Potential errors affecting accuracy include cutter compensation error, programming error and machine motion.
Cutter compensation is the value entered into the control system to take into account the width of cut from the jet — that is, the amount by which the cut path must be enlarged so the final part comes out the proper size. To avoid potential errors in high-precision work, the operator should conduct test cuts and know the frequency at which cutter compensation must be adjusted to match mixing tube wear.
Programming errors arise most often because some XY controls do not show dimensions on part programs, making lack of dimensional matching between the part program and the CAD drawing difficult to detect. Important aspects of machine motion that can introduce errors are backlash in the mechanical unit and repeatability.