gas
cylinder on the rear platform and fix the straps around it as shown in fig.12.
11.5.1 Close the flow regulator before screwing it onto the cylinder. Screwing down the regulator will automatically open the
cylinder valve. When the sound of gas escaping is heard screw the regulator one further turn only. This will be sufficient
to seal the cylinder.
WARNING! Excessive tightening of the flow regulator will over-compress the rubber sealing washer and allow the
gas to escape slowly without being detected.
11.6
Connect gas cylinder to welder gas input.
Push the small adaptor into one end of the larger diameter hose. Push the
other end of the hose onto the ribbed gas input connector on the back of the welder. Secure both ends of the hose with
the jubilee clips provided. Push one end of the smaller diameter gas hose into the open end of the adaptor and push the
other end into the regulator outlet, it will seal automatically. See fig. 12. To release the gas hose, press the collet inwards
on the quick couplers and pull the hose out.
10. Gasless Operation
11. Conversion to MIG (Gas) Welding
FIG. 10
FIG. 11
