TEST PATTERN AND ALIGNMENT METHOD FOR 3D PRINTERS

The invention relates to apparatus and methods for producing three- dimensional objects through building of successive layers printed by eg inkjet printheads. For aligning the printheads a test pattern (129) is used, made up of alternating reference lines (135) and test lines (136), both parallel an...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	HERNANDEZ, ANDRES, TOMAS, ZENGERLE, III, WALTER, H, KINSLEY, JOSHUA, P, FIENUP, WILLIAM, JAMES, BERLIN, ANDREW, A
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PRINTING SELECTIVE PRINTING MECHANISMS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STAMPS TRANSPORTING TYPEWRITERS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The invention relates to apparatus and methods for producing three- dimensional objects through building of successive layers printed by eg inkjet printheads. For aligning the printheads a test pattern (129) is used, made up of alternating reference lines (135) and test lines (136), both parallel and perpendicular to a fast-axis travel, the testlines comprising test bars (191) incrementally displaces around a central test bar. Cleaning of the printheads is also provided. The test pattern (129) is read by alignment sensor system (132) and analysed with a Fast Fourier Transform (FFT).