[Normsthename]

Hi
I have had my homebuilt Plasma up and running for a few days now, and I am trying to get to grips with all the different cutting parameters.
I have a Hypertherm 1000 with fresh Finecut consumables and it is using a Campbells THC300 Torch Height Controller.
I definitely have clean air, because by luck I did manage to produce a good cut once......but in my excitement I did'nt note the settings....DOH!

Two problems I am seeing a lot are 'Wavy' cuts and not great cut quality (See Pictures)
The material is 16swg 304 Stainless Steel.
I ran a load of test parts to find the best cutting parameters for the material as follows.

Internal Holes
40amp 47.25" (1200mm) per min at a cut height of 0.25mm

Outside Profile
40amp 138" (3500mm) per min at a cut height of 0.25mm

I am using a homebuilt Water Table, and have the water about 1/2" below the surface of the material.

Would cutting with Nitrogen improve the cut quality, and if so by how much?

Any ideas would be much appreciated.

Thanks

Andy