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To get the best out of 3D printing, it helps if you can design your own parts. In this tutorial series, we will learn to use a free 3D CAD program to do just that.

In this episode, I demonstrate how to alter the mating surfaces of multi part designs to include a shadow line. This technique is used in most professionally produced injection molded parts and offers a range of benefits.

3D design for 3D printing source CAD: https://cad.onshape.com/documents/b54...

0:00 Introduction
3D design for 3D printing playlist:    • 3D design for 3D printing tutorials  

0:40 Injection molding recap

1:32 Injection molding design features to ignore
3D printing vs injection molding video:    • Why 3D printing is amazing! (but will...  
Sumitomo bottle cap video:    • 96 Caps moulding in under 1,9 seconds...  

2:50 Shadow lines

3:23 Simple example - box
PEO patterned bed on Aliexpress: https://s.click.aliexpress.com/e/_DCT...

7:15 Complex example - curved mating surfaces
Lumimate torch video:    • I designed this light 20 years ago, n...  

11:38 Summary of benefits

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