@box said:

By Solid selection fence I mean the difference between selecting from left to right and right to left.
Have a look at this gif and notice the dotted selection fence and the solid selection fence and what they select. Left to right creates a solid framed box which selects everything entirely within that box. Right to left is a dotted line box that selects everything it touches.
So in the earlier selection I when left to right and stayed above the back edge line so it selected the whole top.

I'm afraid it's not off to bed yet, there is pub time to deal with.

In all the time playing with SU I've never realised the selection 'fence' does that! Very useful to know thanks.

"solid selection fence" something else to Google...

Thanks again Box, you're a star. Off to bed now young man!
If you ever feel the urge though, I'd love to know how you did it.

@box said:

Do you mean like this?

When you selected the front edge, how did you make it snap to just the front edge? Or is that the magic of the GIFF and you used the same technique as me?

You made selecting that wall look so easy! After faffing about unselecting a lot of walls and edges I managed to expand that wall but am left with the problem of pushing that carb section of the wall back 100mm.

Airbox v6.skp

Kerching! Yes, well, no, but I can maybe do what I want that way. I need to leave room for the carb to go in the gap. I'll have a quick go at that. Back in a minute or ten.

The other problem: I need to expand the internal volume: on the whole, more is better in airboxes. I have plenty of room behind the carburettor so the plan is to expand in this direction:

I wouldn't be on here asking for help if I hadn't struggled for a week with this, how do I move the external faces of the wall as well as the internal faces so keeping it solid and wall thickness of 4mm? (The carburettor goes in the gap between the two 'extrusions'.)

I tell you, it's got me stumped! I thought I could draw the lines on the internal walls and push them out to meet the externals but it's not an elegant way of doing things, I thought someone here would have a better way?

One of these days i might get the hang of this program

Thanks very much pbacot! What was wrong? Live and learn and all that.

Ok, that's a useful thing to know. Igot rid of that unnecessary line but I'm still having problems with a partition/flap. I drew it so very carefully as well, or so I thought...

Amended version: Airbox v6.skp

I'm trying to design an airbox for my '76 classic mini I'm having a problem getting the airbox to be solid. Solid Inspector2 says it's solid; Solid Solver says it isn't. Which do I believe? The lid and the bellmouth are both fine, it's just the box itself I can't figure.

I have another problem with expanding the internal volume but I'll leave that for now and see if I (and the good folk of SU) can solve this mystery.

Teig

Airbox v6.skp

Good idea. I spent 30 mins trying to figure out Marcus' words of wisdom and failed so I've started drawing it again. After 2 hours of intensive drawing I've run into the intersect problems again though, SolidSolver has been working on it for the last 10 minutes, I predict failure. I'll go away and try to see how this 'intersect with selection' works.

That's a classy idea Box, if I could get them to lock on tightly that could be a beaut of a way of doing it. Back to the laptop to try to do what Marcus is advising and draw your 'keyholes' up.

Thanks `again folks

@tig said:

Assuming the main part is a solid [group it and see its Entity Info...] you'll need to 'merge' the 'clips'
Note:
The 'clip' on the right is not in the same relationship to the pipe as the left 'clip'.
I assume it should be...
Also the back edge of the clips intersect oddly with the pipe-part and their backside radius does not match the pipe's either [see image] - it will mean far more tweaking later on...
Fix those and then with the parts in the same context use 'intersect'.
You should then be able to use SolidInspector/SolidSolver OR add a SectionPlane to look inside and erase the unwanted faces/edges.

Well it was solid at some point, it just isn't now... The clips were meant to be in the same relative places but of course I do it the amateurish way: by 'feel'
I set the outer radius of the elbow to the same as the inside of the clip - 27.2mm - but unfortunately they didn't match up

I've moved the clips 'in' so there's no gaps between them and the 'body' so I hope that works.

I seem to have some very weird anomalies going on at the back of the elbow, also under the 'front'. What are they, why did they suddenly appear when I ran SolidSolverand how the begorra do I get rid of them?

My mate's been on the blower, says split pins aren't easy enough, he want snap-clip type things, I'll have to search around t't interweb for ideas.

An hour later and I've managed to attach the clips to my model:

Solid Inspector2 is reporting them as solid, SolidSolver is saying I need to select one or other. How would I go about combining the three components into one solid?

Elbow for Catch System.skp

@box said:

Have you thought about a keyhole type slide fitting.
Slide it on and a simple quick release split pin to lock it.

I'm not sure what you had in mind Box, but I've knocked this together as a concept, can anyone see why it wouldn't work?

Split pin Catch.skp

I know the split pin isn't long enough but I can't figure out how to stretch it and it's only for demo.

@d12dozr said:

Superb, Teig! It's neat to watch your progression from the beginning of the thread to now

I did that myself at the weekend, looked back to the start of the thread that is, my comical first-attempts put a smile on my face

Or R-pins for more simplicity? Yes, good idea. I've been looking around at plastic snap-clips for ideas but that might be simpler.

Been playing again tonight and seem to have nailed it

Elbow.skp

Now to get rid of the five star mount and think about how to draw a snap-on clip type system. I've drawn loads of bellmouths of various sizes; it'd be really cool to be able to clip-on clip-off different ones and be able to compare the difference in the torque/power response immediately

I knew immediately I'd have internal face when I pulled 'backwards' didn't know to get rid though. I do now Onwards and upwards, time of home soon for some sleepsssss. Once again, TVM Box.

And I thank you once again Box, I did what you said, couldn't see what you could see to understand why it worked bu the result is solid!

Elbow.skp

@box said:

I can give it to you fixed if you want it.

Yes please Box! My grey matter is frazzled