Garden Railway Forum

metalmuncher wrote: ↑Thu Feb 25, 2021 7:03 pm
If you give me the dimensions of the dome and boiler I could send you an STL if you want, as you can see it will only take a minute.

Hi. I am not sure if you found that video or made it fort his example? However it took me hours to follow that video and I still ended up doing things a little differently as I could not see how some of the things were done, presumably keyboard shortcuts?

The main thing I could not follow was how to get the second circle in the centre of the first circle from the view given. I ended up changing to top view to get it central and then changing the view back to extrude it, which I also struggled with as it wouldn't let be extrude the second circle as it was inside the first circle so it kept selecting the first circle, again I changed tack and hid the first one to extrude the second one and then had to unhide it. Although this seems such a simple process in the video, I really struggled, lol

And for those wondering how I did it in TinkerCad, yes I imported the stl file from Fusion 360

-steves- wrote: ↑Sat Feb 27, 2021 9:23 am Hi. I am not sure if you found that video or made it fort his example? However it took me hours to follow that video and I still ended up doing things a little differently as I could not see how some of the things were done, presumably keyboard shortcuts?

Yes, I definitely used keyboard shortcuts in the first half, I thought that would be the easy bit, so I sort of glossed over how to get the two intersecting cylinders. You could do that any number of ways, in the example I used two sketches and extruded but you could have used the cylinder tool instead, it would make no difference as long as you ended up with two joined together cylinders.

From about half way on were the main tools I wanted to show, the fillet using chord length to make the nice even flare and splitting the body using the boiler face as a tool to separate out the dome.

metalmuncher wrote: ↑Sat Feb 27, 2021 9:56 am
Yes, I definitely used keyboard shortcuts in the first half, I thought that would be the easy bit, so I sort of glossed over how to get the two intersecting cylinders. You could do that any number of ways, in the example I used two sketches and extruded but you could have used the cylinder tool instead, it would make no difference as long as you ended up with two joined together cylinders.

From about half way on were the main tools I wanted to show, the fillet using chord length to make the nice even flare and splitting the body using the boiler face as a tool to separate out the dome.

Well the video was extremely useful as I ended up with exactly what I wanted, all be it with a few hours of trying to work out the "simple" bits, lol

It is definitely starting to take shape as a 3D image, the downside being is it will take well over a week of constant printing to complete, in reality, 2 weeks due to not baby sitting it 24 hours a day, WOW! I still have a few minor tweaks to do, but as they say, we're getting there.

And a big thank you to Metal Muncher for the video to produce what I am happy to call the perfect domes that I was after

It looks fantastic - and it gets better at each stage.

Just out of curiosity which double Fairlie are you building - or is it generic?

Trevor

Trevor Thompson wrote: ↑Sun Feb 28, 2021 7:10 pm It looks fantastic - and it gets better at each stage.

Just out of curiosity which double Fairlie are you building - or is it generic?

Trevor

It is just generic, no particular one really, I might give it some name plates to make it look like one, possibly Merddin Emryss as that's the one I have been using the most for reference, but it wasn't intentional, I just love the look of them

Added a bit of detailing to the boiler section today, looks better for it I think.

That really makes a difference, particularly the sand pots - I knew there was something missing!

Andrew wrote: ↑Tue Mar 02, 2021 4:57 pm That really makes a difference, particularly the sand pots - I knew there was something missing!

It did indeed have bits missing and still does, lots and lots to design yet, but getting there, I will start the first test prints next week hopefully.

I see what you mean about the rivets. Perhaps I over emphasise the rivets. Scaling effects are interesting. I think some things have to be over scale to have the expected impact. I make my rivets 1mm diameter and 1mm high - just laziness really.

Trevor

Trevor Thompson wrote: ↑Tue Mar 02, 2021 8:45 pm I see what you mean about the rivets. Perhaps I over emphasise the rivets. Scaling effects are interesting. I think some things have to be over scale to have the expected impact. I make my rivets 1mm diameter and 1mm high - just laziness really.

Trevor

Not that I am a rivet counter, but there are actually less rivets on mine than the real one, they are really small and close on the real one.

Close up they look pretty much better, the 2nd picture is one of the ones I am working from.

I tend to make rivets at about 1 x 1 as well. Any smaller and neither Sketchup nor my printer like them!

I tend to use the dome shape in TinkerCAD. My default value is 1.5mm dia which gives 0.75mm height

Rik

Well I managed to get a bit of movement on the chassis.

I should add that there is no glue yet on any of this, things are just pushed into place with a few bolts here and there, enough to hold it together "just" as it's still all ongoing work.

Yes, I am aware of the wobbly wheels which have since been redesigned and I am also aware of the wobbly gear which I hand drilled as I couldn't be bothered to go to the shed and put it in the lathe, lol

Very impressive.

I know a couple of people were hoping this might make it a bit further than just a CAD drawing, well it has. Still a mega amount to do, nothing is glued in place and half the bits aren't even on it, it's just to give an idea of what is likely to look like further down the line, so to speak.

The CAD work has been difficult as I only have photos to base it on and as you would expect not every part fitted every other part, things like the boiler and the smoke box have had umpteen generations and I am still not happy with the smoke box by a long way. Even the cab started as one piece, then ended up as one piece but with a removable roof and in the end I had to split it in to two pieces so I could get at everything, I reckon I have binned around two complete rolls of PLA in the process

Main problem being this isn't for me, it's for my step father, so I still have one to do for me afterwards, lol.

Wow. Wow. Wow. Etc. Etc.
David.

River Lin wrote: ↑Tue Mar 16, 2021 3:23 pm Wow. Wow. Wow. Etc. Etc.
David.

Quite!! Are the wheels printed as well?

Rik

Wot David and Rik said!
That motion is lovely and smooth as well.

Some while ago I did occur to me to have a go at a Fairlie but then I decided my drawing skills probably weren't up to it. Now I'm glad I didn't show myself up!

That's looking fantastic! Your step-father's a lucky man!

Andrew.