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A Word About "Accuracy"

Positioning accuracy

The accuracy of the XY-motion over a specific range:

• Static measured with nozzle stopped
• Dynamic measured with nozzle in motion

Part accuracy

The overall accuracy of the finished part can be affected by:

• Dynamic positioning accuracy
• Relative motion between the X-Y axis assembly and the material support table
• Relative motion between the material support table and the material being cut
• Cutting tool offset value input by operator
• Effect of cutting speed variation on width of cut (kerf)
• Cut Quality and Machinability Index selected by operator
• Taper caused by nozzle condition and/or nozzle standoff and/or cutting speed
• Z-Axis non-perpendicularity

Repeatability

The consistency of the XY-motion

Part Repeatability

The consistency among parts. Affected by:

• XY-motion repeatability
• Relative motion between the XY-axis assembly and the material support table
• Relative motion between the material support table and the material being cut
• Jet growth caused by nozzle wear
• Change in taper caused by nozzle wear or changing standoff