Different welding techniques?

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What is the difference between spray, globular, and short circut? I see these words thrown around here but have no idea what they mean. Some explainations would be a big help. Thanks
Reply:huh?Yes some of my welds are globular, but Im working on that.  As a general rule I try not to spray, and try not to get short circuited.Could you elaborate?ThermalArc 185MillerMatic 180 w/ AutosetVictor Cutskill Oxy/AcetyleneThermal Dynamics Cutmaster 38and spite!
Reply:Here ya go.  http://en.wikipedia.org/wiki/Gas_met...transfer_modesDewayneDixieland WeldingMM350PLincoln 100Some torchesOther misc. tools
Reply:Originally Posted by hywyh8rWhat is the difference between spray, globular, and short circut? I see these words thrown around here but have no idea what they mean. Some explainations would be a big help. Thanks
Reply:Really good to know information guys.  I dont think Ive heard of this.  Makes perfect sense though.  Thanks!ThermalArc 185MillerMatic 180 w/ AutosetVictor Cutskill Oxy/AcetyleneThermal Dynamics Cutmaster 38and spite!
Reply:In MY opinion, globular is when the weld pieces are bigger than the wire and spray is when they are smaller than the wire.  You can only get globular with CO2 or C25 as gas.  To achieve spray, you need C20 or less or better yet Argon with 2% to 5% O2.Spray makes killer heat.  The last time I did it, my gas cone on the mig gun was RED.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:The mode of transfer is determined by the voltage... short circuit is between 18 - 21 volts, globular runs between 22 - 25 volts and spary is achieved from 26 - 32 or more. As you increase your voltage you need to increase the wire speed. Again wire size has an effect on the voltage. The larger the wire the more voltage needed to melt the wire. So your mode of transfer will change on the lower side of the ranges and the heavier wire on the higher side.   Gas is also a factor in the mode of transfer .... 98/2 would be for spray, but this mix doesn't work very well for short circuit. Same with 75/25... works well for short circuit but not for spray. I generally use a 92/8 or a 90/10 mix which works well for any of the transfer modes.    Short circuit is more for sheet metal, light gauge steel. Short circuit has a lower heat input which a plus for thin material and also reduces distrotion. It can also be use in any position.    Spray is for materials 1/8" and up.... It is has heavy heat input and a high deposition rate. Spray is pretty much limited to flat and horizonatl positions. The use of a pulse machine will allow spray to be used out of position.   Globular.... I pretty much don't use much. It can be somewhat of a messy process with a lot of spatter.... The welds don't usually have a nice appearence._________________Chris
Reply:Great info guys, I know alot of us non pro's here appreciate it.[QUOTE=lorenzo]The mode of transfer is determined by the voltage... short circuit is between 18 - 21 volts, globular runs between 22 - 25 volts and spary is achieved from 26 - 32 or more. So I have a MM175 and this site shows its "output" is 30-175 amps but "rated output" is 130A @20 VDC and 30% duty cycle. So which is it? And I am only doing short circuit as the welders max output is 20 VDC?http://www.millerwelds.com/products/...llermatic_175/ [QUOTE=lorenzo] Short circuit is more for sheet metal, light gauge steel. Short circuit has a lower heat input which a plus for thin material and also reduces distrotion. It can also be use in any position.    Spray is for materials 1/8" and up.... It is has heavy heat input and a high deposition rate. Spray is pretty much limited to flat and horizonatl positions.Would this be why sometimes when I weld there is a crackle sound and sometimes sounds more like fizz or high press air when welding different thicknesses? I just use the chart on the welder for now ( I know, throw it away) but the settings seem to be pretty much right. I haven't really experimented on changing the settings around too much yet. Busy making things (ie: LAZY
Reply:Those charts on my lincoln machines are dead on.  You might change by .5 volts for out of position or something, but generally they speak the truth.  Saves me a bunch of time.Hywy8r, I don't think a 175 has enough to spray.  My wirematic 250 will, but it would toast the 200 amp gun if I did it for long.  Rated output is what it will do regularly for 3 minutes out of 10.  Max output is what it could do for a short time.David
Reply:Originally Posted by hywyh8r  Would this be why sometimes when I weld there is a crackle sound and sometimes sounds more like fizz or high press air when welding different thicknesses?
Reply:Thanks guy's, good info