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3D design printing - Coggle Diagram
3D design printing
dimensions
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dimensioning of circle, arc or holes
dimension by diameter, arc is by radius, and holes are located at the middle
dimensioning angles
have a degree indicated, marked with a curve dimension line
assemblies
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revolute
A revolute joint has a single rotational degree of freedom, much like a hinge. This joint can rotate around the standard X, Y, or Z axis, or around an edge in the model (a custom axis).
slider
A slider joint has a single translational degree of freedom. It is used for components that slide along one another. Options are similar to revolute joint options, except that components slide along the selected axis rather than rotating around it
cylindrical
A cylindrical joint provides two degrees of freedom: one translational and one rotational. Components joined with a cylindrical joint always rotate around the same axis.
pin slot
A pin slot joint also allows two degrees of freedom, but components can rotate around different axes.
planar
A planar joint allows three degrees of freedom. It allows two directions of translation in a plane and a single rotational direction normal to that plane. It is useful for joining two components so they can rotate while sliding across the plane.
ball
A ball joint has two degrees of rotational freedom: pitch and yaw. Pitch allows components to rotate around the Z axis. Yaw rotates components around the X axis.
tolerances
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clearance fit
there will always be sufficient clearance for the shaft to interface with the hole. there would still be an allowance for two parts to move
interference fit
it would be difficult to move or remove the two parts. a lot of force is required to remove the two parts. e.g. are shafts that are fitted through bearings, so that the shaft does not slip