#Fastcut cnc software free#

Positive cut surface – positive and negative bevel on the same piece. Irregular bevel (concave and convex cut, surface shown on a cut away) Usually a consistent negative bevel around the part is accompanied by low speed dross. These parameters cause the arc to remove more material at the bottom of the plate. This problem can be caused by low torch standoff (arc voltage), excessive amperage, or low speed. Negative bevel (bottom of part, smaller than top, undercutting)

A part with excessive positive bevel all around it may also have a hard bead of high-speed dross at its bottom edge. Improper cut direction around the part may also cause excessive positive bevel angle. As a result, the kerf is wide at the top and narrow at the bottom. All of these variables cause the arc to lag which causes more energy to contact the top of the kerf than the bottom. This problem may be caused by a worn nozzle, high torch standoff (arc voltage), inadequate amperage, or excessive speed. Positive bevel (top of part, smaller than bottom) Here are some pictures of bevel problems and what causes them. Typical bevel for air plasma is 1 to 3 degrees, this is normal and accepted for the process. Westcott Plasma Table Cut Quality Lets Talk Bevel Out of Square – If your gantry or machine is not square your resulting parts will not be square.This will affect cut quality, especially at higher speeds and detailed work with quick motion changes. Vibration – Even if your torch is perfect, you can still have problems is there is vibration, or play, in your machine.Doing tests with a stop watch and tape measure can ensure that your machine is actually moving at the speed it says it is. Proper cutting speed – Making sure that you are following the proper specs and that your machine is accurately carrying out that move.Torch Square – Ensuring that the torch itself is perfectly square to the work surface will decrease the chance of having bevel on your cuts.

Nozzle hole is round and not out of round and no debris is on the nozzle or swirl ring.

Consumables – Making sure your consumables and torch components are clean and within spec.

On an outside cut the torch, should move clockwise and on inside cuts (holes) it should move counter clockwise. The squarest cut angles are always on the right side, with respect to the torch and its movement.

Torch Height – Both for pierce and cut, ensuring that the machine maintains the correct height at all times is critical.

It affects cut quality and consumable life.

#Fastcut cnc software free#

Air Quality – Having clean, dry, oil free air is a must.

For specific information on consumables check the consumables tips and tricks page. Achieving the best possible cut quality is always the goal, understanding what factors contribute and being able to identify and correct the problems is the skill you need to master.