MF-12

®

MF-12 PARTS & SPECIFICATIONS

27005 TP-2 Tip27009 Heat Sink27315 Green Status Light27316 Red Status Light27317 Power Light17309 Power Switch39110 Test Switch27235 TP-8 Tip27236 Fibre Sleeve27237 Electrode27238 Roll Pin27240 Case Screws27244 Brass Jack27245 Gun Switch27246 Gun Case27241 Switch Wire Assembly27243 Gun Cable / Electrode27321 Electrode Assembly27318 Case Top Cover with Handle 27319 Case Body27320 Case Side Panel

17079 Rubber Foot27321 Front Handle27322 Top Handle27323 Rear Handle27217 Line Cord27253 Line Cord - Strain relief17313 Terminal Block27256 Aluminum Connector Block27257 U-Clamp & Nuts27324 MF-12 Primary Transformer27325 MF-12 Secondary Transformer17140 Weld Activator17310 24V Transformer27007 Gun & Cable Assembly27008 Ground Clamp Assembly17320 Weld Potentiometer27326 Weld Potentiometer Knob27213 Female Flush Mount Camlock17049 Male Camlock17327 Switch Cable Receptacle17288 Switch Cable Plug

ITEM DESCRIPTION ITEM DESCRIPTION

MF-12

MF-12

OWNER’SMANUAL

MF-12PINSPOTTER

MF-12

MF-12

MF-12

MF-12MF-12

MACHINERY DIVISION

MACHINERY DIVISION© 2005 Duro Dyne CorporationPrinted in USA 01/2005BI027115

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

27325 MF-12 Secondary Transformer

MF-12

27325 MF-12 Secondary Transformer

27213 Female Flush Mount Camlock

MF-12

27213 Female Flush Mount Camlock

® MF-12

MF-12

®

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

OWNER’SOWNER’SOWNER’SOWNER’SOWNER’SOWNER’SMANUALMANUALMANUALMANUALMANUALMANUALMANUAL

MF-12PINSPOTTER

MF-12

PINSPOTTER

MF-12

PINSPOTTER

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12 MACHINERY

DIVISION

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 PINSClip 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)

Ele

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de#

27

23

7

Sw

itch

Ass

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y#

27

24

1

Gun

Sw

itch

#2

72

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ink

#2

70

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TP-8

Wel

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Tip

# 2

72

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Gun

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27

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27

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PARTS

LO

CATI

ON

MF-

12 W

IRIN

G D

IAG

RA

M

MF-12

®

MF-12 PARTS & SPECIFICATIONS

27005 27009 27315 27316 27317 17309 39110

27235 27236 27237 27238 27240 27244 27245 27246 27243 27321 27318 27319 27320

TP-2 TipHeat SinkGreen Status LightRed Status LightPower LightPower SwitchTest SwitchGun Switch Assembly - 11ftTP-8 TipFibre SleeveElectrodeRoll PinCase ScrewsBrass JackGun SwitchGun CaseGun Cable / Electrode Electrode AssemblyCase Top Cover with Handle Case BodyCase Side Panel

17079 Rubber Foot27321 Front Handle27322 Top Handle27323 Rear Handle27217 Line Cord27253 Line Cord - Strain relief17313 Terminal Block27256 Aluminum Connector Block27257 27324 27325 17140 17310 27007 27008 17320 27326 27213 17049 17327

27276

U-Clamp & NutsMF-12 Primary Transformer MF-12 Secondary Transformer Weld Activator24V TransformerGun & Cable Assembly Ground Clamp Assembly Weld PotentiometerWeld Potentiometer Knob Female Flush Mount Camlock Male CamlockSwitch Cable Receptacle Switch Cable Plug

Universal Weld Gun16ft

ITEM DESCRIPTION ITEM DESCRIPTION

MF-12

MF-12

OWNER’SMANUAL

MF-12PINSPOTTER

MF-12

MF-12

MF-12

MF-12MF-12

MACHINERY DIVISION

MACHINERY DIVISION© 2005 Duro Dyne CorporationPrinted in USA 01/2005BI027115

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

27325 MF-12 Secondary Transformer

MF-12

27325 MF-12 Secondary Transformer

27213 Female Flush Mount Camlock

MF-12

27213 Female Flush Mount Camlock

® MF-12

MF-12

®

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

OWNER’SOWNER’SOWNER’SOWNER’SOWNER’SOWNER’SMANUALMANUALMANUALMANUALMANUALMANUALMANUAL

MF-12PINSPOTTER

MF-12

PINSPOTTER

MF-12

PINSPOTTER

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12 MACHINERY

DIVISION

27092

17288

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" toolthat 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 theheat generated from the point of the weld. The use ofa copper sheet on the work bench will also eliminatethis 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 - 30amp fused power supply. The MF-12 unit uses 220volt single phase. To wire to 220 volt single phase,the green lead is ground and the white and black leadsare power. To wire to 220 volt three phase, the greenlead is ground and the white and black leads attach toany two of the other three legs. It is suggested thatthe unit not be wired into the power box permanentlybut rather plugged in so that the unit may be quicklyunplugged and easily taken elsewhere in the shop oron 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 PINSClip 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"

SERVICEThe 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 (24volts) and then the red light (220 volts) should flashon 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 triggerswitch or bad switch cable.

C. If only the green light flashes, go to step 4D. 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)

Ele

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de#

27

23

7

Sw

itch

Ass

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27

24

1

Gun

Sw

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#2

72

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Hea

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Wel

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72

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Gun

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27

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27

31

7 P

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Lig

ht

PARTS

LOCA

TIO

N

MF-

12 W

IRIN

G D

IAG

RA

M

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" toolthat 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 theheat generated from the point of the weld. The use ofa copper sheet on the work bench will also eliminatethis 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 - 30amp fused power supply. The MF-12 unit uses 220volt single phase. To wire to 220 volt single phase,the green lead is ground and the white and black leadsare power. To wire to 220 volt three phase, the greenlead is ground and the white and black leads attach toany two of the other three legs. It is suggested thatthe unit not be wired into the power box permanentlybut rather plugged in so that the unit may be quicklyunplugged and easily taken elsewhere in the shop oron 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 PINSClip 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"

SERVICEThe 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 (24volts) and then the red light (220 volts) should flashon 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 triggerswitch or bad switch cable.

C. If only the green light flashes, go to step 4D. 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)

Ele

ctro

de#

27

23

7

Sw

itch

Ass

embl

y #

270

92

Gun

Sw

itch

#2

72

45

Hea

t S

ink

#2

70

09

TP-8

Wel

ding

Tip

# 2

72

35

Gun

Cas

e#

27

23

9

Gun

Cab

le#

27

23

4

Rol

l Pin

#2

72

38

Fibr

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leev

e#

27

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Jac

k#

27

24

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Scr

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# 2

72

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27

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Sta

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Ligh

t

17

30

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ower

Sw

itch

27

31

7 P

ower

Lig

ht

PARTS

LO

CATI

ON

MF-

12

WIR

ING

DIA

GRA

M

MF-12

®

MF-12 PARTS & SPECIFICATIONS

27005 TP-2 Tip27009 Heat Sink27315 Green Status Light27316 Red Status Light27317 Power Light17309 Power Switch39110 Test Switch27235 TP-8 Tip27236 Fibre Sleeve27237 Electrode27238 Roll Pin27240 Case Screws27244 Brass Jack27245 Gun Switch27246 Gun Case27241 Switch Wire Assembly27243 Gun Cable / Electrode27321 Electrode Assembly27318 Case Top Cover with Handle 27319 Case Body27320 Case Side Panel

17079 Rubber Foot27321 Front Handle27322 Top Handle27323 Rear Handle27217 Line Cord27253 Line Cord - Strain relief17313 Terminal Block27256 Aluminum Connector Block27257 U-Clamp & Nuts27324 MF-12 Primary Transformer27325 MF-12 Secondary Transformer17140 Weld Activator17310 24V Transformer27007 Gun & Cable Assembly27008 Ground Clamp Assembly17320 Weld Potentiometer27326 Weld Potentiometer Knob27213 Female Flush Mount Camlock17049 Male Camlock17327 Switch Cable Receptacle17288 Switch Cable Plug

ITEM DESCRIPTION ITEM DESCRIPTION

MF-12

MF-12

OWNER’SMANUAL

MF-12PINSPOTTER

MF-12

MF-12

MF-12

MF-12MF-12

MACHINERY DIVISION

MACHINERY DIVISION© 2005 Duro Dyne CorporationPrinted in USA 01/2005BI027115

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

27325 MF-12 Secondary Transformer

MF-12

27325 MF-12 Secondary Transformer

27213 Female Flush Mount Camlock

MF-12

27213 Female Flush Mount Camlock

® MF-12

MF-12

®

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

OWNER’SOWNER’SOWNER’SOWNER’SOWNER’SOWNER’SMANUALMANUALMANUALMANUALMANUALMANUALMANUAL

MF-12PINSPOTTER

MF-12

PINSPOTTER

MF-12

PINSPOTTER

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12

MF-12 MACHINERY

DIVISION