One of the core concepts in additive manufacturing is to have accurate powder deposition on bed
with uniform duration throughout the print job. The inaccuracy in job layer duration arising when
some layers take more or lesser than the recommended value, often results in bad part quality issue
or indicate issues with print hardware components.
This disclosure describes a method for improving Print Quality (PQ) and reduce unplanned
downtime (due to sub-system failure) by looking at layer time for the print cycles and figuring if
they are running off the prescribed limits for the material used. Based on this information the
erroneous machines can be inspected for diagnosing fault. Analysis by services and support (using
the information from the cases flagged using this technique) suggests the dominating cause to be
hard drive failures (replacing which solves the problem), though there can be other reasons as well.
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INC, HP, "IDENTIFY PRINT QUALITY OR SUB-SYSTEM DEGRADATION ISSUES FOR 3D PRINTERS USING LAYER TIME ANALYSIS", Technical Disclosure Commons, (December 23, 2019)