Assessments - 2, GPA: 4
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As Voltage switch setting increases, wire speed range also increases (see weld setting label in welding power source or Section 6-2, as applicable). 2 Power Switch 3 Voltage Switch The higher the selected number, the thicker the material that can be welded (see weld setting label in welding power source or Section 6-2, as applicable). Do not switch under load. Switch must “click” into detent position. 4 Trigger Switch When pressed, energized wire feeds and shielding gas flows. Ref. 228 178-A / Ref. 246 668-A 2 3 1 4 Notes OM-228 187 Page 21 6-2. Weld Parameter Chart Flux Cored E71T.11 “Set Polarity for (DCEN)” Solid Wire ER70S.6 “Set Polarity for (DCEP)” Solid Wire ER70S.6 “Set Polarity for (DCEP)” Stainless Steel “Set Polarity for (DCEP)” Aluminum** “Set Polarity for (DCEP)” Good for windy or outdoor applications Produces less spatter. Better appearance ~ 1/35 1/30 2/40 1/40 3/40 3/40 1/30 3/30 3/15 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ CFH ~ ~ OM-228 187 Page 22 227010 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 2/40 1/25 4/60 3/50 5/40 5/40 5/40 4/60 3/50 3/30 5/80 5/60 5/50 5/60 5/50 5/40 5/50 4/35 6/90 6/60 6/50 6/80 6/50 6 / 40* 6/60 5/35 6 / 70* 7 / 50* 7 / 90* 7 / 50* 5/40 6/40 7/70 7 / 40* 7 / 50* 7 / 60* 6 / 35* 7 / 80* 7 / 60* 7 / 50* 7 / 40* 1/35 3/50 2/50 4/40 3/35 4/40 6/604/503/40 6/504/303/35 7 / 50* 7/405/404/30 7/906/902/90 7/906/902 / 100 3/35 ~ ~ ~ 1/40 2/40 5/35 3/25 4/25 227010 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 2/40 1/25 4/60 3/50 5/40 5/40 5/40 4/60 3/50 3/30 5/80 5/60 5/50 5/60 5/50 5/40 5/50 4/35 6/90 6/60 6/50 6/80 6/50 6 / 40* 6/60 5/35 6 / 70* 7 / 50* 7 / 90* 7 / 50* 5/40 6/40 7/70 7 / 40* 7 / 50* 7 / 60* 6 / 35* 7 / 80* 7 / 60* 7 / 50* 7 / 40* 1/35 3/50 2/50 4/40 3/35 4/40 6/604/503/40 6/504/303/35 7 / 50* 7/405/404/30 7/906/902/90 7/906/902 / 100 3/35 ~ ~ ~ 1/40 2/40 5/35 3/25 4/25 227 010-A OM-228 187 Page 23 OM-228 187 Page 24 SECTION 7 . MAINTENANCE & TROUBLESHOOTING 7-1. Routine Maintenance ! Disconnect power before maintaining. 3 Months Replace unreadable labels. Repair or replace cracked weld cable. Clean and tighten weld terminals. 6 Months Blow out or vacuum inside. During heavy service, clean monthly. Or 7-2. Overload Protection 802 441 1 Supplementary Protector CB1 CB1 protects unit from overload. If CB1 opens, unit shuts down. Reset supplementary protector. 1 7-3. Drive Motor Protection Drive motor protection circuit protects drive motor from overload. If drive motor becomes inoperative, release gun trigger and wait until protection circuit resets allowing drive motor to feed wire again. OM-228 187 Page 25 7-4. Changing Drive Roll Or Wire Inlet Guide ! Turn off welding power source. 1 Inlet Wire Guide Securing Screw 2 Inlet Wire Guide Loosen screw. Slide tip as close to drive rolls as possible without touching. Tighten screw. 3 Retaining Pin To remove drive roll, push drive roll in and rotate it (1/4 turn) to the open slot and slide it out over the retaining pin. To secure drive roll, locate open slot and push drive roll completely over retaining pin, then rotate drive roll (1/4 turn) to closed slot. 4 Drive Roll The drive roll consists of two different sized grooves. The stamped markings on the end surface of the drive roll refers to the groove on the opposite side of the drive roll. The groove closest to the motor shaft is the proper groove to thread (see Section 5-10). Tools Needed: Ref. 803 714-A .030/.035 Groove .023/.025 Groove Stamped .024 Stamped .030/.035 3 1 2 4 OM-228 187 Page 26 7-5. Changing Nozzle, Contact Tip, Adapter And Liner, And Cleaning Gun Casing 246 669-A ! Turn off welding power source. 1 Nozzle 2 Contact Tip 3 Tip Adapter Wire size stamped on tip . check and match wire size. Tools Needed: 8 mm, 10 mm Lay gun cable out straight before installing new liner. Remove nozzle, contact tip, and adapter. Unscrew and remove liner. Blow out gun casing. Cut off wire and disconnect gun from feeder. 5/8 in. (16 mm) Liner Stickout Install Liner Reassemble gun in reverse order from taking it apart. 10 mm Head Tube 8 mm 1 2 3 Thread wire according to welding power source/wire feeder manual. OM-228 187 Page 27 7-6. Replacing Switch And/Or Head Tube 243 840-A Tools Needed: 15 mm Remove screws (5) and nuts (4). Remove handle halves. Hand-tighten head tube into cable connector. Place head tube in vice and tighten until nuts are tight. Remove from vice. Reposition handle halves, and install switch housing. ! Turn Off welding power source /wire feeder and disconnect gun. Remove switch housing. Install new switch and connect leads (polarity is not important). Reassemble in reverse order. If replacing head tube, continue to end of figure. 1 2 3 8 6 7 Remove screw on opposite side. Secure head tube in vice. Loosen jam nut. Remove from vice and turn head tube out by hand. 4 5 phillips Reinstall screws and nuts. 9 Reinstall screw on opposite side. 7-7. Troubleshooting Table Trouble Remedy No weld output; wire does not feed; fan does not run. Secure power cord plug in receptacle (see Section 5-7). Replac...