A practical guide to lower production prices through design optimization and correct file handling
We want to be your fair partner in production. Our price calculator looks primarily at two things when you upload your file. It is about how much material we need to use and how much time our 3D printer takes to build the part. If you help us cut down on these two factors, we pass the savings directly on to you.
Many files contain unnecessary material or are oriented in a way that requires expensive support structures. With a few adjustments in your design or your export, you can often reduce the price significantly. Here is the recipe for trimming your files for the best possible price.
How does material volume affect your price?
The price follows the volume directly. A solid block costs significantly more than a hollow shell, even if they look the same from the outside. Therefore, the most effective saving exercise is to remove material where it does not have a function.
Why solid blocks cost a fortune
Use shelling or hollowing in your CAD program. Instead of a solid block, you should design the part with a wall thickness of 2-3 mm. This often removes a large part of the material in larger parts. If you upload a solid file, our system will calculate the price based on it being printed with a certain amount of infill. By hollowing the model yourself, you have full control over the wall thickness and ensure the lowest material price.
Strength is in the walls
There is a widespread misunderstanding about infill, which is the filling inside the walls. Many believe that more infill provides more strength, but the reality is often different. The strength in a 3D print comes primarily from the number of walls or perimeters. If you need a strong part, it is better to increase the number of walls to 4 or 5 and keep the infill low, rather than pumping the part full of plastic.
For visual models that do not need to bear weight, you can advantageously use a technique called lightning infill. This structure only grows to support the top layers and leaves the bottom of the print almost empty. This can reduce the weight by up to 20 percent compared to traditional grid structures. If you use modifiers in your slicer, you can even settle for reinforcing specific areas, such as threads or hinges, while the rest of the model remains light and cheap.
Avoid islands that prolong 3D print time
The design of your holes and cutouts affects the 3D print time. If you, for example, design a ventilation grille with thousands of small round holes, you force the machine to stop and start constantly. Every time the print head moves from one hole to another, it performs a retraction of the filament. These small pauses add up. By instead using long slots or grooves, you keep the machine in constant motion. This reduces your 3D print time significantly, which is reflected directly in the price.
How do you place the object for the fewest supports?
Support material is scaffolding we print to hold up overhanging parts of your design. It costs money to print, and we spend time removing it afterward. You pay for both, so it is important to avoid it in the design phase.
Slanted edges support themselves
In the design process, you should choose chamfers over fillets. A fillet is a rounded edge, which often starts with a horizontal overhang that requires support to stay sharp. A chamfer, on the other hand, is a slanted edge, typically at 45 degrees. A 3D printer can build a 45-degree angle without problems and without support. By consistently using chamfers on overhanging edges, you save us post-processing time.
Design holes for horizontal printing
If you print a round hole horizontally, the top of the circle will often collapse slightly due to gravity. To avoid this without using support, you can change the hole’s shape to a teardrop shape, where the top tapers at a 45-degree angle. This makes the hole self-supporting and ensures a precise result without the need for manual cleaning.
Stability allows for higher speed
The orientation of your part is not just about support, but also about physics. Tall, thin parts tend to vibrate if the printer runs fast. This forces us to lower the speed to avoid surface errors. If you lay the part down, the layers lie stable like bricks on top of each other. This allows us to run the machine at full speed, which reduces your total 3D print time and thus the price.
How do layer height and quality play in?
Time is a major factor in pricing. The thinner the layers we print, the more times the print head must pass over the part, and the longer it takes.
Choose the right layer height for the purpose
You should consider what the part will be used for. If you need a quick functional prototype to test fit, you can advantageously choose a coarser quality. A print with 0.32 mm layer height is finished significantly faster than a print with 0.12 mm layer height. If the finish is not critical, this is an easy way to save money.
Cheat your way to faster prints with wider lines
An overlooked technique to reduce 3D print time is adjusting the line width. Even with a standard nozzle, it is possible to set the software to print a wider line. This makes each wall thicker. In practice, this means we can often settle for printing one wall instead of two to achieve the same strength. This almost halves the time the machine spends drawing the outline of your figure.
The golden middle ground with adaptive layers
If your design contains both vertical surfaces and curved tops, adaptive layer height can be the solution. This is a technique where the software automatically analyzes the geometry and prints thick layers on the vertical, straight sections, but switches to thin layers on the curved tops. This gives you a nice finish where it counts but keeps the total 3D print time down on the rest of the figure.
How does file quality affect the price?
The file format and resolution are important for how the machine reads your data. An STL file consists of many small triangles, and the number of these triangles matters.
The importance of resolution for the machine
When you export your file, you should do so with care. If you set the resolution too high, the file becomes unnecessarily heavy for the printer to process. This can create micro-pauses in the print while the machine reads data, resulting in ugly marks on the surface. If you set it too low, round surfaces become angular and faceted. A good rule of thumb is to export with a tolerance of about 0.01 mm to strike the balance between quality and file size.
Design your own supports
If you want to save money on post-processing, you can design your own supports directly in the CAD program. The automatic supports generated by slicer software are often too close and can be difficult to remove neatly. By drawing support structures yourself with a small air gap of 0.3 mm to the part itself, you ensure they break off easily without the use of tools. This minimizes the risk of damage to the part and saves time.
How do you avoid expensive errors in assemblies?
The greatest cost in 3D print is a part that needs to be reprinted because it does not fit together with other parts. Plastic can shrink slightly, and tolerances are tight.
Use deformable ribs instead of tight tolerances
When designing parts that need to be assembled, you should avoid relying on ultra-precise tolerances. Instead, make the hole slightly larger than the peg, but add small internal ribs or grip fins. These small protrusions deform easily when you press the part together. This ensures a tight fit, regardless of whether the printer has varied by a fraction of a millimeter, and it reduces wasted prints significantly.
Reinforcement with internal glue channels
If you need to glue two parts together, it is a good idea to design internal channels for the glue. This works a bit like reinforcement bars in concrete. You assemble the parts dry and then inject the glue through a small hole so it distributes internally in the construction. This provides an extremely strong joint without having to print the part solid. This saves material and gives a more durable result.
How much can you actually save?
Here is an overview of what the various optimizations typically mean for the price of your order. The figures are estimates based on typical print tasks.
| Optimization type | Effort | Estimated saving |
| Shelling (Hollowing) | Low | 40-60% |
| Support optimization (Orientation) | Medium | 15-25% |
| Use of Lightning Infill | Low | 10-20% |
| Reduction of layer height (Fine to Draft) | Low | 30-50% |
| Optimization of holes (Slots/Teardrops) | High | 5-10% |
How does material volume affect the price of a 3D print?
The price of a 3D print is directly related to volume, so solid parts are always the most expensive. By designing your part with a wall thickness of 2-3 mm instead of printing it solid, you can often reduce the price by up to 60 percent.
Which infill type is cheapest to print?
Lightning infill is the absolute cheapest solution for visual models, as it only supports the top layers. This structure leaves the bottom of the print almost empty, saving large amounts of material and time compared to traditional grid structures that fill the entire part with plastic.
How do I avoid paying for support material?
You avoid support material by designing with self-supporting angles of 45 degrees, called chamfers, instead of round edges. Furthermore, ensure to orient your part so that large surfaces lie flat against the build plate, which eliminates the need for expensive scaffolding under overhanging parts.
Is it cheaper to print with a high layer height?
Yes, a coarser layer height like 0.32 mm reduces 3D print time significantly, resulting in a lower price. If you need a functional prototype or a part where surface finish is not critical, draft quality is an effective way to halve production costs compared to fine settings.
How do I design holes without using support?
You should design horizontal holes with a teardrop shape, also known as a teardrop, where the top tapers at a 45-degree angle. Circular holes printed horizontally will often collapse at the top, while the teardrop shape makes the hole self-supporting and removes the need for internal support and post-processing.
What resolution should my STL file be exported in?
A tolerance of around 0.01 mm provides the best balance between file size and surface quality. If you set the resolution too high, the file becomes heavy and can create pauses in the print, while too low a resolution makes round surfaces angular. The right export ensures a smooth result without problems.
Are you ready to upload your optimized file?
Now you have the tools to design smarter and cheaper. By removing unnecessary material, thinking in 45-degree angles, and choosing the right quality, you get the same great product, but at a sharper price. We call that common sense and good business action.
Have you adjusted your file? Go to our price calculator and see the difference in INR immediately. Upload your file now, and let us start production.
