Chamber Heat Calibration by Emissivity Measurements in an Open Source SLS System

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


The goal of this research is to determine the thermal stability of the powder cake produced during the Selective Laser Sintering process. This will be used for process optimisation and verification on a purpose-built Open Architecture Polymer laser powder-bed fusion (L-PBF) system developed at the Technical University of Denmark (DTU). Furthermore, the emissivity of PA11 powder is determined throughout the heating cycle, studying the true temperature readout by means of an infrared (IR) camera (Camera Model – Optris XI400), which is present for process control during build jobs.

The paper presents two experiments. One is focussing on finding the temperature stable build envelope in the build chamber. This is done by using K-type sensors placed in the powder while heating and cooling the powder cake. And a second experiment is to determine the influence of powder temperature on emissivity, used for non-contact temperature readings done by infrared measurements. This will be used for calibrating the temperature readings with the actual temperature.
Original languageEnglish
Title of host publication2022 ASPE and euspen Summer Topical Meeting on Advancing Precision in Additive Manufacturing
PublisherAmerican Society for Precision Engineering
Publication date2022
Pages180 - 185
ISBN (Electronic)978-171385919-2
Publication statusPublished - 2022
Event2022 Summer Topical Meeting : Advancing Precision in Additive Manufacturing - University of Tennessee, Knoxville, United States
Duration: 11 Jul 202214 Jul 2022


Conference2022 Summer Topical Meeting
LocationUniversity of Tennessee
Country/TerritoryUnited States


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