why wont these two parts A and B union ?
no naked edges,
sides are same, I can create a cube then clone and abutt forming one longer 6 sides shape and it will union.
likewise A into C
also why not the screw thread, it intersects the cylinder and if i select each thread and do them one at a time they all union, but select them all and they wont union with the cylinder
Why wont D and E F G union into one item ? no naked edges.
BooleanDifference fail2.3dm (1.4 MB)
if anyone can fix these as job urgent and no time left to fiddle any more, unions do my head in.
I managed the thread one by one but is it ok and why did ot work that way if so ?