BUG: Boolean and Intersect "in progress" issue

[nicola_ciano]

I made a screw using "Sweep 1 Rail, selecting first Helix and then the screw profile. After I wanted to make the boolean union between a cylinder and the screw but it remains blocked as “Boolean union in progress… Press Esc to cancel”

I analyzed the two polysurfaces but there are no NakedEdges.

I attached the file that contain the problem.
simple_object_22.3dm (8.0 MB)

[Tom_P]

find some infos about how to model a thread here:

How to model a nut no videos anywhere

Hi, V5 I search youtube surely someone has done the basic of how to model a nut. BUT NO. some japanese thing with zany music. Vimeo has 929 tutorials but no search facility that I can see. How does one find the one on doing a nut ? Having used hexagon to get solid with correct face to face dim, I just want to see how one gets the curved corners, do they arc or go straight down their slopes, and what decides the shape there. Its the sort of thing that will take an hour to draw a simple nu…

Where is the best thread making video featuring correct method?

there is a very famous german television show for children - and one of their movies shows very precisely how screws are made: [Schraube] the thread is pressed into the rod. this will also lead to more strength instead of cutting the thread. …this means the final ending of the cut / helix - V-shape is given by this mechanical process. link to the other already very elaborated topic about nuts…

my experience is, that threads are easier to model, if you only draw 1/2 turn of a winding, and then multiply those surfaces. handle start and end of the winding separate.

I totally understand your approach of thinking of an inner cylinder - and boolean union it with the winding on top.

but this means that there is a very complex set of approximately overlapping surfaces…
so I am not surprised that boolean union fails…

EDIT:
start with a half turn of the complete thread:

and then _array it in z-Direction

screw_thread_00_tp.3dm (3.2 MB)