3 ms·
> The system connects a bolt-clamped transducer with the brewing basket via a metallic horn – transforming a standard espresso filter basket into a powerful ult
by triceratops 3y ago
> The system connects a bolt-clamped transducer with the brewing basket via a metallic horn – transforming a standard espresso filter basket into a powerful ultrasonic reactor.
Now it can be done without shelling out $695 for a dedicated machine. That's progress. I wouldn't be so dismissive.
- iancmceachern 3y agoBut you have to shell out $10k for a commercial ultrasonic welder from Branson, etc. Just the horn they show in the paper probably cost $6k to make. I wouldn't be too dismissive.
- daniel_reetz 3y agoAlso it will be punishing for pets and MEMs microphones.
- triceratops 3y agoIt's a prototype.
- fallat 3y agoWhat? I went on Aliexpress and found a 40KHz transducer for $40. You can 3D print the attachment, can't you?
- iancmceachern 3y agoA woofer from AliExpress is not a speaker with amp you can use for University level audio work. I expect they used something like these: https://www.emerson.com/en-us/automation/branson https://www.emerson.com/en-us/automation/branson You cannot 3d print anything in the ultrasonic chain, they need to be machined from specific metal, that's why the horns cost so much.
- parineum 3y ago> A woofer from AliExpress is not a speaker with amp you can use for University level audio work. We're talking about coffee here...
- iancmceachern 3y agoExactly! Wars have been fought over coffee, people regularly spend thousands for coffee machines. There are entire companies that exist just to cater to this market. Me, I'm a tea guy.
- JoBrad 3y agoA wholly different set of wars
- fallat 3y agoI looked up "transducer" and it seems to be what you'd need. But! You seem to have found where I was wrong: the horn. The horn seems to be the actual expensive part here. They could start a business I guess selling these en-masse. If anyone has any ideas how a maker could create this within reason please reply.
- iancmceachern 3y agoYou can't really sell them in big quantities because they're typically custom to the task. They need to be custom shaped for each application.
- srmatto 3y agoPortafilters are made in mass so you could make horns for common portafilters.
- deleted 3y ago[deleted]
- bongodongobob 3y agoThey make ultrasonic jewelry cleaners for $75 that should work just fine. You're referencing something that is intended to be used with hundreds of gallons of water.
- iancmceachern 3y agoI'm just talking about the paper. If they had referenced what you mention I would have referenced that
- karaterobot 3y ago> However, engineers from UNSW have now developed a new way to make cold brew coffee in under three minutes – just like a regular hot brew – without sacrificing on the taste experience. I think the commenter you're responding to was calling out the use of the word 'new' (which is used five times in the article) to describe the process, when it's evidently not new at all. The commenter didn't say anything about the price point, and neither does the article.