Translations:Assembly3 Workbench/36/en

From FreeCAD Documentation
  • Fixes 6 DOF, leaves 0 DOF:
    • Lock: The lock constraint fixes all DOFs for a face. It should be used for one base part in each assembly. You may also want to enable the "MoveLock" function (in the tool bar) so that the part can not be moved accidentially. Normally it does not matter which face/line/point you use to fix a part. Also note that the lock is only valid for the direct assembly, i.e. in case of a sub-assembly the parent assembly would still require a locked part on its own.
    • Attachment: Makes both elements coordinate systems equal for all axes. This is computation wise the most inexpensive function and should be used where ever possible. Note that you could use the element properties to compensate for offsets and angles if the two elements are not perfectly aligned.
  • Fixes 5 DOF, leaves 1 DOF:
    • Plane Coincident: fixes Tx,Ty,Tz, Rx,Ry. Only Rz is free. There remains the rotation around the normal passing through the ‘‘center of the plane’’.
  • Fixes 4 DOF, leaves 2 DOF:
    • Axial Alignment: fixes Tx,Ty, Rx,Ry. Only Tz, Rz are free. There remains the rotation around the axis of the shape and the translation along this same axis. Two PointOnLine constraints (if the two points are different) give the same result. The '‘Colinear'’ constraint too.
    • PointOnLine: This eliminates the translation and rotation along the normals to the reference line. Only the translation and rotation along the line axis is allowed.
  • Fixes 3 DOF, leaves 3 DOF:
    • Same Orientation: fixes Rx,Rz,Rz. All T's remain free.
    • Points Coincident: fixes Tx,Ty,Tz. All R's remain free.
    • PointOnPoint constraint eliminates the 3 translations.
    • Plane Alignment: fixes Tz, Rx,Ry (plane motion). This eliminates the translation along the normal to the reference plane and the two rotations around the axes of this plane.
  • Fixes 2 DOF, leaves 4 DOF:
    • Multi Parallel: fixes Rx,Ry. all T's and Rz remain. This eliminates the two rotations around the axes of the reference plane.
  • Fixes 1 DOF, leaves 5 DOF:
    • Points in Plane: Fixes Tz. This eliminates the translation along the normal to the reference plane.
    • Points Distance: fixes the distance between the Element origins.
      This gives you more freedom than Points in Plane

Other

  • Points on Circle: fixes Tz and partially Tx,Ty. Freezes the point translation (or several points) on a circle or disk area. You must pick the circle second. This leaves all rotations free and gives limited translation in the circle reference plane.