{"id":337,"date":"2018-02-10T12:53:49","date_gmt":"2018-02-10T20:53:49","guid":{"rendered":"http:\/\/saccade.com\/blog\/?p=337"},"modified":"2019-12-28T18:33:40","modified_gmt":"2019-12-29T02:33:40","slug":"the-raspberry-cup","status":"publish","type":"post","link":"https:\/\/saccade.com\/blog\/2018\/02\/the-raspberry-cup\/","title":{"rendered":"The Raspberry Cup and Saucer"},"content":{"rendered":"\n
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My mom collects teacups, and I liked the idea of creating one using 3D tech. She also grows raspberries in her garden – eating them off the vines is always a treat when we visit in the summer. I was mulling over ideas for a raspberry teacup design when the idea struck of using a raspberry leaf as the saucer. Then I started in earnest. This is perhaps an afternoon project for an experienced ceramics artist. But I’m more fond of CAD then wet clay, so I designed it in Fusion 360, and had it fabricated with Shapeway’s porcelain process<\/del>.<\/p>\n\n\n\n\n\n\n\n

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I started by taking a generic looking teacup and making a bunch of measurements on it. My notes were covered in soot after the fire<\/a>, so I worked from photos of the graph paper. Turns out there’s a lot of basic measurements you need to hit: the rim of the saucer must come up enough to comfortably get your fingers under it, the base for both saucer and cup is a circular rim (a solid flat area increases the chance imperfections will make it wobble), the handle must accommodate your fingers, etc.<\/p>\n\n\n\n

The cup is simply stacks of concentric overlapping spheres, with the interior carved out by a surface of revolution. The saucer was a bit more work; I wound up writing some Python code using Fusion360’s API to cut out the serrated leaf edge.<\/p>\n\n\n\n

Shapeway’s ceramics process has rather strict size limitations, and the original saucer wouldn’t fit in the maximum build space, so I made the set about 20% smaller to fit. That’s what’s pictured above. The narrow end of the cup wasn’t terribly stable, so I added a wider base to compensate.<\/p>\n\n\n\n

It turns out it was possible to print the saucer full size by tilting it 45 degrees off axis. I sent the final piece off just in time for Christmas, and haven’t had a chance to photograph it yet. In the mean time, here’s a reasonable simulation:<\/p>\n\n\n\n

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The tip of the larger saucer drooped a bit during fabrication, so I’ve since added some support ribs underneath to hold it up.<\/p>\n\n\n\n

Update May 2018<\/h4>\n\n\n\n

Alas, it appears the couple of cups I made may become rare collector’s items. All of the large 3D printing companies (Shapeways, Scuplteo and i.Materialise) offering 3D printing in ceramic discontinued this service. If anybody knows of a straightforward service for small-quantity 3D ceramic prints, please post a comment!<\/p>\n\n\n\n

Update August 2018<\/h4>\n\n\n\n

I finally got a chance to photograph the actual cup with the wide base. As you can see, the saucer drooped a bit in firing. A new saucer has been made.<\/p>\n\n\n\n

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My mom collects teacups, and I liked the idea of creating one using 3D tech. She also grows raspberries in her garden – eating them off the vines is always a treat when we visit in the summer. I was mulling over ideas for a raspberry teacup design when the idea struck of using a read more »<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":335,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-337","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-3d","author-jp"],"_links":{"self":[{"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/posts\/337"}],"collection":[{"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/comments?post=337"}],"version-history":[{"count":18,"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/posts\/337\/revisions"}],"predecessor-version":[{"id":637,"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/posts\/337\/revisions\/637"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/media\/335"}],"wp:attachment":[{"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/media?parent=337"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/categories?post=337"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/saccade.com\/blog\/wp-json\/wp\/v2\/tags?post=337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}