1000G Best Free STL File for CNC Router in 2021

Best STL File For CNC Router

1000G Free STL File for CNC Router

1.What is The STL

STL is a file format native to the stereolithography CAD software created by 3D Systems.STL has several backronyms such as “Standard Triangle Language” and “Standard Tessellation Language”.This file format is supported by many other software packages; it is widely used for rapid prototyping, 3D printing and computer-aided manufacturing.STL files describe only the surface geometry of a three-dimensional object without any representation of color, texture or other common CAD model attributes. The STL format specifies both ASCII and binary representations. Binary files are more common, since they are more compact.

An STL file describes a raw, unstructured triangulated surface by the unit normal and vertices (ordered by the right-hand rule) of the triangles using a three-dimensional Cartesian coordinate system. In the original specification, all STL coordinates were required to be positive numbers, but this restriction is no longer enforced and negative coordinates are commonly encountered in STL files today. STL files contain no scale information, and the units are arbitrary.

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2.Format of STL

The order of the vertices of the triangle follows the right-hand rule. There are 2 types of STL files: text files (ASCII format) and binary files (BINARY).

STL file

STL file

The ASCII format of STL is as follows:

solid filenamestl //File path and file name

facet normal x y z // 3 component values of the normal vector of the triangular face

outer loop

vertex x y z ∥The coordinates of the first vertex of the triangle

vertex x y z // The coordinates of the second vertex of the triangle

vertex x y z ∥The coordinates of the third vertex of the triangle

endloop

endfacet // The first triangle face is defined

endsolid filenamestl ∥The end of the entire file

The format of the STL binary file is as follows:

The binary STL file uses a fixed number of bytes to give the geometric information of the triangular facets. The first 80 bytes of the file is the name of the part stored in the file header, which can be put in any text information; followed by a 4-byte integer to describe the number of triangles of the entity, and the following content is to give each triangle one by one. The geometric information of the patch. Each triangular face occupies a fixed 50 bytes, which in turn are 3 4-byte floating point numbers, used to describe the normal vector of the triangular face; 3 4-byte floating point numbers, used to describe the coordinates of the first vertex ; 3 4-byte floating-point numbers, used to describe the coordinates of the second vertex; 3 4-byte floating-point numbers, used to describe the coordinates of the third vertex, the last 2 bytes of each triangle are used The attribute information (including color attributes, etc.) describing the triangle patch is temporarily useless. The size of a binary STL file is the number of triangles multiplied by 50 plus 84 bytes.

The STL model is a geometric model that represents the outline shape of an object by a set of triangles. In practical applications, there are requirements for STL model data, especially in the RP field where STL models are widely used. STL model data needs to be tested before it can be used. This inspection mainly includes two aspects: the validity of the STL model data and the closedness inspection of the STL model. The validity check includes checking whether the model has geometric defects such as cracks and isolated edges; the closeness check requires all STL triangles to form a closed geometry inside and outside. The STL model in the STL model reconstruction technology discussed in this article assumes that it has been tested for validity and closedness and is a correct and effective STL model.

Since the STL model only records the geometric position information of the surface of the object, and does not have any topological information that expresses the relationship between the geometric bodies, it is a very critical step to reconstruct the topological information with the position information in the reconstruction of the solid model. On the other hand, most of the product parts (structural parts) in practical applications are obtained from regular geometric shapes (such as polyhedrons, cylinders, transition arcs) through topological calculations, so for the reconstruction of structural parts models, the reconstruction of topological relations is concerned. It seems particularly important. In fact, the B-rep model commonly used in CAD/CAM systems is expressed based on the basic geometric voxel Boolean operation of this boundary representation.

 

Therefore, the reconstruction process of the STL model is as follows: firstly reconstruct the triangle topological relationship of the STL model; secondly, decompose the basic geometric voxels from the overall model; reconstruct the regular geometric voxels; then establish the topological relationship between these geometric voxels; finally rebuild the entire model.

 

3.Free STL files for cnc router that BuyCNC can supply:

1.Free stl files for cnc router for making Furniture

1 Free stl files for cnc router for making Furniture

2.Free stl files for cnc router for making wooden door

2 Free stl files for cnc router for making wooden door

3.Free stl files for cnc router for making decoration

3 Free stl files for cnc router for making decoration

4.Free stl files for cnc router for making round object

4 Free stl files for cnc router for making round object

5.Free stl files for cnc router for making partition hollow

5 Free stl files for cnc router for making partition hollow

6.Free stl files for cnc router for making partition hollow

6 Free stl files for cnc router for making jade stone

7.Free stl files for cnc router for buddha statue

7Free stl files for cnc router for buddha statue

8.Free stl files for cnc router for making crafts

8 Free stl files for cnc router for making crafts

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4.Some Important Thing About STL Files

1.What is an STL file used for?

This file format is supported by many other software packages; it is widely used for rapid prototyping, 3D printing and computer-aided manufacturing. STL files describe only the surface geometry of a three-dimensional object without any representation of color, texture or other common CAD model attributes.

2.Can you 3D print from STL file?

The STL (Standard Triangle Language) is the industry standard file type for 3D Printing. It uses a series of triangles to represent the surfaces of a solid model. All modern CAD (Computer Aided Design) software allow you to export their native file format into STL.

 3.How To Make a 3D Model from Photos in 5 Easy Steps

Step 1: Capture the object through Digital Photos. …

Step 2: Create a 3D Model from Photos: Upload your images to Autodesk 123D Catch. …

Step 3: Review and clean up your 3D model. …

Step 4 (Bonus!): Edit your 3D Model and Tap into Your Creative Spark. …

Step 5: 3D Printing Based on your Images: Print your 3D Model with i.materialise.

4.How to convert jpeg to stl

Upload JPEG-file. Click “Choose File” button to select a jpeg file on your computer. JPEG file size can be up to 50 Mb.

Convert JPEG to STL. Click “Convert” button to start conversion.

Download your STL. When the conversion process is complete, you can download the STL file.

5.Three editors that can edit STL file

1.MeshLab

MeshLab is a very complete free and open source program that can edit your STL files. It is an editor that professionals particularly like because they like MeshLab’s numerous mesh and point cloud processing functions. They also like its excellent effect in managing large files.

MeshMixer is a free mesh editing software. You can download it on the Internet.

2.FreeCAD

FreeCAD is a free open source CAD software. It uses parametric modeling, and it can be used from beginners to professional 3D designers. Because it is very easy to use, you can quickly master it even if you are a beginner.

3.Blender

Blender is also an excellent free design software that can be used for 3D printing. It contains a variety of useful functions, such as various algorithms that can smooth and interpret curved surfaces. Using these software tools, you can easily edit and repair STL files. If you need to sculpt and process the fine details of 3D models, this is a great STL file editor. But it is more difficult to learn.

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5.How to get the free STL files for cnc router?

BuyCNC have free STL files for cnc router over 1000G for various industries. If you need the free STL files for cnc router, please contact us online and tell us your industry, and we will give it to you for free.We can provide you with the most complete CNC router machine, such as wood CNC router machine, stone CNC router machine, metal CNC router machine and desktop CNC router machine etc.If you are really interested in our machines, we promise to provide you with the best prices and the best pre-sales and after-sales services in the market.

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