3 D Printing 16mm models

[Peter Butler]

Boys and their toys!!!!! Good to know we don't have to grow up.

[ge_rik]

Boys and their toys!!!!! Good to know we don't have to grow up.

It's what keeps us all so youthful ....
Rik

[ge_rik]

The XYZ cube. There seems to have been a fractional Y shift about 2/3 of the way through the print, otherwise very pleased.

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Rik

[philipy]

Well done Rik ( and Mrs Rik!).
Must admit I'd never even heard of this manufacturer before. What size is the build plate, it looks quite big?

The Y shift part way up is something that I get occasionally and I've never found out why. It appears to be with the slicer output since it is repeatable, but of course it could be in the original CAD drawing and the slicer is simply faithfully reproducing what it is fed!

[Andrew]

Hi all,

Thought I'd join in the fun so have downloaded and am currently playing with Sketchup - I can see the potential, but I think I've got a lot more tutorials to watch!!!

Push/pull and offset tools are fun, but I'm currently struggling to combine the two in a way that ensures that shapes I create are solid... I'll let you know how I get on!

Cheers,

Andrew.

[ge_rik]

What size is the build plate, it looks quite big?

The potential build volume is 300 X 300 X 400
The heating element covers the whole area, so it might be feasible to print to the edges. My cheapo printer only years the middle of the bed.

Rik

[philipy]

Push/pull and offset tools are fun, but I'm currently struggling to combine the two in a way that ensures that shapes I create are solid

Andrew, Push/pull is essential, but I didn't get to grips with the Offset for quite a while and don't use it that often even now. It's useful on curved shapes but for rectangles/straight lines it's just as easy to simply measure and draw straight lines. "Follow Me" is also very useful as are the two "Intersect Faces With..." tools.

If I can help feel free to PM me.

[Trevor Thompson]

Andrew

That is interesting. The push pull I use all the time. The offset I have never used. I haven't found the follow me to be much use. When I want it to follow around a curve - bent pipes for example it doesn't work. No idea why. I also tried to make a ball with it and that didn't work either. I came to the conclusion that it was something which only worked properly in the paid version.

Trevor

[philipy]

Andrew

I haven't found the follow me to be much use. When I want it to follow around a curve - bent pipes for example it doesn't work.

It does work but I suspect it is very unforgiving of the geometry it is being asked to follow and then it says something about the path not starting or ending correctly, or a couple of similar messages. I have found that curves don't always select properly and it is necessary to highlight some or all of the individual segements.
Take a look at https://gardenrails.org/forum/viewtopic ... 15#p140475 and then read my follow up reply to Peter Butler at 2pm the next day.

[Andrew]

Thanks for the thoughts chaps, and the offer of help Philip - I'm looking forward to have another play with it, maybe this evening.

I drew something that looked vaguely like a tipper wagon body yesterday (from memory, just to practice), but think probably I need to get stuck into a project and see where it takes me...

Andrew

[philipy]

Andrew,
I understand your desire to draw a wagon body, but I'd suggest starting with something much simpler to begin with, say the window frames that Rik and I were messing about with a few weeks ago, or something equally simple. The first thing I did was a simple 4 part platform seat ( two mirrored ends ( inner and outer faces) plus identical slat seat and back ), both to develop my drawing skills and then my first foray into actual printing.

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[Andrew]

Good advice!

I wish I'd read it before I got stuck in to building the floor of my wagon! Several hours later I've got something that looks reasonable - although I've no idea if it'll make a viable print!

I'm attempting a model of an FR tipper wagon, built on the chassis of a 3T slate wagon - see: https://www.festipedia.org.uk/wiki/Four ... ate_waggon. I've started by measuring up the floor and underframe of my model of the slate wagon (itself 3D-printed, but not by me!), copying some of the details and adding some from the tipper. Here's where I'm up to - this is upside down:

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Couplings next, maybe, but not until tomorrow!

Cheers,

Andrew

[Trevor Thompson]

Andrew

I haven't found the follow me to be much use. When I want it to follow around a curve - bent pipes for example it doesn't work.

It does work but I suspect it is very unforgiving of the geometry it is being asked to follow and then it says something about the path not starting or ending correctly, or a couple of similar messages. I have found that curves don't always select properly and it is necessary to highlight some or all of the individual segements.
Take a look at https://gardenrails.org/forum/viewtopic ... 15#p140475 and then read my follow up reply to Peter Butler at 2pm the next day.

Well that is interesting! I like the pipework. I will have another look at the follow me tool!

Trevor

[philipy]

Something I was trying to demonstrate to somebody else:

Draw the line in the shape you want, then draw the cross-section you want ( make sure it is touching the end of the line)

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Select the line ( make sure you get ALL of it)
Select the Follow Me tool and click on the cross-section shape... magic happens!

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BTW, the two versions show the difference between the default 24-segment circle on the rhs and a 96-segment circle on the left.

[ge_rik]

My latest project has been to replicate the open wagons which I constructed from my own resin castings. I was interested in how a 3D printed version might compare. The originals used Hartland Loco Works mini-series wagon chassis which, at the time, could be picked up for less than £10 each. They have now ceased production and so I have produced my own version which uses the same dimensions but has more appropriate W-iron leaf spring suspension than the HLW version. Still a bit more tweaking to be done - the internal planking disappears because, I am reliably informed, of the 'elephant's foot effect' so I need to compensate for that. But, I'm quite pleased with the outcome. All drawn in TinkerCAD BTW.

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Rik

[ge_rik]

Just in case you need it too ....


Rik

[philipy]

That looks good Rik.
Can't say I've ever heard of your elephants foot before and as far as I know I haven't suffered from it ( my shoes still seem to fit OK! )! I've printed several of these with no probs.

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[ge_rik]

That looks good Rik.
Can't say I've ever heard of your elephants foot before and as far as I know I haven't suffered from it ( my shoes still seem to fit OK! )! I've printed several of these with no probs.

How have you got the detail on the inside of the wagon? Did you print the wagon body as a whole unit or each side separately before gluing them together?

Rik

[philipy]

A bit of a mixture tbh.
The basic box was printed as one piece and then the iron work and end stantions were printed seperately and glued on. The floor is a piece of scribed 2mm styrene glued inside the body and the underframes etc are printed and glued together underneath. The floor was done that way partly to save printing time and because it easier to get the grain effect with a file on a flat sheet than trying to print it somehow.

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[ge_rik]

Interesting. I suppose printing the sides vertically works well as the striations give the impression of woodgrain. I wouldn't have dared to try printing the body in such an orientation on my old printer, but I could give it a try on my new one.

Rik