Duro Dyne MF-12, Руководство пользователя, Страница: 2 / 6

TIMER ADJUSTMENT
The MF-12 has been designed and built to withstand
rugged shop and field usage. Constant, trouble-free
operation is assured with a minimum of maintenance.
The GUN TIP, the GROUND CLAMP and all CABLE CON-
NECTIONS should be kept clean to maintain a good
electrical contact. Wire brush the parts to remove
any oxidation or adhesive that may have accumulated
during the fastening operation.
"HEAT SINK"
The timer dial facing you on the front panel of the
unit, determines the duration of the weld cycle. For
maximum efficiency of the unit, the weld cycle should
be set for the shortest length of time necessary to
provide a good weld. An excessive amount of time does
not improve the weld. On the contrary, the resulting
weld may not be an acceptable one. It is recommended
that at the start of a production run, using a given
length of pin with a given gauge of metal, the opera-
tor take a few moments to determine the minimum
timer setting to perform the job and leave the timer
at that point.
NOTE:
There is a common misconception that the
longer the weld time, the stronger the weld. This is
not true. It is important that you follow the above in-
structions for maintaining the minimum weld time.
MAINTENANCE
Included with your MF-12 is a simple "heat sink" tool
that looks somewhat like a cookie cutter. This tool,
when placed behind the point of weld on bare metal,
will eliminate any mark on the metal by dissipating the
heat generated from the point of the weld. The use of
a copper sheet on the work bench will also eliminate
this mark.
ELECTRICAL REQUIREMENTS
Where duct is too large to put on a bench, snap the
ground clamp onto the duct and secure the insula-
tion quickly by welding the Clip Pins inside or outside
of the ducts as required. Eliminate the heat mark on
the duct using the simple "heat sink" supplied on the
opposite side of the weld.
BRING MF-12 TO THE WORK
MF-12 AS A BENCH TOOL
Connect the MF-12 to a 208-240 volts - 60 cycle - 30
amp fused power supply. The MF-12 unit uses 220
volt single phase. To wire to 220 volt single phase,
the green lead is ground and the white and black leads
are power. To wire to 220 volt three phase, the green
lead is ground and the white and black leads attach to
any two of the other three legs. It is suggested that
the unit not be wired into the power box permanently
but rather plugged in so that the unit may be quickly
unplugged and easily taken elsewhere in the shop or
on the job.
To use your work bench as a welding table, set the
MF-12 alongside or on top of the work bench. Cover
the bench top with a copper sheet (.025 inch) which
will act as a permanent ground when the duct work
is placed on the table top. Attach the MF-12 ground
clamp to the duct work or copper bench top. The Clip
Pins will quickly weld every time with no burn marks
or wasted pins due to misfires.
INSTALLING CLIP PINS
Clip Pins are welded as easily as "A", "B", "C".
"A"
Press down through the insu-
lation, twist the gun, and pull
the trigger. Do not release
the trigger until the timer
cycle has ended.
"B"
Position the Clip pin on the
Magnetic tip of hand gun.
The Clip Pins are
permanently welded
in position flush with
the insulation.
"C"
SERVICE
The MF-12 has been designed and built to withstand
rugged shop and field usage. The Indicator lights on
the front panel will help you to diagnose minor prob-
lems. If your MF-12 fails to operate follow this simple
procedure to find the defective component.
1. Pull the trigger and watch the lights. The green light (24
volts) and then the red light (220 volts) should flash
on and off.
2. If only the green light comes on, go to step 4.
3. If neither light comes on, press the WELD
CYCLE TEST switch on the front panel.
A . If both lights flash and the transformers
do not hum go to step 5.
B. If both lights flash and the transformers
hum, the problem is either a bad trigger
switch or bad switch cable.
C.
If only the green light flashes, go to step 4
D. If neither light flashes, replace 24 volt
transformer.
4.
Replace the weld activator.
5.
The problem is probably a bad weld transformer.
Call technical service for further assistance.
(1-800-899-3876)
Electrode #27237
Switch Assembly
# 27241
Gun Switch
#27245
Heat Sink #27009
TP
-8 W
elding Tip
# 27235
Gun Case # 27239
Gun Cable # 27234
Roll Pin #27238
Fibre Sleeve
#27236
Brass Jack # 27244
Case
Screws # 27240
17320 W
eld P
otentiometer
27324 Primar
y T
ransformer
17079 R
ubber F
oot
17310
24 V
olt T
ransformer
17313 T
erminal
Block
17140 W
eld
Activator
27325 Secondar
y T
ransformer
27326 Knob
27316 Red Status Light 27321 Front Handle 17327 Switch Cable Receptacle 27213 F
emale
Fl
us
h
M
ou
nt
C
am
lo
ck
39110 T
est Switch
27315 Green Status Light 17309 P
ower Switch
27317 P
ower Light
PA
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TS
L
O
CA
TI
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M
F-
1
2
W
IR
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