We will make decisions between Blender and Fusion 360 based on several criteria, including:īlender (available since 1998), is an open source 3D computer graphics suite. In this article we take a look at two very popular CAD programs: Blender and Fusion 360.Įach CAD software has its own strengths and weaknesses.
Simply put, CAD (Computer Aided Design) software allows you to create 3D objects and export them as STL files for printing. But what happens if you get bored with all the STL files you find online? Or a downloaded 3D model does not quite meet your requirements? In these cases you should look more closely at CAD software. (Alternatively you can use a pinslot, or a planar joint for the lower pulley to animate both revolute and slider motion).Many hobby designers will look for models for 3D printing on one of the many websites for 3D models like Thingiverse, MyMiniFactory or Pinshape. You can then link these joints together so that the revolute motion of the top pulley drives both the revolute and the vertical motion of the lower pulley. You can model revolute joints for both pulleys and a slider joint for the lower puller to animate the vertical motion. Since the rope is not just a vertical piece but loops back and forth a few times in a block and tackle, I would recommend modeling the pulleys and based on their sizes, calculating how their motion affects each other.
If the rope were only a vertical piece, I might've recommended modeling it as a solid, and using it to animate a joint or in a contact set. While there isn't a direct way to model the mechanism, mostly because the rope will be a challenge, there might be a few ways that you can approximate the function of the mechanism. Hi is an interesting problem to tackle in CAD.
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