FreeCAD Tip - Expressions

Click "...more" for Links, Key Moments, and Related Content! You can link several part dimensions to a single (or a few) primary dimensions using formulas or equations from the constraint dialog boxes. The FreeCAD wiki page (https://wiki.freecad.org/Expressions) calls these "Expressions," and has a wealth of information for using them. Here, I demonstrate the syntax and use of functions referencing objects such as constraints in a sketch, and conditional constraints. Use the wiki page to get more ideas and go wild! My full Library of FreeCAD videos: Part Design Workbench- V0.19 and V0.21 The videos in this series were released before FreeCAD V1.0. There are some nice upgrades in V1.0, but the concepts covered here remain valid. 1) Downloading and finding help - https://www.youtube.com/watch?v=e9-aUgUeZYU&t=8s 2) Workbench, Toolbars, Panels - https://www.youtube.com/watch?v=uRnZ1WWFQVs 3) Zoom, Pan, Rotate - https://www.youtube.com/watch?v=GMQ30kE4lu8&t=1s 4) Sketching - https://www.youtube.com/watch?v=3oB1gRDnLig&t=1s 5) Mirroring and Symmetry - https://www.youtube.com/watch?v=y-dNTOU6j7c&t=2s 6) Sketcher from Part Design - https://www.youtube.com/watch?v=U2_x2RqJb7Q 7) Toggle Const. Geometry - https://www.youtube.com/watch?v=AxBILHZDb8I 8) Edge linked to Ext. Geometry - https://www.youtube.com/watch?v=x7_KgeLOcKY&t=1s 9) Expressions - https://www.youtube.com/watch?v=jMM_aqDNY44&t=19s ---You Are here. 10) Configuration Tables - https://www.youtube.com/watch?v=NazxYVIeCOU 11) Part vs Part Design 1 - https://www.youtube.com/watch?v=mLgRMOTuEw0&t=6s 12) Part vs Part Design 2 - https://www.youtube.com/watch?v=K4ntQzsQlBI&t=1s 13) Generic Vs Native Files - https://www.youtube.com/watch?v=xn_w-SNR6t8&t=1s 14) Sketcher and Part Design updates in V1.0 - Stay Tuned! Assembly Workbench - FreeCAD V1.0.0 1) Assembly Workbench Intro: https://www.youtube.com/watch?v=YMhMQu9DdFU&t=1s 2) Mastering Primary Joints: https://www.youtube.com/watch?v=GyEj_86gw18&t=357s 3) Introducing Secondary Constraints: https://www.youtube.com/watch?v=M_oDScYhFbM&t=3s 4) Advanced Mates: -Stay Tuned! CAM Workbench - FreeCAD V1.0.0 1) Cam Workbench Intro, Design to built part with Maslow CNC - https://www.youtube.com/watch?v=B-L96PCbVa8&t=15s 2) Set Tool Axis, simulate toolpath - https://www.youtube.com/watch?v=eCXKuWd7xMc&t=28s