Systematics MP140 - CONNECTING OPTIONAL ACCESSORIES; CHANGING TO TIGIT2 OPERATION; CHANGING TO MHG7 SPOOL GUN OPERATION

20 Systematics , Inc. 1025 Saunders Lane West Chester, PA. 19380
3. Move the selector hose to the
"MHG7 SPOOL GUN" fitting and
tighten.
4. Install the thread cap (removed
in step 1) on the "MIG STANDARD"
fitting to prevent dirt and
contaminants from entering the
unused gas line.
5. Unplug the wire feed motor plug
from the function receptacle.
6. Plug the MHG7 spool gun control
cable plug into the welder
function receptacle.
7. Remove the torch selector cable
from the welder positive (+)
weld connector.
8. Plug the MHG7 gun cable fitting
into the welder positive (+)
weld connector.
NOTE
Make sure the gas regula-
tor and welder gas hose
are connected to a cylin-
der of the proper shield-
ing gas - 100% argon for
aluminum welding; 75% ar-
gon + 25% CO2 for steel
welding. 98% argon + 2% O2
is recommended for stain-
less steel welding.
9. Follow the operating instruc-
tions in the MHG7 manual(Form
WC5120).
10.To change back to standard MIG
operation, reverse the proce-
dure.
CONNECTING TIGIT2 OR MHG7
SPOOL GUN
CHANGING FROM STANDARD MIG OPERATION
TO TIGIT2 OPERATION
1. Unplug the wire feed motor plug
from the function receptacle.
2. Unplug the torch selector cable
and the work (ground) cable
from the welder front panel.
3. Plug the TIGIT2 torch power
cable into the negative (-)
weld connector and plug the
work (ground) cable into the
positive (+) weld connector.
This provides straight polar-
ity current as required for TIG
welding.
4. Plug the TIGIT2 torch switch
cord into the welder function
receptacle.
5. Attach the TIGIT2 torch gas
hose directly to the gas regu-
lator.
NOTE
Pure argon is the shield-
ing gas to be used for TIG
welding.
6. Follow the operating instruc-
tions in the TIGIT2 manual
(Form WC5227).
7. To change back to MIG opera-
tion, reverse the procedure.
CHANGING
FROM STANDARD MIG OPERATION
TO MHG7 SPOOL GUN OPERATION
All current model MIG machines
are equipped with bulkhead gas
fittings for quick and easy
changeover from standard MIG op-
eration to spool gun operation.
1. Remove the thread cap from the
"MHG7 SPOOL GUN" fitting.
2. Unscrew the selector hose from
the "MIG STANDARD" fitting.
FIG. 18. BULKHEAD CONNECTIONS
LABEL
WIRE FEED
MOTOR
BULKHEAD
FITTINGS
SELECTOR
HOSE
THREAD
CAP
WIRE FEED
MOTOR
PLUG
(PLUGGED
INTO
FUNCTION
RECEPTACLE)