low amp flux core welding

[ajohns900]

I have been tooling around with a 90 amp flux core welder. It plugs into a standard wall outlet and uses no shielding gas.

Supposedly it is rated to weld 3/16 in a single pass and possibly 1/4 in multiple passes. Can a low amp flux welder do this if the welder has the skill?

The machine booklet says it can use .035 and 030 wire. I was told that .035 would penetrate less than .030 flux wire due to the limited amps of such a machine. Is this true?

I have tried to see which size wire penetrates more or less with the same amp setting; HI or LOw, and can not tell.

Is it your experience to slow down the wire feed for deeper penetration and stay in the puddle longer and move slower?

I used this welder to make a storage rack out of 1/8 walled square tubing. It worked fine. I tried it on thicker metal (1/4 & 3/16) and could not tell if I was making a strong weld or not.

Thanks for your advice.