Short answer
When designing for large-scale LMD, consider the trade-off between the flexibility and lower cost of articulated robots versus the higher accuracy and standardization of CNC gantries, as geometric outcomes can be comparable.
- Field
- Modelling
- Source
- Applied Sciences (2023)
- Method
- Comparative experimental study
- Evidence
- Strong effect
For fabricating large-scale metal components via Laser Metal Deposition (LMD), the choice between an eight-axis articulated robot and a five-axis CNC gantry machine depends on prioritizing flexibility and cost (robot) versus accuracy and standardization (gantry), as both can achieve comparable geometric outcomes. This modelling research insight is drawn from a 2023 study published in Applied Sciences. Using Comparative experimental study, researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing for large-scale LMD, consider the trade-off between the flexibility and lower cost of articulated robots versus the higher accuracy and standardization of CNC gantries, as geometric outcomes can be comparable.
Eight-Axis Robot vs. Five-Axis Gantry for Large-Scale Additive Manufacturing: Accuracy vs. Flexibility Trade-offs
For fabricating large-scale metal components via Laser Metal Deposition (LMD), the choice between an eight-axis articulated robot and a five-axis CNC gantry machine depends on prioritizing flexibility and cost (robot) versus accuracy and standardization (gantry), as both can achieve comparable geometric outcomes.
Applied Sciences · 2023
Key Findings
- 01No significant geometric differences were observed between components fabricated by the eight-axis robot and the five-axis CNC gantry.
- 02The inherent accuracy differences between the two motion systems did not impact the final component geometry in this LMD application.
- 03Both systems are capable of consistently producing large-scale axisymmetric metal components.
Application
Design takeaway
When designing for large-scale LMD, consider the trade-off between the flexibility and lower cost of articulated robots versus the higher accuracy and standardization of CNC gantries, as geometric outcomes can be comparable.
How to apply
When specifying equipment for a large-scale additive manufacturing project, evaluate whether the project demands the precision of a CNC gantry or the adaptability of an articulated robot, considering that the final part quality might be similar.
Project actions
- 01When choosing a manufacturing method for your design, consider the trade-offs between different machine types.
- 02Document why you chose a particular machine based on its capabilities and your project's needs.
Method & Evidence
Variables
Strengths & Limitations
Strengths
- +Direct comparison of two distinct motion systems for a relevant industrial application.
- +Use of identical process parameters across both machines for a fair comparison.
Limitations
The study used a specific type of metal and component; your project might involve different materials or shapes, which could lead to different results.
Reliability & validity
The study's validity is supported by the direct comparison of two distinct systems under controlled parameters. Reliability could be enhanced by repeating the fabrication process multiple times for each machine to assess consistency.
Think critically
To what extent would the findings of this study change if the component geometry was significantly more complex or if a different additive manufacturing process was used?
Design Principles
"Motion system selection in additive manufacturing should align with project-specific priorities of cost, flexibility, accuracy, and standardization."
This research highlights a critical decision point in additive manufacturing for large components. Designers and engineers must weigh the inherent trade-offs between different motion systems to select the most appropriate technology for their specific application context, balancing production goals with resource constraints.
What This Means for Your Design
When you need to 3D print big metal parts, you can use either a flexible robot arm or a more precise CNC machine. This study found that even though the machines are different, the final parts turn out looking almost the same.
How to use in your project
- 1.Reference this study when justifying the selection of a specific additive manufacturing machine for your design project, highlighting the comparison between different motion systems.
Add to My Project
Quick Cite
Paragraph starter
The selection of manufacturing equipment for large-scale additive manufacturing involves a trade-off between machine flexibility and accuracy. Research by Maffia et al. (2023) demonstrated that for Laser Metal Deposition of large axisymmetric components, an eight-axis articulated robot offered greater flexibility and lower cost, while a five-axis CNC gantry provided higher accuracy and standardization. Crucially, both systems yielded comparable geometric outcomes, suggesting that for this specific application, the choice can be guided by project priorities rather than a strict requirement for higher machine accuracy.
Source
Applied Sciences
Comparison between Eight-Axis Articulated Robot and Five-Axis CNC Gantry Laser Metal Deposition Machines for Fabricating Large Components
journal · 2023
View sourceQuestions About This Research
- What does the research say about eight-axis robot vs. five-axis gantry for large-scale additive manufacturing: accuracy vs. flexibility trade-offs?
- When designing for large-scale LMD, consider the trade-off between the flexibility and lower cost of articulated robots versus the higher accuracy and standardization of CNC gantries, as geometric outcomes can be comparable. Evidence: Applied Sciences (2023).
- Why does "Eight-Axis Robot vs. Five-Axis Gantry for Large-Scale Additive Manufacturing: Accuracy vs. Flexibility Trade-offs" matter for design?
- This research highlights a critical decision point in additive manufacturing for large components. Designers and engineers must weigh the inherent trade-offs between different motion systems to select the most appropriate technology for their specific application context, balancing production goals with resource constraints.
- How can designers apply this research?
- When designing for large-scale LMD, consider the trade-off between the flexibility and lower cost of articulated robots versus the higher accuracy and standardization of CNC gantries, as geometric outcomes can be comparable.
- What were the main findings?
- No significant geometric differences were observed between components fabricated by the eight-axis robot and the five-axis CNC gantry.. The inherent accuracy differences between the two motion systems did not impact the final component geometry in this LMD application.. Both systems are capable of consistently producing large-scale axisymmetric metal components.
- What research method was used?
- Comparative experimental study.
- How strong is the evidence?
- Evidence strength is rated Strong effect, based on a 2023 journal from Applied Sciences.
- What should I do differently in my next project?
- When specifying equipment for a large-scale additive manufacturing project, evaluate whether the project demands the precision of a CNC gantry or the adaptability of an articulated robot, considering that the final part quality might be similar.
- What are the limitations?
- The study focused on a specific type of component (axisymmetric gas turbine part) and LMD process, so results may vary for different geometries or AM techniques. The comparison was based on a single set of process parameters.