Dang plasma cutter glued my steel art together.

You could try a little oil on the plates and see if that keeps them from welding.

Steve

Blueraven wrote:

Never thought of stacking - I have a CNC table so I expand sideways.

Plasma always produces melted metal slag on the edge. Since it is so hot you can see.

Normally the junk is attached by a thin layer and a blob of various thickness under. Try different speed of cut and different currents.

You will never get away from it - but you can limit the amount.

Martin Martin Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net NRA LOH, NRA Life NRA Second Amendment Task Force Charter Founder

Blueraven wrote:

I tried welding splatter preventer - Plasma is so hot it vaporizes it. No matter what happens the edges will be melted together but maybe just a little. The bottom one has the blob.

Sometimes I was able to take a lineman pliers and twist it off - looking at the bottom and gripping from the bottom face to the outside. If you can start a spot then it might just twist off.

Never a free lunch - I got a 1" belt sander and a BOSS from Delta they help a lot.

Martin Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net NRA LOH, NRA Life NRA Second Amendment Task Force Charter Founder

Steve Smith wrote:

hello

What I have done in the past was to stand the stacked plates on edge, one plate off the edge of the work bench. Give a good tap with a hammer and the sheets should seperate easily.

The sheets are being held together with a thin layer of oxidized metal that will break relatively easy compared to a actual weld. Stack cutting with a gap is not going to help with the quality of cut for the lower sheets.

The addition of 1-2% hydrogen to the cutting gas can reduce or eliminate the oxide layer on the kerf, I know this works with stainless but have never tried it with mild steel; not an option if your only running compressed air. Don't remove the water trap from your airline to get some hydrogen; your plasma cutter would not be too impressed.

John