Guest Anonymous Posted January 8, 2003 Share Posted January 8, 2003 Hi, I just recently got a deal on a Lincoln SP100 mig welder. I've been practicing with it for about a week now and was wondering what should I set my shielding gas pressure at? Any answer or comment would be greatly appreciated. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
johnc Posted January 8, 2003 Share Posted January 8, 2003 30 psi. EDIT: Coffey you dummy, 30 CFH! Quote Link to comment Share on other sites More sharing options...
Guycali Posted January 8, 2003 Share Posted January 8, 2003 If using a flow meter, open the valve fully and set the bottom of the ball bearing at the 15CFH mark so the top of the ball is at 20CFH. That should be sufficient for most type of welding. Any higher CFH is wasteful. HTH, -Guycali Quote Link to comment Share on other sites More sharing options...
yo2001 Posted January 8, 2003 Share Posted January 8, 2003 I was also told to keep it kind of low or the weld will cool down too fast. Quote Link to comment Share on other sites More sharing options...
Guest JAMIE T Posted January 8, 2003 Share Posted January 8, 2003 Actually gas pressure depends on the conditions you are welding in. For instance, if you are welding outside, there may be a breeze, you will need more pressure to insure suffecient sheild properties. At work I have my flowmeter set to about 40psi. I'm welding aluminum though, and it helps with clean out. I can make MIG welded aluminum look like TIG welds. Then again, I can make TIG welds look like a stack of dimes. Quote Link to comment Share on other sites More sharing options...
Mike C Posted January 9, 2003 Share Posted January 9, 2003 My regulator is not adjustable for pressure, only for flow. 15 CFH should be sufficient indoor, but in windy conditions you may have to bump it up a LOT. I use 25 CFH working outdoors in the calm/slight breeze. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted January 9, 2003 Share Posted January 9, 2003 Hey thanks for all the info everyone. Now I have another problem. My current pressure is set at about 45 psi and for some reason I cannot make it go any lower than that. I can raise the psi however. Is there something wrong with my regulator or is it just me? Quote Link to comment Share on other sites More sharing options...
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