Hacking blu-ray drives for high-throughput 3D printing

Edwin En Te Hu*, Martin Voss, Tien Jen Chang, Hsien Shun Liao, Anja Boisen

*Corresponding author for this work

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

Abstract

Conventional microscale 3D printing techniques mostly rely on the raster scanning method, which needs constant changing of printer head/light beam/substrate directions to print a solid structure. Therefore, throughput is a longstanding bottleneck and it is more challenging to print microfeatures in large areas. This study demonstrates the possibility of 3D printing microfeatures on a fast-spinning disc. A Blu-ray drives based high-throughput 3D printer (BRIGHT3D) is developed to demonstrate the spin printing on disc concept and evaluate the highest linear printing speed. The BRIGHT3Dintegrates two Blu-ray drives that are synchronized by a customized controller. The printing substrate is a standard Blu-ray RW disc spun by a spindle motor. Both drives utilize the same optical pick-up unit (OPU), which equips a voice coil motor (VCM) for the disc wobbling compensation. The bottom OPU detects the disc wobbling and feeds the VCM control signal back to top OPU for maintaining laser (405 nm, 658 microwatts) focused on the spinning substrate disc. The BRIGHT3Dcan directly spin-coat (up to 6,440 rpm) commercial photopolymers with a controllable thickness on top of the substrate disc. The top OPU laser was switched with a frequency of 1∼500 kHz (duty cycle: 80 %) for the preliminary spinning 3D printing evaluation. Microfeatures can be cured by the BRIGHT3Dwhile the disc is spinning at a speed of 265 rpm, which has a linear speed from inner diameter, 20 mm, to the outer diameter, 58.5 mm, of 0.55∼1.63 meters per second. After removing the photopolymer residues by 75% ethanol, various microscale features on the disc can be seen and measured by scanning electron microscopy. Microscale lines (height/width: 1.43/8.25 microns) and dots (length: 5.97 microns) were successfully printed on the disc. The BRIGHT3Dis aiming for multiple layer printing on the disc to realize sophisticated features of high-throughput 3D printing in the near future.

Original languageEnglish
Title of host publicationLaser 3D Manufacturing VIII
Number of pages10
PublisherSPIE - International Society for Optical Engineering
Publication date2021
Article number116770A
DOIs
Publication statusPublished - 2021
EventLaser 3D Manufacturing VIII - Online
Duration: 6 Mar 202111 Mar 2021
Conference number: 8

Conference

ConferenceLaser 3D Manufacturing VIII
Number8
LocationOnline
Period06/03/202111/03/2021
SeriesProceedings of SPIE, the International Society for Optical Engineering
Volume11677
ISSN0277-786X

Keywords

  • 3D printing
  • Blu-ray
  • High throughput
  • Microscale
  • Stereolithography

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