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how to fix (ground) assembly

eric_zhao867eric_zhao867 Member Posts: 5 PRO
For a part that is in an assembly, i can right click and fix its location. It seems I could not find similar function for an assembly. For example, I inserted assembly 1 into assembly 2. I would like to fix the position of assembly 1 in order to used it as a datum. What is the best way to do this? 


  • bradley_saulnbradley_sauln Moderator, Onshape Employees, Developers Posts: 328
    You can right-click on a part from assembly 1 and fix it. As long as that subassembly is properly constrained you are good to go

    Engineer | Adventurer | Tinkerer
    Twitter: @bradleysauln

  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 3,035
    You can only fix parts, so expand your subassembly and fix one of the parts in there. 
  • eric_zhao867eric_zhao867 Member Posts: 5 PRO
    thank you all, that helps. 
  • andrew_kleinertandrew_kleinert Member Posts: 16 PRO
    A question about this:

    Instead of using "fix" for assemblies, are there any issues with mating the first part to the origin, and then building up the assembly using mates?  (Is this potentially a better workflow because the Assembly is then positioned at a known point in space rather than an arbitrary point in space as per the "fix" operation?)
  • TimRiceTimRice Member, Moderator, Onshape Employees Posts: 255
    Yes best practice is to use mates to properly constrain parts rather than a fix. Mating to the origin is a good way of locking down parts.
    Tim Rice | User Experience | Support 
    Onshape, Inc.
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