Steel frame cnc router design/build

[JAZZCNC]

Thanks kingcreaky - i've spotted a Ferm 100A unit on ebay that comes with basic accessories that looks like it should be enough to get me started.

No Don't buy 100A welder you need more Amp's spare for duty cycle. Biggest problem with cheap Arc welders is low Duty cycle or better put the time you can weld before the it trips out from over heating is short.!!
Now your not going to be running long welds or in a rush so it wouldn't probably be a major problem but for £10-20 more you could get 140-160A and have decent duty cycle with less stress on welder.

Like Matt says 6013 rods but more important is ONLY buy decent quality IE: branded name BOC, MUREX etc none of this rubbish you see at Aldi or car boot sale etc and keep very dry.

Regards 6013 it's the AWS standard (American Welding society). Rods usually have prefix like E-6013 and it breaks down like this.!!
E= Suitable for MMA welding and flux coated
60= Minimum tensile strength in KSI(Kilo-pounds(force) square inch) IE 60Ksi = 60,000psi pounds(force) per square inch.
1= Suitability for welding positions . . . IE: 1= All positions 2= flat & horizontal positions
3= Flux coating type and suitable Current types IE: 3= High titania potassium (Rutile) AC or DC+ current.

See here for a good Arc tutorial and loads of info.
Arc Welding Tutorial

I'll look at frame and come back to ya.!!. . . . Get ya hard hat on ready. . .Lol