Tips and Tricks for 3d Designing
Just need to make sure about some rules as mentioned below for 3D Designing/ 3D Printing:
Rule for 45 Degree angle
Remember 45 degree rule, as overhangs that are greater than 45 degrees will need support material to get the model to print. Always try to create your own support / bridging during designing by designing them into your model. This will give you the better result.
Design in a way to Avoid Support Material
As if the any model needs lot of support material then do not worry as they can be removed later on but support algorithms are improving all the time, support material can leave ugly marks on the outside of your prints. Support material can also be time consuming to remove. Design your models so that they are 3D printable without support.
Add Custom Supports
Depending on your software / printer configuration rafts/supports can be difficult to remove and also mar the bottom of your prints. Always make sure about the custom support which can be removed later on.
Fit Tolerances for Interlocking Parts
There are 3 forces to consider when designing Fit tolerances for Interlocking Parts
- Friction: The critical force that holds the joint together. The tighter the joint is, the higher the friction and the more difficult it will be to pull apart.
- Tension: The force that acts to pull the joint apart
- Shear: The force perpendicular to tension that pulls the joint sideways (a tearing force)
For objects with multiple interlocking parts, design in your fit tolerance. Getting tolerances correct can be difficult. Use a 0.2mm offset for tight fit (press fit parts, connecters) and use a 0.4mm offset for lose fit (hinges, box lids). You will have to test it yourself with your particular model to determine what is the right tolerance for the thing you are creating.
Use Shells Properly
Don’t use additional shells on fine featured models, like small text. It will obscure the detail.
Orient for the Best Resolution
Always orient your model for the best resolution possible for that particular model. Models can be sliced into pieces if necessary and then re-assembled. On Fused-Filament Fabrication printers, you can only control the Z resolution. If your model has fine features, make sure the model orientation is cable of printing those features.
Always make sure there should be a minimum/no support while printing along with the direction of the part so that you can check the details while slicing it on 3d software.
Orient for Stress
To keep prints from breaking when force is applied; make sure to orient your model to minimize stress on the part by orienting the model so that the print lines are perpendicular to point of the pressure being applied.
The same principle applies to ABS, which when used to print large models, can split along the Z-axis as they cool on the build platform during printing.
