Minimum wall thickness for DMLS technology is 0.4mm. It allows for creation of precise geometries. Due to heat conductivity effect, the amount of energy transmitted by a laser beam melts a bit more powder than the focal length of beam diameter.
CAUTION – When creating part walls pay attention to make them complete. Walls with zero thickness will be skipped during printing.
Utilisation of space available on the building platform influences production costs. The more parts we place on the platform, the cheaper a single part becomes.
If a part is too big to place it in the building platform (250x250x290), it has to be sliced into smaller elements, which are assembled afterwards.
CONVEX & CONCAVE ELEMENTS.
DMLS technology allows for high precision of printed parts. When designing convexities and concavities in the form of writing or logotypes, we need to remember about its proper sizes to guarantee readability. The minimum size is 0,3mm.
When building movable components, such as chains, lattices or hinges, we need to remember about retaining the minimum distance between neighbouring walls, which is 0,5mm. It is the minimum value that enables support structure removal and prevents walls from being sintered to each other.
Some types of geometries, such as round holes, generate higher costs. Wide angle require supporting structures. Sometimes it is enough to place a model horizontally on the building platform, but it in the case of more complex models, changing the geometry of the hole thus reducing the angle between walls might be required
Model complexity does not influence the cost of a part.
Each model geometry – especially holes and indentations, must be considered individually in terms of supporting structures and part positioning in order to minimise the production costs.
Part walls do not require supporting structures as long as their draft angle is not lower than 25 degrees. The fewer support structures we need, the faster the building process is, which has positive impact on the cost level.
Support structures are made of the same material as the actual model. If designed properly, they can be easily removed from the part once the building process is over.
A model is metallurgically bonded with the building platform. Once the model is built, it has to be cut away from the platform by means of EMD machine of a saw.
A completely closed model makes it impossible to remove support structures as well as residual powder that was not melted during the process, which increases the weight of a part. That is why it is recommended to implement a hole with a 0,5mm diameter.
Create your project in a 3D software:
Save it as .STP and .STL. file
CAUTION! When exporting files, one must pay special attention to proper parameters, so that the model has unchanged geometry. Below you will find information with regard to proper file conversion
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