Range of Motion Design

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Range of motion design refers to the bending, ariculation, lifting, and other motion of devices as actuated by components such as hydraulic/pneumatic.electric actuators (hydraulic motors, cylinders, etc). When motion happens, parts cannot interfere, hit, or otherwise break the machine upon full range of motion.


  1. Use Range of Motion Analysis Template or similar to paste 2 extreme positions of motion next to each other. Look for extreme positions of turning, lift, rotation, joints, in various configurations. Analize conflicts and failures.
  2. Copy screenshots in various motion extremes from your design drawings into the Template above. Get an angle in a 3D design that shows the motion most clearly. Show the same perspective in both your comparison pictures. Add more pictures and comments if necessary. For 2D Drawings, you can draw range of motion circles for compound motion - see 2D Range of Motion
  3. See also Backhoe Pivot Range of Motion Calculations for a backhoe example.
  4. Publish to the wiki under page named - Machine or Module Name - Range of Motion Analysis.
  5. Embed your google drawing in the wiki page - see Embedding Google Docs in the Wiki
  6. Also - if rapid prototyping scale models are available, move their joints around and take pictures of the various results.