3. Task “Hollow Cylinder Modeling“

QR example for Hollow Cylinder into Cospaces (https://edu.cospaces.io/WJF-DHM) 

1.1. Objective: Create a hollow part where:

• The outer ring dimensions are 100x100 mm
• The inner ring dimensions are 90x90 mm
• The height of the part is 60 mm

^{Figure 9. Hollow Cylinder Modeling}

1.2. Insert a Cylinder:

• Open the Basic Shapes Library and select a solid cylinder.
• Click and drag the cylinder onto the workplane.

^{Figure 10. Inserted Standard Solid Cylinder}

 1.3. Adjust Cylinder Dimensions:

• Select the base of the cylinder.
• Click on the square handles that define its dimensions.
• Change the values to 100x100 mm.

^{Figure 11. Adjusting Cylinder Dimensions}

• To adjust the height, rotate the view to side perspective.
• Click on the top square handle and set the height to 60 mm

^{Figure 12. Adjusting Cylinder Height}

1.4. Creating the Hollow Section. A hole can be modeled using the same cylinder by changing the part style from solid to empty space.

• Insert another cylinder from the Basic Shapes Library.
• Set its base dimensions to 90x90 mm.
• Set its height to 90 mm (larger than the outer cylinder to ensure a clean cut).
• Insert a ruler to assist with precise alignment and let's identify it with the square of the cylinder (when viewed from above):

^{Figure 13. Inserting a Ruler}

• Move the smaller cylinder and align it to the corner of the ruler.

^{Figure 14. Aligning the Second Cylinder with the Ruler}

• To center the smaller cylinder inside the larger one, adjust its position by setting the offset values to 5 mm in both directions. 

^{Figure 15. Centered Inner Cylinder}

• Convert the inner cylinder into a hole by selecting the "HOLE" option in the properties panel.

                   

^{Figure 16. Changing Cylinder Material to "HOLE"}

 

1.5 Grouping the Cylinders to Create the Hollow Shape: 

• Select both cylinders (outer and inner).
• Click "Group" to combine them and remove the hollow section.

                 

^{Figure 17. Grouping the Parts}

1.6. Exporting for 3D Printing

• Click "Export" to prepare the file for 3D printing.
• In the pop-up window, select ".STL" as the file format.

 

^{Figure 18. Selecting STL File Format for Export}

The file is now ready for 3D printing!

 

^{Figure 19. Detail preview}

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¹ Officially available for the Apple iPad as a free download from the App Store.