Converting SP135+ numbers

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I have the Lincoln SP 135+ and several of the welding guides give guidelines in volts and amps while the SP135 is letters and numbers.  Is there a conversion chart somehwere?Also, where is a good place to by the Lincoln wires like Blue max etc.  All I can find is large spools? or boxes of 20 2lb rolls, when I just need 1 or 2 rolls.
Reply:Any thoughts on the conversion?Any ideas on where to buy?
Reply:conversion chart ? for what?ChuckASME Pressure Vessel welder
Reply:he is talking about a conversion chart that converts the letter designation on the SP135+ from the letter settings (a-j) to amps (25a-135a). it seems pretty obvious that the letter a=25, and j=135. however the other 8 settings are less than obvious. it seems to me that roughly*12 amps per setting after "A" would make sense....a=25 +12b=37 +12c=49 +12d=61 +12e=73 +12f=85 +12g=97 +12h=109 +12i=121 +12j=133 ...or so it would seem. as i have the same machine id like an official answer as well.
Reply:Originally Posted by DaddySSI have the Lincoln SP 135+ and several of the welding guides give guidelines in volts and amps while the SP135 is letters and numbers.  Is there a conversion chart somehwere?Also, where is a good place to by the Lincoln wires like Blue max etc.  All I can find is large spools? or boxes of 20 2lb rolls, when I just need 1 or 2 rolls.
Reply:I tried to get ya some help with the conversion also but no help there.  I even tried the actual Lincoln site (I am sure you already tried that but figured wouldn't hurt) and they emailed back saying " We dont have a chart"     go figure I guess its  "top secret"Sorry but hope the wire links helps anyway.
Reply:oh ok i dont use them i adjust my sp by how  the bead looks and sounds sry i cant helpChuckASME Pressure Vessel welder
Reply:Thanks all, I appreciate the responses and help.
Reply:Well there might be something that could be worked up but it would have to be so broad that it wouldn't be of a lot of use. There are just too many variables.  The adjustment you're looking at adjusts the feed in inches per minute, the wire consumes x amount of amperage at that feed rate assuming the voltage is set correctly.  You would have to consider the wire size as well as wire type and create a chart for each one to be very specific for any given set-up. There are some charts out there that try to give approximate current ranges for generic wires and sizes at given speeds. So if set at (for fun) "D" on the wire speed and some proper voltage the current would be different for .025, .030, .035 and solid vs flux core all at that same setting.