Torch catches on slag of pierce

My torch upon pierce blows out a bit of steel and then it will catch on that slag when it comes to cut height and sometimes moves the material thus throwing the cut off any suggestions would be great

Set the torch higher if possible, and you do have to clean that on every cut when dealing with thick material.
Also tour torch is not perpendicular to the material so you get that slag on one side only.

I will check that on being perpendicular and where would I set it higher at the pierce height? I did not realize I needed to clean it on cuts. thanks tommylight. I appreciate the input.

You will have to do some experimenting as setting the torch to high will mess up the cut quality or miss fire at start. The reality remains that you have to clean that slag after every pierce on thicker material.
Usually up to 10mm thick it poses no problem, beyond that to much slag will accumulate on every pierce.
That is easy to get rid off, just a light tap with a piece of metal or screw driver will remove it.

(I know nothing about plasma cutting so take my ideas with a grain of salt.)
That doesn't really help him solve his problem (the torch snagging on the slag and moving the piece.
And from the photo the problem isn't that the slag build-up snags on the torch at the start of the cut, but at the end.
From the sound of it the slag will always be a problem, so it would seem to me that the solution to the real problem is to use a lead in move so that the pierce point (and the slag build up) are off of the piece and out of the way of the torch when it comes around and finishes the cut.

It is at the beginning of the cut that it snags on the piece