Here are issues that can cause severely beveled cuts with a plasma torch:
1. Torch not perpendicular to the plate.
2. Incorrect combination of consumable parts (refer to the operators manual)
3. Damaged shield or nozzle. center orifice of these consumables needs to be perfectly round....with no nicks. Damage is ussually caused by pierce too thick...or too close to the material being cut. Refer to the detailed cut paramter charts in the operators manual.
4. Incorrect air pressure or moisture/oil in the air system.
5. Incorrect pierce height and/or cut height.
6. Damaged or worn torch retaining cap, swirl ring or torch body.
If you can provide more details on how you are cutting (hand cutting? Machine cutting?) and what equipment you are using (CNC machine? Height control?) as well as the material thickness and power level (amperage) I can steer you in the right direction. Pictures of the cuts, the used nozzle (closeup of orifice) and description of the bevel (is it uniform around the cut or does it vary from positive to negative angularity around the cut?) will help as well.
Jim Colt Hypertherm