31 Ga. Corrugated Metal and Scoop Shovel

S

stauth

Member
I thought I had a pretty good understanding of my machine till I tried to cut some designs on 31 ga. corrugated barn tin and a design on a old scoop shovel. I have played around with all kinds of pierce heights, cut heights, amps, feed rates, etc. It just pierces my tin and breaks off my torch on the shovel. Anyone tried either of these and had any success? I couldn't find anything that gave parameters on youtube or google that I could make work. Any hints or settings would be appreciated. Thanks, Mark
 
There is an inherent delay in the AVHC before it starts to sense the material defined by Distance to Corner found under Machine Settings, or if you have older generation AVHC the value can be adjusted for Sensing Delay under Setup Menu. This is to allow the arc voltage to stabilize before adjusting for arc voltage. Both values default at .5 inches, meaning it will move 1/2 inch before adjusting for material, obviously cutting corrugated during that distance it could run into the material. So you have to adjust your lead-in positions to accommodate. You could probably cut 31 ga with a pair of scissors, you would want to drop the amps as much as possible as well as reduce the pierce delay, otherwise it will blow out the material and lose the arc.
 
Worked like a champ. Changed the pierce delay from .10 to .05 and made my material thickness .009 and amps down to 20. I also made feedrate 55%. I put a piece of 20 gauge under it and that made it think it was making contact the whole time. Barely etched that metal, so it will work for another project. Now onto the scoop shovel. Thanks again for the tips.
 
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