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In 3D printers, the Powder fusion process occurs in a sealed environment called print chamber,

that is kept at negative pressure (relative to client room); the print chamber is sealed not only to

prevent undesired contamination of the client room, but also to avoid unwanted air leaks from

the client room (or by other zone of the 3D printer itself) to the print chamber. In fact, these air

leaks may cause unwanted airflows in the printing area: they cool down only a specific zone of

the printable area, changing the energy balance in this region and therefore affecting Part


A difference in printer air leaks worsens the printer-to-printer repeatability, which is crucial for

customers. Also, since these leaks are not controlled, it implies a poor job to job repeatability.

Hence, detecting the air leaks is crucial to ensure robust and repeatable PQ across printers. In

this disclosure we show a process to detect the Air leaks and give the customer or HP Service

engineer recommendations on how to solve them.

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Creative Commons License
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