Joint Question

[richardsalzman]

Quick question regarding joints.

I am trying to design this item so that there will be a 3d printable top and bottom.

I created joint origins and assembled the components together.  The finished product looks correct, but there is a subtle flaw.  When I assembled the joint, I had to move the parts so that they align with the dashed center line of the orange part.  While they appear correct, I did not know how to move it so that it will "snap" to the exact center line.  Please let me know your thoughts... Richard 

[richardsalzman]

OK... I figured out a work-around by sketching a line at the correct height, then placing the joint origin at the correct height.  It worked, but I think there is a better way.

[Drewpan]

Hi,

I don't know what file you have uploaded but I have two half parts that seem to be correctly aligned and will join

so I don't exactly know what your issue is. The parts I have do not match the pictures in your post.

What is the exact problem? Is the issue with the model or the 3D printed parts? Don't forget that 3D printing is great

but printing in most types of plastic you need to take shrinkage into account.

Cheers

Andrew

[davebYYPCU]

Far as I can tell the grey one has to move 0.005 in this direction, otherwise it is correct in both other directions.

(Y offset in the joint dialogue, is 0.055)

It's often handy to see the sketches for this style of Joint. 

Common point of both components would be Centre point of the yellow slot to the projected centre point of the grey sphere cut. 

Can you turn on the sketch in the derived component?

Might help...

[richardsalzman]

Thanks.  I think I had uploaded the incorrect model.  At the end of the day, the work around I did worked perfectly.  In essence, I made a sketch that allowed me to position the joint origin the correct distance from the center line of the part.  This solved the problem.  The part printed perfectly.

Best... Richard