A word about "accuracy"Positioning accuracy
The accuracy of the X-Y 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. 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 X-Y motion.
Part Repeatability
The consistency among parts. Affected by:
- X-Y motion repeatability.
- 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.
- Jet growth caused by nozzle wear.
- Change in taper caused by nozzle wear or changing standoff.
