Pulsed Spray wave forms

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Maybe this should be in electrical, Idunno.I have been wanting to do this.  I hooked my V350 to a scope to see what it does.  Here are the results.  There is software to download the info to my puter, but I don't have it, so I took pics of the screen.Fist is VOLTS vs TIME.   From my automotive background the squiggily lines after the spikes are a cap recharging.Next is AMPS Vs Time.  .045 wire, 250 ipm, wave control turned all the way up.  The instructions for the V350 say turn the wave control up and the background current drops and frequency increases.  Now I can see that.  1mv = 1 amp.More amps Vs time, wave control turned all the way downAMPS @ 100 ipmDual trace, Volts on top, amps on bottom.Fluke Model 98.  100 Mhz.  Amp pick up is a hall effect pick up around the + cable going to the wire feeder.Last edited by David R; 02-11-2008 at 09:26 PM.Real world weldin.  When I grow up I want to be a tig weldor.
Reply:Thats all very interesting but is that all you have to do all day??Taking up a notch...David!...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Does this make me a geek?Real world weldin.  When I grow up I want to be a tig weldor.
Reply:Originally Posted by David RDoes this make me a geek?
Reply:yep...Me!
Reply:Yep, a geek with better toys than I've got. I can't really justify buying a scope just to look at the pretty shapes. Buying a plug-in power meter, on the other hand, is a real winner.
Reply:Geek or No Geek that is the best shot of a square wave I've seen yet.Thanks.I knew what was going on in that puddle but now it's much more clear and I can see where the occasional spatter be-be comes from.Thanks again.
Reply:Originally Posted by MozYep, a geek with better toys than I've got. I can't really justify buying a scope just to look at the pretty shapes. Buying a plug-in power meter, on the other hand, is a real winner.
Reply:David R,so exactly what pulsed MIG settings are on your machine?You set wire feed speed, volts, and "wave control"?  And wave form controls peak and background amps, and frequency?
Reply:First, when I bought the panel, I had no idea what I was getting into.  Never used pulsed spray before.  Tried true spray a few times, but didn't have much control and if everything wasn't exactly right, got porosity.   I do mostly repair work, some small production jobs.  In the instructions for the V350 were instructions (one page) for the advanced panel.  I read them over quite a few times.  Finally I did a big job and bought the panel.  To answer your question.  ONE knob on the machine that is the "output" knob. For stick or tig, it sets amps, for mig, it sets volts.  For pulsed Mig it sets wire speed.There is a "select" knob that picks the process.... For pulsed Mig, I have to select wire size if its steel, for aluminum, I have to select type of aluminum, 4043 or 5356, wire size and pulsed spray or "pulse on pulse" (it makes the dimes)  For stainless, I select wire size and gas type.  SO its a no brainer for me.  Steel, wire size and it says "argon blends" which can be argon + up to 15% Co2 or Argon + 2 to 5% o2.  Either one works on the same setting.Once the wire size is selected, All I do is set the wire speed with the "big knob" and match it with the speed on the feeder.  Its not exact but close.  Strike an arc and adjust the big knob (trim?) to get the proper arc length.  Usually for 98/2 its really close, for 92/8 I need to set the machine a little higher than the actual wire speed.  I guess its calibrated for 98/2.   Arc length varies by position I am welding, so a little tweaking is needed.  For example today I had the wire feeder set to 275 ipm and the welder set to 330 to get the proper arc length doing a fillet using 92/8.  When I was doing some overhead, the feeder was set at 225 and machine set at 230.  The arc was still plenty long, but it worked great.  There are times when the machine is set below the actual wire speed when using 98/2.....Confuse you yet?The other adjustment is wave control.  Down increases background current and decreases frequency.  Up is the opposite. You can see that in the wave forms I posted.It works like an arc force adjustment.  Turn it down and the arc is wider, bead is flatter.  If I turn the wave control way down, I have to turn the wire speed (trim?) on the welder UP or the arc is too short and hits the puddle.So basically there are 2 adjustments.  Turning the main knob up increases the "bumble Bee" sound (frequency) by a lot.  Turning the wave control knob up does the same thing but not near as much.  The instructions say fine tune the arc with the wave control.With 98/2 and wave control all the way up, its like a laser. Arc is narrow and deep penetrating.  With .045 wire, the arc is about the size of the wire.  With 92/8, arc is more of a cone, wider and softer.I have read a few things about the miller and its nothing like what I have.  If I understand it right, the miller can adjust back ground current separate from peak current.  I don't know if they can change frequency or not.I have found very little info on all of this.  Not even how much stick out I am supposed to use.  I know too little smokes tips and gas cones.  Contact tip has to be recessed about 3/16" or it gets melted.  I use one size tip bigger than the wire or the wire sticks in the tip when things get hot which is not long.  Today I had the gas cone glowing after about 20 minutes of continuous welding at 375 ipm of .035 wire.   The 200 amp lincoln gun was getting too hot to hang onto.  The wire started sticking in the .045 heavy duty contact tip.I did some overhead today and it was like spray painting.  NO spatter, no balls falling on me, just beads that looked like I did them flat.  .035 wire at 225 ipm.  I love it!I just re read your original question.  I cannot set volts.  It does it for me.  Simple like me DavidLast edited by David R; 02-12-2008 at 06:10 PM.Real world weldin.  When I grow up I want to be a tig weldor.
Reply:You need a "Geek Squad" sign on your truck now.
Reply:The politically correct term......  Electronics faggot.  DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:Originally Posted by David RThe politically correct term......  Electronics faggot.  David