Comprendre when to use supports in impression 3D, what they do, et comment they actually work can be a challenge for nombreux beginning hobbyists. There sont a number of different technical terms to découvrez, et then, of course, le impact on le globale result itself to consider. So ce article aims to help vous understand what vous devez to saurez, in order to use structures de support correctly.
Qu’est-ce que Are impression 3D Supports?
Le basic idea behind impression 3D support types est, as le name suggests, to help support le modèle 3D. Ce can be an important step while le modèle est being imprimé, as some designs might not be at their maximum résistance before they sont terminé, or they can have overhanging pièces, bridges, or complex geometries that devez to be kept in place pendant impression.
In general, impression 3D supports sont added to le main modèle itself via le impression 3D slicer, or sometimes baked dans le actual modèle 3D itself, in such a way that it becomes possible to easily remove le supports once le print est complete. Le supports can take nombreux different shapes, but all sont designed to keep le modèle from collapsing or creating unwanted results pendant impression.
Pourquoi et Quand Do We Need impression 3D Supports?
Pourquoi et when supports sont necessary va depend on a few different factors. Typically, any sort of overhangs, bridges, islands or deep holes in le modèle 3D can indicate a devez for supports. Since le printer builds one layer at a time, certain geometric shapes sont simply not solid or strong enough before plus layers have been added, therefore needing le help of extra impression 3Ded structures de support.
Overhangs typically devez supports underneath, so there va be no drooping or falling pièces pendant impression. Very short bridges generally can work without supports, but longer ones va devez support to avoid them sagging or connecting in weird ways. Islands sont shapes that sont not connected at le bottom of le print, et often completely isolated from other pièces, so they also devez a structure to help keep them in place pendant impression. And finally, deep holes in models can also devez support en raison de similar reasons as overhangs.
Le Types of impression 3D Supports
Now that we've discussed le types of problems avec some modèles 3D, it est time to take a closer look at le actual structures de support commonly used. Below we've included a few image examples to help visualize ce.
Tree Supports
Tree support in impression 3D slicer
We start out avec tree supports for impression 3D, as they sont one of le la plupart courants types for nombreux different models et shapes. They tend to branch out from le base of le impression bed, in order to then slightly connect avec any overhangs or other problem areas, to support them in an effective way that also makes them easy to remove. Tree support impression 3D can be quite material efficient compared to some other supports, so that vous don't waste much filament ce way.
Grid / Line Supports
Another form of impression 3D structure de support est typically referred to as grid supports, although some personnes call them line supports, as they look like a grid when viewed in 2D. They sont idéal for providing extra résistance et stability to a number of different challenging shapes, but sont especially used for large et flat shapes, as well as overhanging surfaces that could droop or warp without le support. However, they can be plus difficult to remove et they can also use up plus filament.
Soluble Supports (PVA, HIPS)
Le last method we va discuss today est soluble supports, et as le name suggests, they fabriquer it possible to remove le unwanted material in a much cleaner way by dissolving their connection points. PVA est one such material used that can be dissolved avec simple water, making it a idéal 3D filament to use for supports. HIPS est another commonly used material for ce method, dissolved avec limonene. Le downside est that vous va devez a dual-extrusion printer to use ce method, as vous devez le normal filament in one extruder et le soluble filament in le other.
Comment Set impression 3D Supports
Now that vous saurez a little plus sur what supports sont et when they sont used, it est time to look at comment vous can implement them. Below, we have described some impression 3D support settings vous can try out for reference, but remember that they can vary depending on le slicing software et materials, so use them flexibly as needed. We used Bambu Studio et Geeetech PLA filament as our reference point.
Support Placement
We recommend that vous choisir le option to print supports "On construction plate only", as it va help prevent le support from falling off or becoming unstable. Adjustments may be needed depending on le modèle, however, so keep an eye out at le start of impression.
Support Density
Choisir le density of structures de support est an act of balance. Le denser le support est, le stronger et plus stable it va be. However, it va also be plus difficult to remove from votre impression 3Ded designs, et also use up plus filament. We recommend starting avec around 30% as that est le default. 20% can also work in nombreux cases, so ce est le surface to adjust from.
Support Z Distance
Top Z distance in impression 3D slicer
Choisir le Top Z distance est another factor that plays dans votre globale structure de support, as a larger Z distance makes supports easier to remove but leaves a rougher surface. Start avec le default distance et fine-tune for votre modèle.
Support Top Distance
Top interface spacing in impression 3D slicer
Smaller top interface spacing improves surface qualité but makes removal harder. We recommend that vous use 0 mm for large interfaces, et then try 0.5 mm for smaller interfaces. Again, ce might devez some adjustment to get parfaites.
Support Overhang Angle
Choisir le angle for support overhangs est another tricky thing. On le one hand, smaller angles generate plus supports, while larger angles réduire supports. However, le meilleur setting finds a balance in order to fabriquer removal easy.
Le default setting est 40° et we recommend to adjust based on votre results, so if if le modèle bottom sags or strings, vous should decrease le angle. And if vous find that too nombreux supports form, it can be effective to increase le angle.
Support/Object XY Distance
As for le XY distance for supports et objets, le default setting est 0.5 mm, qui, generally speaking, est a good balance.
Soluble Support Settings
Soluble supports can be set very small or even completely tuned down to 0 mm interface distance, but generally, vous va want a little distance. If vous find that supports fall off easily, then increase density or réduire interface distance.
We also get le option to adjust wall thickness. Ce est especially important for soluble structures de support, as a single layer can have issues avec solvent seeping through when vous remove le support. In ce case, we recommend at least 2-3 layers for a plus robust approach.
Comment Remove Supports from impression 3Ds
Le last section for today va briefly cover comment vous can remove votre structures de support once they have been imprimé together avec votre desired modèle.
Normal Supports
Before vous begin working on votre imprimé design, vous should always allow le modèle to cool down to an approprié working temperature to avoid any accidents. However, supports sont easier to remove when slightly warm, so timing ce step adapté can be helpful as completely cooled off objets sont plus rigid.
We recommend that vous start by removing le supports from le outside in, et also work votre way from large to small structures. One technique that nombreux personnes find utiles, est to twist gently or shake up et down. Many times, le supports can simply snap off, but vous might devez a small tool to help vous cut out tough pièces.
Support was removed
Soluble Supports
For soluble structures de support, le process est different. It va depend on votre chosen filament in particular, so remember to lisez le instructions for votre specific material. Below, we have outlined a rough step-by-step guide for les deux PVA et HIPS, based on our own experience:
PVA:
- Soak in warm water (30–40°C) for several hours.
- Stir regularly or use a soft brush to speed up dissolution.
- Rinse thoroughly avec clean water et let dry.
HIPS:
- Soak in limonene solution et seal le container to prevent evaporation or odor.
- Dissolution usually completes in 1–6 hours.
- Remove avec pliers, then rinse in fresh limonene to clean residuals.
- Allow solvent to fully evaporate in a well-ventilated surface before handling.
Quand removing soluble supports, especially HIPS, vous should work in a decently ventilated surface et wear solvent-resistant gloves et goggles. Avoid skin contact avec limonene for optimal safety et wash it off fast if any contact happens.
Conclusion
Hopefully, we have helped vous understand le key points for le basic principles behind impression 3D supports, different settings et comment to remove votre structures once completed. For new hobbyists, it can take some time getting used to, et dialing in on le parfaites settings for votre specific printer, et each modèle can also have slightly different optimal settings.
We've also covered comment to fabriquer supports easier to remove, et touched on le difference between normal et soluble imprimante 3D support types. So remember, practice makes parfaites, et always keep an eye on votre printer from time to time, to avoid wasted hours if le structure de support or modèle est not working as intended. Happy impression!