Millermatic 251 technical manual

P appears on meters. Page 31 Trouble Remedy No wire feed. Turn Wire Speed control to higher setting see Section Clear obstruction in gun contact tip or liner see Sections , and Readjust drive roll pressure see Section Change to correct size drive rolls see Section Rethread welding wire see Section Place work clamp as close to the weld as possible. Material and wire type, joint design, fitup, position, shielding gas, etc.

Test welds to be sure they comply to specifications. Material thickness determines weld parameters. Conditions That Affect Weld Bead Shape NOTE Weld bead shape depends on gun angle, direction of travel, electrode extension stickout , travel speed, thickness of base metal, wire feed speed weld current , and voltage.

Page Gun Movement During Welding Gun Movement During Welding NOTE Normally, a single stringer bead is satisfactory for most narrow groove weld joints; however, for wide groove weld joints or bridging across gaps, a weave bead or multiple stringer beads works better. Select lower wire feed speed. Voltage too high. Select lower voltage range. Electrode extension stickout too long. Material too thick.

Joint preparation and design must provide access to bottom of groove while maintaining proper welding wire extension and arc characteristics. Unsteady hand.

Page Common Mig Shielding Gases Many different combinations mixtures of shielding gases have been developed over the years. The most commonly used shielding gases are listed in the following table. Wire slipping in drive rolls. Adjust pressure setting on wire feed rolls. Replace worn drive rolls if necessary. Wrong size gun liner or contact tip.

Match liner and contact tip to wire size and type. Incorrect voltage setting for selected wire feed speed on Readjust welding parameters. Page 45 Item Dia. Part Mkgs. Description Quantity Figure Main Assembly Fig Page 46 Hardware is common and not available unless listed. Page 47 Item Dia. RING, retaining spool Page 48 Ref. Page 49 Item Dia. I ONLY buy factory repair manuals, whether it be for a vehicle, appliance or whatever.

They are the only source of reliable information in my opinion. I don't mind paying for that information - as long as I am allowed access to it. If cruizer happens to have that information available that would be awesome. But I have not been able to find anywhere that sells these manuals outright in my on-line searches. Thank you for the kind words though. Miller Service Manuals Just got an email from Miller. Only to their Distributors and Miller Certified Repair Tech and even they have to have certain criteria in order to get them.

Which manual were you after? Cruiser, I had talked to you a while back regarding my with the "smooth start" issues while using v. Would have these? All rights reserved. Yes No. OK Cancel. Close pressure roll assembly. Tools Needed: Ref. Page Removing Knob From Front Panel Insert Allen wrench or stiff piece of wire into slot, and while depressing spring clip, slide knob off control shaft.

To reinstall, push knob fully onto control shaft. Page 38 Figure Page 40 Figure Page 42 Figure Page 44 Figure Page 46 Figure Page 48 Figure Page 50 Figure Page 52 Figure Page 53 Figure Page 56 Table Apply small amount of conductive electric compound Part No.

Model and serial number required when ordering parts from your local distributor. Page 60 Hardware is common and not available unless listed. Page 62 Figure TM Page 60 Millermatic Page 63 Figure Page 64 B Figure TM Page 62 Millermatic Page 65 Figure Page 66 Figure TM Page 64 Millermatic Page 69 Notes Page 70 Notes Page 71 Notes Print page 1 Print document 72 pages.

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