Fused Deposition Modelling (FDM) has emerged as a versatile and cost-effective
3D printing technology. However, achieving intricate designs often necessitates
the use of supports. These structures provide stability during printing, preventing
deformities and ensuring the fidelity of complex geometries. Let's delve into the
types of supports and the techniques for their efficient removal in FDM printing.
Types of Supports
1. Normal Supports: These are the conventional supports generated by slicing
software, usually consisting of columns or grids. They are attached to
overhanging features of the model to maintain structural integrity during printing.
Normal supports are easy to generate but may leave marks on the finished
surface, requiring post-processing.
2. Tree Supports: Tree supports are a more advanced form, resembling branching
structures akin to tree roots. They offer better support distribution, reducing
contact points with the model and minimising surface blemishes. Tree supports
are particularly useful for delicate or intricate designs, as they decrease material
usage and facilitate easier removal.
Support Removal Techniques
1. Manual Removal: For normal supports, manual removal using pliers, tweezers,
or specialised tools is common. Care must be taken to avoid damaging the
model. Tree supports are designed for easier manual removal due to their less
intrusive nature.
2. Dissolvable Supports: Some filaments, like PVA (Polyvinyl Alcohol), can be
dissolved in water, offering a convenient support removal solution for complex
geometries. After printing, the model is submerged in water, dissolving the
supports without affecting the main structure. However, this method requires
additional equipment and may not be compatible with all materials.
3. Heat and Solvent Treatments: Heat guns or hot air blowers can soften
supports, making them easier to remove manually. Similarly, chemical solvents
can dissolve supports without damaging the model. Caution should be exercised
with solvent use to avoid compromising the structural integrity of the print.
In conclusion, supports play a crucial role in achieving high-quality prints with FDM
technology. By understanding the different types of supports and employing
appropriate removal techniques, users can optimize their printing processes,
minimizing post-processing efforts and ensuring superior final results.
Supports are essential for achieving high-quality prints with FDM 3D printing, providing stability and ensuring the fidelity of intricate designs. Normal supports and tree supports each have unique benefits, with tree supports offering reduced contact points and easier removal. Effective support removal techniques include manual removal, dissolvable supports, and heat or solvent treatments. By selecting the appropriate support type and removal method, users can optimize their printing processes.
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