This discussion pertains to a typical setup, and differences may be expected depending on the equipment and your situation. I have the later torch tip. Some welding operators feel that because of this difference, more pressure is needed on the semiautomatic gun to hold the base metal pieces together. Thanks. Come in today and weld for 10 minutes and the wire was self feeding tries disconnecting everything and cleaning all connections and still same problem. Wondering if you have any ideas?? Judging the shape or size of the weld reinforcement (button) is not a good test for adequate fusion of an arc spot weld. I have a 2:52 Millermatic stock number 9 07321. I have to have the welding gun cable completely straight to get the wire to feed. Since good penetration is necessary for a good spot weld, the parameters of welding current and welding time are very important. The equipment can then be used for GMAW arc spot welding. I bought a BOC 275c welder. If you do not have the serial numbers the service technicians will not be able to accurately troubleshoot what may be happening. Some Miller Equipment with Spot timers built in that would work great of Gas Metal Arc spot welding on sheet metal: I will not stop here for very long since I already mentioned it, but it is still important part to keep in mind. Hey Nick, the company I work for purchased 4 Miller r-115 feeder heads in the last year and a half and we all seem to be having the same problem. Newly updated, the Gas Metal Arc Welding Publication was the first available of a series of updated publications from Miller Electric. The machine keeps giving the tip saver help code and won’t weld at all. We couldn’t figure out what was going on but by reading this article they now run like brand new. Nick – Thanks for the online opportunity. Looking at the main circuit board in the middle of the machine there is another 6-pin receptacle that looks just like the one that I just explained. Also, if the nozzle is too large in diameter or the contact tip extends too far from the end of the nozzle or if the contact tip-to-work distance is too great, shielding gas coverage will be impacted. When the drive rolls accumulate dirt on the flat surfaces, it will cause the wheels to separate and open up, loosening the grip on the wire. Anyway, I cleaned it up,  blew out stuff with compressed air, plugged it in and fired it up and it worked. Remember, gas connections and hoses downstream from the gas valve have to be checked with the gas flowing. I was fabricating on a chassis and everything was going great. This is because spot nozzles actually touch the base metal, and the weld is made within the nozzle diameter. It goes from burning back, to hammering the wire into the part. Two GMAW arc spot welds on mild steel show that CO2 gas can help provide better fusion than an Ar-O2 mixture where the two pieces of metal come together. However, the term spot weld is defined by the American Welding Society as: A weld made between or upon overlapping members in which coalescence may start and occur on the faying surfaces or may proceed from the outer surface of one member. In other words, there is insufficient heat in the weld to enable it to penetrate into the base metal. Other wire feed info. They do not carry a letter designation from the AWS like short circuit transfer (GMAW-S) and Pulse Spray transfer (GMAW-P) do. We had a Miller rep come in and swear it was the liner, however the same day he was there and we changed out everything my machine went right back to the chatter. And no, the auto feed is not on. MIG feeds wire well and smoothly, after welding for 10 seconds or so the arc starts pulsing/stuttering but the wire feeds smoothly. My 275c BOC advance welder is having a problem where once you start welding it won’t stop. OSHA, Occupational Safety and Health Standards for General Industry, Title 29, Code of Federal Regulations (CFR), Part 1910, Subpart Q, and Part 1926, Subpart J, from U.S. Government Printing Office, Superintendent of Documents, P.O. These projects include several farm trailers that are being used for personal use. Hi i have a 140 and it has stoped feeding the wire when you pull the trigger .The fan still runs but the wire feed motor will do nothing ,any one ... Hobart handler 140 will not feed wire ... Open gun and look for cause like short trigger wires. I’ve replaced the gun assembly and confirmed good continuity from the machine all the way to the weld tip. Diamond Core Technology delivers a superior arc with a … In other words, when you hit the button its making contact and it “sounds” normal, but the wheels aren’t turning. The smallest pinhole in a gas hose can act like a carburetor and draw in air, contaminating the weld. This document is not an application manual and does not contain a complete statement of all factors pertaining to those topics. Figure 116 showed some of the basic spot nozzles for different joints. On a large drum of wire, this function may be served by a mechanism that traces around the spool. Amazon.com: wire feed welder. The slots on the sides of the nozzle are for the gases to escape the weld area. This is because the welding current passes through the pieces to be welded, from one spot tong to another on the RSW equipment. Question : is there anything I should check that I’m overseeing ? I need help in figuring out what causes this, how to fix it, and how to prevent it. ... Welder Training & Testing Center Phone: (410) 687-8400. More is not necessarily better here.