background image

Page      of  24 

18 

 

8.5 Spot welding 

There  are  three  methods  of  spot  welding:  Burn-Through,  Punch  and  Fill,  and  Lap.  Each  has 

advantages  and  disadvantages  depending  on  the  specific  application  as  well  as  personal 

preference. 

 

1. The BURN-THROUGH METHOD welds two overlapped pieces of metal together by burning 

through the top piece and into the bottom piece. With the burn-through method, larger wire 

diameters tend to work better than smaller diameters. Wire diameters that tend to work best, with 

the burn-through method are 0.035 inch self-shielding flux-core wire. Do not use 0.030 inch 

self-shielding flux core wires when using the burn-through method unless the metal is VERY thin or 

excessive filler metal build-up and minimal penetration is acceptable. Always select the HIGH heat 

setting with the burn-through method and tune in the wire speed prior to making a spot weld. 

 

2. The PUNCH AND FILL METHOD produces a weld with the most finished appearance of the three 

spot weld methods. In this method, a hole is punched or drilled into the top piece of metal and the 

arc is directed through the hole to penetrate into the bottom piece. The puddle is allowed to fill up 

the hole leaving a spot weld that is smooth and flush with the surface of the top piece. Select the 

wire diameter, heat setting, and tune in the wire speed as if you were welding the same thickness 

material with a continuous bead. 

 

3. The LAP SPOT METHOD directs the welding arc to penetrate the bottom and top pieces, at the 

same time, right along each side of the lap joint seam. Select the wire diameter, heat setting, and 

tune in the wire speed as if you were welding the same thickness material with a continuous bead. 

 

 

 

Summary of Contents for FC135T

Page 1: ...62 4045 FC135T OWNER S MANUAL 03 2018 WARNING Read carefully and understand all ASSEMBLY AND OPERATION INSTRUCTIONS before operating Failure to follow the safety rules and other basic safety precautio...

Page 2: ...contact tip adapter MIG gun liner drive roll electrode holder ground clamps Plasma torch parts nozzle electrode diffuser cover are considered consumable items and are not covered under warranty 90 da...

Page 3: ...r poorly ventilated areas Always have your welder maintained by a qualified technician in accordance with local state and national codes Always be aware of your work environment Be sure to keep other...

Page 4: ...ce or ground Do not attempt to repair or maintain the welder while the power is on Inspect all cables and cords for any exposed wire and replace immediately if found Use only recommended replacement c...

Page 5: ...Remove all flammable materials within 35 feet of the welding arc If removal is not possible tightly cover them with fireproof covers Take precautions to ensure that flying sparks do not cause fires o...

Page 6: ...der cap whenever possible 1 5 Proper Care Maintenance and Repair Always have power disconnected when working on internal components Do not touch or handle PC board without being properly grounded with...

Page 7: ...for light industrial applications FOR USE WITH FLUX CORE WIRE ONLY ON OFF Switch In the OFF position no power is being supplied to the torch In the ON position power is supplied to the main transforme...

Page 8: ...tighten INSTALLATION Electrical Shock High voltage danger from power source Consult a qualified electrician for proper installation of receptacle This cutter must be grounded while in use to protect...

Page 9: ...wire from the drive compartment of the welder d Rotate the Drive Roller Cap 3 counterclockwise and remove it from the Drive Roller e Pull the Drive Roller off of the Drive Roller shaft f Based on the...

Page 10: ...his welder is live whenever the torch trigger is pulled Make certain POWER is turned OFF c Remove the nozzle and contact tip from the end of the torch assembly d Make sure the proper groove on the dri...

Page 11: ...er problem i With the welder disconnected form the power source remove the leading end of the wire from the spool Hold on to it securely so as not to allow unspooling or tangling of the wire as it wil...

Page 12: ...ame diameter as the wire being used NOTE Due to inherent variances in flux cored welding wire it may be necessary to use a contact tip one size larger than your flux core wire if wire jams occur v Sli...

Page 13: ...the wire is fed out of the welding torch The wire speed needs to be closely matched tuned in to the rate at which it is being melted off Some things that affect wire speed selection are the type and d...

Page 14: ...he work piece See HOLDING THE TORCH section if you are uncertain of the angle at which you will be welding 7 4 Set the wire feed speed based on the thickness of material and the set up chart on the ba...

Page 15: ...he rate at which the torch is being pushed or pulled along the weld joint For a fixed heat setting the faster the travel speed the lower the penetration and the lower and narrower the finished weld be...

Page 16: ...or angle B is about 30 degrees DOWN from being perpendicular to the work piece VERTICAL POSITION It is easier for many people to pull the torch from top to bottom It can be difficult to prevent the pu...

Page 17: ...ve to be welded closed In most cases more than one pass or bead will need to be laid into the joint to close the V Laying more than one bead into the same weld joint is known as a multiple pass weld T...

Page 18: ...cceptable Always select the HIGH heat setting with the burn through method and tune in the wire speed prior to making a spot weld 2 The PUNCH AND FILL METHOD produces a weld with the most finished app...

Page 19: ...OM POSSIBLE CAUSE CORRECTIVE ACTION Unit Does Not Power Up Unit Is Not Plugged In Plug In Unit Input Power Circuit Breaker Not On Reset Input Power Circuit Breaker The Main Power Switch Is Not Working...

Page 20: ...Page of 24 20 ELECTRICAL DIAGRAM...

Page 21: ...Page of 24 21 DIAGRAM PARTS LIST...

Page 22: ...0415 BOTTOM 1 14 105200416 MOTOR CONTROL BOARD 1 15 105200417 HANDLE 1 16 105200418 MAIN TRANSFORMER 1 17 105200025 THERMOSTAT 1 18 105200024 FEET 4 19 105200008 CIRCUIT BREAKER 1 20 105200419 CONTROL...

Page 23: ...CORE NOZZLE 1 2 105200043 030 CONTACT TIP 1 3 105200033 CONTACT TIP ADAPTER 1 4 105200104 TORCH INSULATOR 1 5 105200105 TORCH LINER 1 6 105200106 TORCH HEAD TUBE 1 For replacement parts and technical...

Page 24: ...Page of 24 24 METAL MAN WORK GEAR CO 1760 Prospect Ct Suite 120 Appleton WI 54914 888 762 4045 www metalmangear com Made in China...

Reviews: