Faculté des Sciences appliquées
Faculté des Sciences appliquées

Development of a multifunctional test bench and application in precise 3D SLA printing

Lebailly, Alexandre ULiège
Promotor(s) : Redouté, Jean-Michel ULiège
Date of defense : 26-Jun-2023/27-Jun-2023 • Permalink :
Title : Development of a multifunctional test bench and application in precise 3D SLA printing
Translated title : [fr] Développement d'un banc d'essai multifonctionnel et application à l'impression 3D SLA de précision
Author : Lebailly, Alexandre ULiège
Date of defense  : 26-Jun-2023/27-Jun-2023
Advisor(s) : Redouté, Jean-Michel ULiège
Committee's member(s) : Vanderbemden, Philippe ULiège
Gilet, Tristan ULiège
Language : English
Number of pages : 155
Keywords : [en] Embedded software
[en] Experimental characterization
[en] Motion control
[en] Precision 3D printing
[en] Stepper motor
[en] SLA printing
[en] Microcontroller
Discipline(s) : Engineering, computing & technology > Electrical & electronics engineering
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master : ingénieur civil électricien, à finalité spécialisée en "signal processing and intelligent robotics"
Faculty: Master thesis of the Faculté des Sciences appliquées


[en] 3D printing technologies have recently experienced significant growth in the public interest. This phenomenon mainly comes from the easiness and affordability that these kinds of technologies can offer nowadays. Current scientific research therefore focuses on developing printers that are cheaper, more precise, and easier to use. In this context, the Stereolithography printing technology (SLA) is rapidly evolving. The printing precision it offers indeed makes this printing technique one of the most promising technologies for the future.

In this thesis, the objective is to develop an SLA printer that challenges state-of-the-art commercial printers in terms of Z-axis precision. The printer is built on a multifunctional mechanical test bench that handles the printer's motion. This work starts by describing the SLA printing technique as well as the performances that can currently be obtained with commercial printers.

It then covers, in detail, the development of the multifunctional test bench. Such a test bench can be viewed as a precise one-dimensional motion device that includes several sensors. The device development is then followed by a complete characterization procedure. This characterization mainly focuses on finding theoretical test bench limits for SLA printing precision.

The goal of the work is to reach micrometric precisions in the printing process. To reach this objective, a precise feedback loop is then developed along with a motion controller. The theoretical properties of those different elements are also described.

The last part of the work is dedicated to the SLA printer. Its design is described and the different elements and constraints required for its working are detailed and explained. The inclusion of the printer into the test bench framework is also provided. The built printer performances are then studied, both in terms of motion and printing precisions.



Access TFE_3D_Printing_Lebailly_Alexandre.pdf
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Format: Adobe PDF
Access Abstract_en.pdf
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Access Steps_30microns_builtSLA.jpg
Description: Illustration of a 30µm step made with the built printer
Size: 503.67 kB
Format: JPEG
Access Measurement_step_5microns_builtSLA.JPG
Description: Step measurement of a 5µm layer printed with the built SLA printer
Size: 141.84 kB
Format: JPEG
Access Motion_precision_comparison.png
Description: Comparison of the motion precision histogram observed for a 30µm layer printing between a commercial printer, and the built printer both in open-loop and in closed-loop
Size: 52.34 kB
Format: image/png


  • Lebailly, Alexandre ULiège Université de Liège > Master ingé. civ. électr., à fin.


Committee's member(s)

  • Vanderbemden, Philippe ULiège Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
    ORBi View his publications on ORBi
  • Gilet, Tristan ULiège Université de Liège - ULiège > Département d'aérospatiale et mécanique > Microfluidique
    ORBi View his publications on ORBi
  • Total number of views 73
  • Total number of downloads 15

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