this post was submitted on 24 Dec 2023
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pretty basic but I made myself a less mess espresso basket prep ring thing. (lemmy.dbzer0.com)
submitted 10 months ago* (last edited 10 months ago) by naevaTheRat@lemmy.dbzer0.com to c/3dprinting@lemmy.world
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It'a detained by magnets so it doesn't get in the basket and interfere with spreading out the grounds. Needs a clean up with a lick of sandpaper, pretty stupid but these things cost like 50 bucks /shrug

EDIT: appreciate all the concern for my health, it touches dry coffee grounds. I agree that if it got wet there'd be health problems but unless it gets real humid there's just no opportunity for decay. As for random leaching same diff, without heat and wet it's not really a concern.

That said I probably will seal an improved design, this is just a test piece.

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[–] Gutless2615@ttrpg.network 18 points 10 months ago (5 children)

Microplastic speed run

[–] pigup@lemmy.world 1 points 10 months ago

He could just run a flame on it to melt whispy plastic strands down

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[–] dangblingus@lemmy.dbzer0.com 17 points 10 months ago (1 children)

3D printed parts are NOT food safe.

[–] chunkystyles@sopuli.xyz 2 points 10 months ago

In general, yes. But the contact here is minimal. I wouldn't be worried.

[–] anguo@lemmy.ca 8 points 10 months ago (1 children)

I've been meaning to make one that molds to my grinder to prevent grinds flying all over the counter.

Just FYI, you can find metal dosing rings with magnets for as low as $3 on AliExpress. I'm sure yours fits better though!

[–] naevaTheRat@lemmy.dbzer0.com 1 points 10 months ago

Huh, didn't consider aliexpress. I have an old lever machine with a non standard basket size (49 mm or something) so idk if they exist for it. I can see one with a brief search, but it protrudes down into the basket to locate itself which is a bit inelegant.

[–] yokonzo@lemmy.world 6 points 10 months ago (3 children)

So usually id agree that 3d prints shouldn't be used for food, but this is a coffee hopper, they're made from plastic already and I guarantee you the ones we used at Starbucks didn't get that clean either, it's fine, just sand it and get rid of those hairs

[–] Maalus@lemmy.world 11 points 10 months ago (1 children)

3d printing vs injection molding is a huge difference, so it's not fair to say "they are both made of plastic".

[–] yokonzo@lemmy.world 3 points 10 months ago (1 children)

It's also not taking a huge amount of friction either, it's literally just a hopper, walls to gravity feed the shelled beans into the grinder, sometimes it's okay to step away from the rules a bit and just go, that'll be fine

[–] Maalus@lemmy.world 2 points 10 months ago (1 children)

"rules" are there for a reason. But hey, it's your health and safety, do whatever you want.

[–] yokonzo@lemmy.world 5 points 10 months ago (6 children)

Yes but common sense is also there for a reason, I would absolutely trust this material to handle very light duty tasks like this. There is a difference between following rules within the boundaries of common sense and spouting them off in any tangentially related scenario without having done any testing yourself or even seeing the product in action. There is simply no way to definitively say "this is a bad idea" without doing microbe tests and comparing it to baseline levels after a period. I think people tend to jump on the not food safe bandwagon a little too readily in this community and I'd rather not see this place become like an average reddit hobby ground

[–] anguo@lemmy.ca 2 points 10 months ago

I'd quadruple upvote this if I could.

[–] Gutless2615@ttrpg.network 1 points 10 months ago (1 children)

Or - and this seems to have escaped your analysis - in this case we’re talking about health and safety rules and rules dealing with food preparation. Not exactly the kind of rules you want to be gambling with. But sure. It’s a feee world, do what you want. But I still wouldn’t want to be using this with my coffee.

[–] yokonzo@lemmy.world 3 points 10 months ago

And you're free not to, just don't bash others for choosing to do so

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[–] naevaTheRat@lemmy.dbzer0.com 5 points 10 months ago

Yeah you need moisture for decay. Tiny fines might eventually go rancid in tiny pores and taste or smell a little bad but idk. She'll be right.

Like it's not like I clean the burrs that grind the beans much so if rotting was a problem I'd be dead already.

[–] Grass@sh.itjust.works 1 points 10 months ago

I use some supposedly food grade filament with a stainless nozzle and dedicated extruder, and after initial finishing they get a dip in food grade epoxy. I only made star wars and penis shaped cookie cutters though.

[–] GreatBlueHeron@lemmy.ca 5 points 10 months ago* (last edited 10 months ago) (2 children)

I know it's probably sacrilege, but I avoid the need for one of these by grinding half a dose, tamping a bit then grinding the rest and finishing the tamp. I'm using a Breville Barista Express so couldn't (easily) use one of these even if I wanted to.

I'm curious how you retain the magnets in it? Are they printed in, or mechanically added later? (I know very little about 3d printing, this just came up in my top-6-hour feed)

[–] maniacal_gaff@lemmy.world 6 points 10 months ago* (last edited 10 months ago) (1 children)

I haven't done much with magnets, but I saw one model where you pause the print halfway through, drop magnets into the holes, then continue the print and they get sealed in Amontillado-style.

[–] PlasticExistence@lemmy.world 4 points 10 months ago (1 children)

Pop the magnets into the paused print.

The magnets: "Hahaha. This is a fine joke, good sir!'

Resume print

Magnets: "Yes, a very funny joke indeed. Wait, sir, where are you going! Sir! SIR!!"

Walk away knowing that neither you nor anyone else will see those magnets again

[–] yokonzo@lemmy.world 2 points 10 months ago (1 children)

Oh God imagine being 3d printed alive into your casket

[–] DreadPotato@sopuli.xyz 2 points 10 months ago

Worst part is it taking forever for it to print the casket around you, and you're just lying there unable to do shit and just watch the casket close around you in ultra slow-mo. Like being buried alive with a tea-spoon for a shovel.

[–] naevaTheRat@lemmy.dbzer0.com 2 points 10 months ago (1 children)

I'm not really a coffee wanker so I don't know one way or the other what tamping halfway would do. I just want to be able to dump the grounds in, shake, and tamp.

The magnets are just push fit into little holes in the bottom. I just tap them in with blunt nail and a hammer.

[–] iamnotdunningkruger@lemmy.world 1 points 10 months ago (1 children)

coffee wanker

Lol wut

[–] naevaTheRat@lemmy.dbzer0.com 1 points 10 months ago (2 children)

Oh you know how coffee people are.

[–] iamnotdunningkruger@lemmy.world 2 points 10 months ago* (last edited 10 months ago) (1 children)

You 3D printed a dosing funnel.

You 3D printed a dosing funnel.

[–] naevaTheRat@lemmy.dbzer0.com 1 points 10 months ago

I refuse to call it that! My machine takes a charge thankyouverymuch. I dose heroin to cope with my self loathing.

Jokes aside it just makes stuff cleaner. You'll be horrified to know I don't usually bother with a needle tool, I think French press and moka pot are actually pretty nice (honestly a giant fan of French press), cold brew is delicious but I absolutely cannot be fucked with waiting hours for my coffee, and if people like milk and sugar it's fine although I do think we could all benefit from eating less sugar as I think acclimatising yourself to sweetness mutes normal flavours in food.

[–] Anticorp@lemmy.ml 4 points 10 months ago

Super cool! Great job. You can eliminate that seam by changing the position to random in Cura.

[–] tcrpz@programming.dev 3 points 10 months ago (1 children)

You can find dosing funnels for ~$12 on Amazon. Still overpriced but eclipsed by the investment you made in the espresso machine.

[–] naevaTheRat@lemmy.dbzer0.com 1 points 10 months ago

I have a non standard old timey portafilter.

Pet peeve, a coffee machine isn't an investment. Not in the literal sense and the creepy corporatisation of language is weird. It's just an expensive toy that makes me like life a little more :) I actually got an old europiccola because no electronics (bimetal strip and heating coil aside) means I can keep this thing working indefinitely.

[–] tonyn@lemmy.ml 3 points 10 months ago (1 children)

A lighter will tidy up the stringing without making the mess that sandpaper will. Just don't linger too long or the part will warp. It should take less than a second to make the strings disappear with a lighter.

[–] IMALlama@lemmy.world 3 points 10 months ago (1 children)

Hot a air station, if you have one, will also do wonders here. I suspect an adjustable hot air gun would also probably work, but those things can put out some serious heat so be careful.

[–] tonyn@lemmy.ml 1 points 10 months ago

I actually use a Lexivon torch, and move quickly. Lots of heat in a precise location for a short amount of time.

[–] 01189998819991197253@infosec.pub 3 points 10 months ago (1 children)

Hey, that's neat! I use a scrap piece from a previous employer. It's a 2inch tall stainless steel combiner ring. Definitely not as cool as yours and definitely not light enough for magnetic holds. You win lol

[–] naevaTheRat@lemmy.dbzer0.com 4 points 10 months ago (1 children)

Yeah but yours isn't made of plastic so I think we can both find things to be pleased about.

Thanks for the kind words!

[–] 01189998819991197253@infosec.pub 4 points 10 months ago (1 children)

Oh, for sure! It is annoying having to hold it as I work with it. But, I don't have a 3D printer, so I did what I could with the tools at my disposal. I am happy with it :)

[–] naevaTheRat@lemmy.dbzer0.com 4 points 10 months ago (1 children)

If it's at all magnetic (I know some stainless isn't) then you could probably just slap a neodidlium magnet on either side to hold it. Or you could make something to locate the phlangey things on the portafilter and attach them to the outside of the ring? Could even be as simple as 4 nails with the tips ground off?

[–] 01189998819991197253@infosec.pub 2 points 10 months ago (1 children)

I have neodymium magnets from another project. I should do that. They're about 2cm in diameter, but I can probably cut them to size.

[–] yokonzo@lemmy.world 1 points 10 months ago (2 children)

I am by no means sure of this, but wouldn't cutting them throw off the magnetic alignment?

[–] naevaTheRat@lemmy.dbzer0.com 3 points 10 months ago* (last edited 10 months ago)

No. The magnetism comes from macroscopic ordering of microscopic features.

Basically you know how if you strap magnets together you get big magnet? small magnet is smaller magnets strapped together.

Magnets are very fragile though and cutting them is hard.

[–] 01189998819991197253@infosec.pub 1 points 10 months ago

I've broken several of them, and they kept their magnetism. Neodymium magnets are like friggin glass in their fragility, though.

[–] NuXCOM_90Percent@lemmy.zip 2 points 10 months ago

Heads up, make sure you use food safe filament for this. And I would still be rather wary of excessive micro plastics in my morning brew

[–] Wxfisch@lemmy.world 1 points 10 months ago (1 children)

Please keep in mind that you need to seal that print before you use it with food. Because of the layers, there’s are a ton of places for dirt and bacteria to hide that are impossible to clean. Additionally, depending on what kind of nozzle you used, heavy metals can end up in your print which you don’t want to then leech into your coffee. General advice is to just not use 3d prints first good, but if you really want to you should coat them in a food safe epoxy before using.

[–] dual_sport_dork@lemmy.world 1 points 10 months ago

This is good advice.

On the bright side for OP, his part should (hopefully) only come into contact with dry coffee grounds so some of those concerns are lessened.

In other applications -- sealant or not -- I can only imagine pouring hot coffee over a PLA part would not be a recipe for success...

[–] Gljvf@lemmy.today 1 points 10 months ago

Pretty cool

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