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3D Printing: An Introduction - Library Program
- 3. FDM or FFF Fused Deposition Modeling Stereolithography SLA SLS Selective Laser Sintering Material: Filament Reels Material: Liquid Resin Material: Powdered
- 8. Design (CAD) STL Conversion / Slicing Printing Removal of Prints Post Processing StepstoPrint
- 9. Design (CAD)
- 11. Printing
- 13. Post Processing
- 21. Create A TinkerCAD Account
- 22. 1. Workplane 2. Building Blocks 3. Operations Options 4. Save, Undo, Copy
- 24. Creating the Solid Circular Disk
- 26. Creating the Circular Hole
- 27. Aligning the Hole and the Disk
- 30. Grouping the Cylinder Shaped Hole and the Disk
- 34. Design the Jaw
- 41. Putting it All Together
- 43. Rotating the Jaw
- 46. Changing Colors
- 49. STL Conversion
- 50. STL Conversion
- 52. Printing
- 55. Printing: Infill
- 59. Accordion Tree
- 61. Post Processing
- 62. Post Processing: Sand & Paint
- 63. FAIR USE NOTICE: This presentation contains copyrighted material the use of which has not always been specifically authorized by the copyright owner, including but not limited to logos and product images. Such material is made available in an effort to educate the public through illustrative examples and to properly identify content. The use of this presentation for educational purposes is held to constitute a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this presentation is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. If you wish to use copyrighted material from this presentation for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner. CC BY-NC-SA 4.0 Licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 4.0 International License Originally created by Rino A. Landa, December 2018
Editor's Notes
- Fused Filament Fabrication (FFF)
- A key principle in 3D modeling is “divide and conquer.” It means that when modeling a complex real world object, we should divide it into smaller geometric shapes and then design these smaller units individually. In the final step, we should put these small units together. This makes modeling a complex object easy. Applying this principle to the wrench, we divide it into three basic units: The ring The handle The jaw
- We will start by designing the ring. The ring of a wrench can be approximated by a solid circular disk with a hollow circular area in the middle. To create this shape, we will first drag a cylinder from the Basic Shapes panel to the workplane. You will notice that the cylinder has five white square handles, four of which are on the plane and one of which is above the cylinder.
- The four handles on the plane can be used for adjusting the cylinder’s length and width. We want our ring to have a diameter of 25mm. Therefore, drag the square handles till the cylinder has a length and width of 25mm. The one above the cylinder can be used for adjusting its height. We want our wrench to have a height of 4mm. Therefore, click the handle with the left mouse button and drag it down till the cylinder has a height of 4 mm.
- Tinkercad operates on the principle of Boolean design, which means it allows you to subtract objects to create hollow areas or add objects to join two shapes. In this case, we will need to use subtraction to create the circular hole in the middle of our ring.
- To use the alignment tool, select the cylinder shaped hole by left clicking. Now press the shift button and select the solid disk. If you do this correctly, you will see that both objects are now simultaneously selected and highlighted.
- Press the Align button on the top menu (marked with a blue rectangle). Black alignment handles will appear on the workplane. Click on the appropriate handles (also marked with blue rectangles) to bring the solid cylinder in the middle of the solid disk.
- As with the ring, we first need to create a circular disk of diameter 30mm and height 4mm. We have done this before, so you should be able to do this step without much problem.
- To create the jaw like shape, we will use the basic shape called “Polygon”. Drag the Polygon to the workplane, select it, and turn it into a hole (as we did in Step 2). Now position the Polygon and adjust its dimensions.
- If you are planning to use the wrench from this Tinkercad tutorial for household repairs, you can choose the dimension of the corresponding nut and bolt. We will use a 15mm jaw and adjust the width of the polygon to 15mm accordingly.
- Make sure the polygon is aligned with the center of the disk by using the alignment tool.
- It’s time to do some subtraction magic. Select both the polygonal hole and the disk by holding shift and selecting both. When they are selected simultaneously, press the Group button on the top menu (marked in the blue rectangle).
- First, position the handle so that it goes a little bit into the body of the ring.
- Select the handle and the ring together and align it so that the handle aligns with the center of the ring. Now press the Group button. This should merge the handle and the ring into one continuous unit. Notice that the merged unit now has a single color instead of two colors.
- The jaw is facing the wrong direction. We need to fix that by rotating it. To rotate the jaw, first select it. You will see that in addition to the white square handlesfrom before, there are three curved handles with double arrows (marked in blue rectangles).
- These are the rotation handles. Use the X-Y plane rotation handle to rotate the jaw so that it faces the direction shown in the figure below
- Now let’s add the jaw to the previously merged unit. The procedure is more or less the same as what we used for adding the handle and the ring. First, drag the jaw and position it so that the handle goes a little bit inside the body of the jaw. Select the jaw and the merged unit simultaneously and align them so that the handle aligns with the center of the jaw. Press the Group button to merge them. You should now have a complete wrench on the workplane. Isn’t that awesome?
- You might want to change the color of the wrench because an orange wrench just doesn’t look right. A wrench should be gray, right?