Alignment problem

charles_putney

I have two parts that fit together in an assembly.  The pillar in the part Base defined in sketch 8 is on the vertical centerline.  The hole in the part Cover is on the vertical centerline.  But in Assembly2 they are not aligned. I can't see why they should not be vertically aligned.

https://cad.onshape.com/documents/f47ac270fa1f159d8094bd2c/w/e13a2d7d9ec39f4328b12f93/e/dbc2be588882dc62f83cbc8b

NeilCooke

You have to add mates between them. Insert the base (press the green check mark in the dialog rather than place it on the screen), right click and Fix. Then insert the cover and use a Fasten mate. 

charles_putney

I have added a fasten mate, but that is not the problem I have.  I have modified the drawings to show my issue more clearly.  The post on the part called Base is dimensioned on sketch 8 and and is on the vertical centerline.  On the part called Cover, the hole drawn in sketch 2 is also on the vertical centerline.  The tab on the parts allows no slop on the fit.  In the Assembly, I think that the post should go through the centre of the hole.

https://cad.onshape.com/documents/f47ac270fa1f159d8094bd2c/w/e13a2d7d9ec39f4328b12f93/e/15198a6aaeb284ed0856e5ef

NeilCooke

You might want to to take a closer look at Sketch 1 in Cover

charles_putney

Whoops.  Red Faces here.