In ‘Comparative Study and Measurement of Form Errors for the Component Printed by FDM and PolyJet Process,’ authors Nagendra Kumar Maurya, Vikas Rastogi, and Pushpendra Singh (all researchers from India) explore the differences between FDM 3D printing and polyjet 3D printing—for the purposes of rapid prototyping.
“CATIA-V6 was used for the 3D modeling and a coordinate measuring machine (CMM) was employed for the measurements of dimensions. Optical profilometer was considered to measure the surface roughness of component. ISO UNI EN 20286-I (1995) and DIN 16901 standards was used for the evaluating IT grades for each selected dimension,” explained the researchers.
A sample automotive connecting rod was created on all the printers to compare and evaluate:
- Dimensional accuracy
- Form error
- Surface roughness
- Cost analysis
- Tolerance grade (of automotive parts)
The researchers used four different types of dimensions during their comparative analysis:
- Linear dimension in X-Y plane
- Linear dimension Y-Z plane
- Radial dimension
- Circular dimension
The researchers clearly observed better performance via polyjet printing on the Objet30, especially in dimensional accuracy; this was the exception however, as FDM parts printed along the Y-Z plane offered better form. They also noted an issue with dimensions overall, as they were smaller than that of the CAD model in almost all cases. This discrepancy was attributed to shrinkage during the fabrication process—and more so in FDM printing rather than polyjet (due to ‘air gapes’). Polyjet 3D printing was found to cause greater dimensions across the Y-Z plane, however, as a base is formed on the platform.
Experimental results also showed parts created via polyjet technology had ‘superior surface quality.’ In comparison, FDM components exhibited greater surface irregularity.
Other major findings showed:
- Objet30 has minimum percentage error along the XY plane
- MakerBot had minimum percentage error along the YZ plane.
- Polyjet parts showed minimum form error.
- Total cost prototype generated through Objet 30 was very high as compared to Ultimaker and MakerBot.
“Total cost of prototype generated by different 3D printers was calculated based on cost of build material, cost of support material, labor cost and machine cost. The results of measurement show that quality of prototype fabricated by Objet30 is better than Ultimaker and MakerBot. Form error and surface roughness of objet30 printer was good enough to produce industrial grade prototype,” explained the researchers. “The novel contribution of this work lies in the fact that no such studies were conducted using complex shape geometry in the archival literature.”
Comparisons in technique are important as users today are engaged in so many different 3D printing research studies, as well as innovating for automation and design, industrial manufacturing, and of course—creating new items that may not have ever been possible before with the use of conventional technology.
What do you think of this news? Let us know your thoughts! Join the discussion of this and other 3D printing topics at 3DPrintBoard.com.[Source / Income: ‘Comparative Study and Measurement of Form Errors for the Component Printed by FDM and PolyJet Process’]
You May Also Like
3D Printing Service Hubs Appoints New CEO, Alex Cappy
Changes are taking place at Hubs since it was acquired by manufacturing service provider Protolabs (Nasdaq: PRLB). Not only has the subsidiary removed the “3D” from its name, but it...
New High-Density Stacking Redefines AM Plastics Productivity
Additive manufacturing (AM) is evolving beyond prototyping to enable end-use parts production across a range of applications. Much has changed to enable this, including the development of AM processes and...
AM Investment Strategies: CEOs, Analysts & Finance Experts Share Wealth of Knowledge with 3D Printing Community
Representatives from some of the industry’s most successful 3D printing businesses joined the SmarTech – Stifel AM Investment Strategies 2021 virtual summit on September 9, 2021, to talk about the...
U.S. 3D Printing Experience Center Opened by Massivit 3D
Israel-based company Massivit 3D (MSVT.TA), a leader in large-scale 3D printing systems, has announced the opening of their Americas Experience Center in Atlanta, Georgia. The center will be open to...
View our broad assortment of in house and third party products.