flathead screw mates - anti-flip

[tmox]

I have been filling a library with fasteners lately.One of the latest is a flathead fastener.
I thought that by using reference mates in the part that i would be able to get around the fact that whenever you drop a flathead onto a c'sunk hole it always goes in upside down and you have to flip it.
I thought that a coincident mate between the surface of the cone of the fastener and the cone of the hole would do it, along with a concentric mate on the barrel of the fastener. ( I did have a coincident mate on the bottom edge of the fastener cone as well that i have since removed) None of this works.
Even with a single mate just on the cones places the fastener upside down. It seems to be using the edge and not the surface. But, .....WHY....why the bottom edge?? why not the top?? not that i care but, it is definitely not using the "surface".
It is very annoyingly consistent.
Can someone please let me know which reference mates will work as they should.

thanx

 

[DesignerGuy16]

You said it yourself. Mate references only use edges, not faces when you drag them in from your design library.

I personally left mate references off flat head screws to manually add a coincident mate from the screw bevel to the countersink.

James Spisich
Design Engineer, CSWP

 

[ewh]

Wouldn't a concentric mate on the barrel of the fastener be redundant? Won't the countersink suffice?

"Good to know you got shoes to wear when you find the floor." - [small]Robert Hunter[/small]

 

[Keith1029]

I use the fasteners from the toolbox (rather than my own library), but same problem, allways the screws are in backwards. Is there no setting to reverse the default alignment, or alter the alignment of the automate in insertion?

 

[macduff]

Folks, this reminds me when I make an extrusion, or a plane...They always go in the opposite direction than I want it to go. I bet one of the software guys at SW wrote something in the code to annoy us when we model. lol

Colin Fitzpatrick (aka Macduff)
Mechanical Designer
Solidworks 2009 SP 3.0
Dell 490 XP Pro SP 2
Xeon CPU 3.00 GHz 3.00 GB of RAM
nVida Quadro FX 3450 512 MB
3D Connexion-SpaceExplorer

 

[felix7502]

We've created our's with cone Face, Default, Any. When you drag it from the task pane, hold down the Tab key and it will flip over.