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A Year of 3D Printing

brookehatton.com

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Re: A Year of 3D Printing

#81

Post by 404mm »

dgroshev wrote: post #34

I'd encourage people doing engineering/functional parts to also try ASA and PC(-CF). Both are pretty easy to print on enclosed printer like Prusa Core One, and they offer unique qualities that are impossible to achieve with PLA or PETG. Prusament PC Blend is insanely strong and stiff, I saw a 3mm PC bracket bending a high quality metal wood screw into an S-shape without breaking. PC-CF is much easier to print, looks…

ASA and ABS really need a good filtration. Like actual filtration, not what the enclosure has. I personally just run a duct to my window and vent outside.

Re: A Year of 3D Printing

#82

Post by summarity »

brovonov wrote: post #26
ConfusedDog wrote: post #7

Gridfinity seems very useful. I might try it. I spent $100 on FB marketplace 2 years ago for a AnkerMake M5C with bunch of rolls of PLA. I've printed hairdryer rack, containers, Labubus as little gifts for neighborhood kids to paint over. I thought about getting a multi-color 3d printer like Anycubic Kobra S1 combo, but the wasting of plastics is holding me back. Snapmaker U1 is much better but more expensive.

The U1, so far, is looking to be a great printer. No idea on long term, but you will not find another toolchanger at that low of a price.

Flash forge is releasing theirs in the next few weeks.

Re: A Year of 3D Printing

#83

Post by _carbyau_ »

jijijijij wrote: post #76
bborud wrote: post #21

I would encourage people who have never designed physical objects before to try to only print things they have designed themselves as an exercise. For perhaps a year or so. If you have never designed physical objects before it is really challenging at first. The learning curve is pretty steep and, at least in my case, I discovered that I didn't have a mental language for thinking about functional 3D and mechanical de…

You can get pretty quickly at it with Blender instead of proper CAD. Just do the "donut tutorial", set the correct workspace dimensions and go for it. You can learn basic modelling in a day. Blender is overwhelming at first glance, but it becomes incredibly intuitive once the UI clicks. Of course modelling for printing in Blender has drawbacks and limitations. It's more fiddly, but unless you are super stupid, you ca…

I second Blender. I don't use anything else and don't see why I would want to. I hope to get into geometry nodes in future.

The donut tutorial is .. handwavy relevant to 3D printing.

3D modelling for 3D printing doesn't require materials, colours, lighting, camera placement etc etc. But doing the donut tutorial will get you used to many aspects of blender and realise just how powerful this software is. It's also kind of a Blender right-of-passage.

The Blender documentation is fantastic if you prefer to learn via pages than random video-build-a-thing tutorials.

Blender tends towards using keyboard shortcuts. Learning them can greatly speed things up.

And Blender has a large body of community forums for questions and answers if you want to search(first), post a question, or likely ask your friendly AI what the answer is.

[edit] the bite sized blender basics videos on the blender.org site no longer easy to find. :-(

Re: A Year of 3D Printing

#84

Post by _carbyau_ »

numpad0 wrote: post #47

Can't help but wonder looking through the gifs, am I actually insane that I MUST fillet, chamfer, or chamfer AND fillet basically every single one of those edges[1] with with tangency weight of 1.5 where possible, until the shape takes a generic apple/bauhaus/lego/ikea style? I'm aware that doing so don't necessarily improve load distribution, but I just can't stop rounding those corners. Am I really the only one? 1:…

You are not alone. I like to round the edges and corners. I feel that it should help the strength on concave corners at least but honestly have no evidence to back this up.

No idea of your "tangency weight" bit though. I use blender bevel tool.

Re: A Year of 3D Printing

#85

Post by [deleted] »

brookke wrote: post #48
jasonblick wrote: post #42

Hello, what are you using to render the models in the webpage? and what format did you export the models as to do that? It looks very nice!

Hey! It's using three.js with rapier for physics. The models are being loaded as STLs using the three.js stl loader https://threejs.org/docs/#STLLoader . https://github.com/Brookke/brookke.github.io/blob/main/src/c...

[deleted]

Re: A Year of 3D Printing

#87

Post by dgroshev »

404mm wrote: post #81
dgroshev wrote: post #34

I'd encourage people doing engineering/functional parts to also try ASA and PC(-CF). Both are pretty easy to print on enclosed printer like Prusa Core One, and they offer unique qualities that are impossible to achieve with PLA or PETG. Prusament PC Blend is insanely strong and stiff, I saw a 3mm PC bracket bending a high quality metal wood screw into an S-shape without breaking. PC-CF is much easier to print, looks…

ASA and ABS really need a good filtration. Like actual filtration, not what the enclosure has. I personally just run a duct to my window and vent outside.

That's largely a myth.

This review [1] cites the absolute highest amount of emitted styrene in the studies they are reviewing to be 113 μg/min. Using [2] for simplicity with styrene's molar mass (104.15 g/mol), we get to a printer creating at most 0.024 ppm of styrene per minute per m3 of unchanged air. For comparison, the "work exposure limit (WEL) for styrene is currently 100 parts per million (ppm) averaged over an 8-hour day" [4].

In other words, as long as you have some air exchange in the room, you'd be orders of magnitude away from the safe work exposure limit on styrene.

It also makes sense, considering that it's a microscopic amount of molten plastic, whereas injection moulding factories work with vats of the stuff.

[1]: https://www.sciencedirect.com/science/article/pii/S135223102...

[2]: https://teesing.com/en/tools/ppm-mg3-converter

[3]: https://en.wikipedia.org/wiki/Styrene

[4]: https://www.hse.gov.uk/plastics/faqs.htm

Re: A Year of 3D Printing

#88

Post by jacquesm »

noo_u wrote: post #59
jacquesm wrote: post #50

Earlier quoted context omitted.

When you print objects with 10's of printers 'tuning your 3D printer' is no longer an option other than to tune it to be 'in spec' You can only tune your designs and the profile for your filament and for a particular model of printer but then all of those have to be close to identical. As soon as you start tweaking your design or filament profile to offset possible issues with the printer you've lost reproducibility.…

The real question is - did you buy 10s of printers because you needed them for the business, or did you start the business to buy 10s of printers :P

I bought one, to try out some ideas, then it sat on the shelf for about a year, then suddenly there were five and so on.

Re: A Year of 3D Printing

#89

Post by m4rtink »

n00shie wrote: post #71
randusername wrote: post #69

Earlier quoted context omitted.

3D printing has been humbling for me. I can express myself well spatially in code, but that doesn't help much in CAD where you have to figure out what combination of buttons and parameters will do what I want. I can manage dependencies well in code, but that doesn't help much in CAD. I continually struggle to design parts with geometry that is dependent on the spatial relationships and constraints of how multiple par…

Have you ever tried https://openscad.org/ ?

OpenSCAD is very nice but if you combine it with BOSL2 you can do miracles:

https://github.com/BelfrySCAD/BOSL2

Re: A Year of 3D Printing

#90

Post by dekhn »

My favorite model of all time is this digital sundial: https://www.thingiverse.com/thing:1068443 It's generated using code that knows the shapes of numbers and "punches them out" of a template object at different angles corresponding to angles of the sun/time relationships.

It would be impractical to make in any method than additive printing.

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