Comparison of accuracy and precision of various types of photo-curing printing technology

Abstract

Light-cured 3D printing technology has always had a series of advantages such as high precision, fast forming speed and low cost compared with other printing technologies. Since the invention of Stereo lithography Appearance(SLA) printing technology in 1986, light-cured 3D printing has been developing rapidly, and has been derived into Digital Light Processing (DLP), Laser cladding deposition (LCD), Continuous Liquid Interface Production (CLIP), etc. Object: The roughness of the printed products of various photocurable printers was evaluated by the surface morphology of the printed products on the micro level, Compared with the original digital file model, the dimensional accuracy of printed products of various types of photo-curing printers is evaluated. Materials and Methods: A digital 3D model was obtained by scanning the adult maxillary teeth with a 3shape mouth scanner. Save the upper digital three-dimensional model as an STL file and print it as a physical model using three different 3D printers(UNIZ (LCD), Han’s laser SLA 6000 (SLA) and Han’s laser DLP (DLP)). Again, use 3shape to scan the physical model into a 3D digital model and use the Dental Cad to compare the accuracy. Test blocks (20mm*10mm*5mm) were printed using three different printers, and the surface topography was observed using a KEYENCE optical microscope, and data comparison was performed using DANTAL CAD for file fitting. Results and Conclusion: On the Z direction, the surface bump SLA was 185.1 micron mum, the LCD 105.4 mum, and the DLP 95.2 mum. SLA<LCD<DLP. The model fit DLP was 0.07 mm, the LCD was 0.10 mm, and the SLA was 0.14 mm. In terms of print accuracy, DLP > LCD > SLA. The surface roughness of the test block was DLP>SLA>LCD. Conclusion: DLP performs well in all aspects.

Stereochemistry-Controlled Mechanical Properties and Degradation in 3D-Printable Photosets

“…2 While there is an ever-increasing variety of techniques available, digital light processing (DLP)-based photochemical printing stands apart in performance by offering micron-scale resolution as well as unprecedented accuracy and speed. 3,4 Until recently, photocurable resins that are suitable for DLP largely produced brittle materials, thus limiting the potential applications of the technology. 5,6 However, advances in photochemical methodology (thiol−ene, 7,8 addition−fragmentation chain transfer, 9,10 dual cure network 11 ) and the enhancement of formulations with additives (siloxanes, 12 aliphatic chains, 13 and inorganic fillers 14 ) have contributed to the development of resins that result in materials with improved toughness and ductility.…”

“…As such, it finds applications ranging from consumer products to medical devices . While there is an ever-increasing variety of techniques available, digital light processing (DLP)-based photochemical printing stands apart in performance by offering micron-scale resolution as well as unprecedented accuracy and speed. , Until recently, photocurable resins that are suitable for DLP largely produced brittle materials, thus limiting the potential applications of the technology. , However, advances in photochemical methodology (thiol–ene, , addition–fragmentation chain transfer, , dual cure network) and the enhancement of formulations with additives (siloxanes, aliphatic chains, and inorganic fillers) have contributed to the development of resins that result in materials with improved toughness and ductility. , Modifying the mechanical properties within photosets, however, commonly requires significant changes to the chemical structure of the network (e.g., monomer/oligomer substitution) or its cross-linking density, which inevitably result in altering the printability of the resin without a further adjustment of either the formulation, the printing parameters, or the equipment. , …”

Specific energy absorption during compression testing of ABS and FPU parts fabricated using LCD-SLA based 3D printer

“…Saini et al (2020) experimented with different part build orientations and found that samples printed with angles 22.5°, 67.5°, 0° and 67.5°, 0° have the highest tensile, compressive, fatigue, flexural and impact strength, respectively. Yao et al (2020), in their study, compared three different AM processes based on photopolymerization, that is, SLA, DLP and LCD. They concluded that SLA < LCD < DLP in terms of surface bump, DLP > LCD > SLA in terms of print accuracy and DLP > SLA > LCD based on surface roughness.…”

User friendly haptic tool for soccer fans with vision disabilities: Design and proof of concept

“…Late advances in precision modeling enable the design and manufacture of physical haptic structures capable of translating and rendering visual representations to non-visual representations (Tobitani et al, 2021;Yao et al, 2020;Milos, Vujčić & Majnarić, 2021). Regarding the latter, in (Mc Gee et al, 2000) the authors identified possible effective combinations of haptic and live auditory textural information that exploit the sense of touch (haptic), the feeling of motion (kinesthetic) and the received force-feedback from the mechanical production of information sensed by the kinesthetic system, and the sense of pressure, temperature and Emmanuel Maravelakis ¹ Antonios Konstantaras ¹ Panagiotis Kyratsis ² Nikolaos Bolanakis ¹ Nectarios Vidakis ³ Markos Petousis ³ Katerina Kabassi ⁴ pain felt by the skin (either cutaneous or tactile when focused upon pressure solely).…”