{"id":366,"date":"2014-05-26T22:37:10","date_gmt":"2014-05-27T03:37:10","guid":{"rendered":"http:\/\/www.scorchworks.com\/Blog\/?p=366"},"modified":"2024-05-01T20:03:23","modified_gmt":"2024-05-02T01:03:23","slug":"newtons-cradle","status":"publish","type":"post","link":"https:\/\/www.scorchworks.com\/Blog\/newtons-cradle\/","title":{"rendered":"Newton&#8217;s Cradle"},"content":{"rendered":"<p><a href=\"http:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newtons_cradle.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-363\" src=\"http:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newtons_cradle.gif\" alt=\"Newtons Cradle GIF\" width=\"320\" height=\"240\" \/><\/a><\/p>\n<p>Over the Memorial Day weekend I made this <a href=\"http:\/\/en.wikipedia.org\/wiki\/Newton%27s_cradle\">newton&#8217;s cradle<\/a> for my kids.\u00a0 I used some 5\/8 inch ball bearings I had left over from another project.\u00a0 Instead of trying to drill into the bearings I choose to injection mold a plastic ring around the bearing.\u00a0 This allowed me to tie the strings to the injection molded plastic part rather than directly to the ball bearing.\u00a0 Below is a picture of one of the ball bearings with the ring molded around it (and the aluminum mold).\u00a0 The plastic was molded right onto the bearings inside the mold.<\/p>\n<p><a href=\"http:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newton_mold.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-365\" src=\"http:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newton_mold.jpg\" alt=\"Newtons Cradle Mold\" width=\"640\" height=\"480\" srcset=\"https:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newton_mold.jpg 640w, https:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newton_mold-300x225.jpg 300w, https:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newton_mold-624x468.jpg 624w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<p>I used fishing line to tie the bearings to the frame.\u00a0 The fishing lines for each bearing are passed through a small holes in the top board and wrapped around a screw.\u00a0 Turning the screws on the top board adjusts the length of the strings to fine tuning the alignment of the bearings.\u00a0 Aligning the bearings is critical to getting good performance from the newton&#8217;s cradle.<\/p>\n<p><a href=\"http:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newton_close.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-364\" src=\"http:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newton_close.jpg\" alt=\"Newtons Cradle Closeup\" width=\"640\" height=\"480\" srcset=\"https:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newton_close.jpg 640w, https:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newton_close-300x225.jpg 300w, https:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/newton_close-624x468.jpg 624w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<p>The injection molded collar for the bearings was designed on my Android phone using <a href=\"http:\/\/www.scorchworks.com\/ScorchCAD\/scorchcad.html\">ScorchCAD<\/a> while I was at one of my kids baseball practices.\u00a0 I exported and STL file for the mold from ScorchCAD and created the g-code file for my CNC mill using <a href=\"http:\/\/www.grzsoftware.com\/\">MeshCAM<\/a>.\u00a0 So unless someone protests I am claiming I made the first physical part from a part designed from start to finish on a smart phone using ScorchCAD.\u00a0 A screenshot of the ScorchCAD part is shown below.<\/p>\n<p><a href=\"http:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/shot_0000021.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-367\" src=\"http:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/shot_0000021.jpg\" alt=\"Newton ScorchCAD\" width=\"320\" height=\"480\" srcset=\"https:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/shot_0000021.jpg 320w, https:\/\/www.scorchworks.com\/Blog\/wp-content\/uploads\/shot_0000021-200x300.jpg 200w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Over the Memorial Day weekend I made this newton&#8217;s cradle for my kids.\u00a0 I used..<\/p>\n","protected":false},"author":1,"featured_media":363,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,11],"tags":[],"_links":{"self":[{"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/posts\/366"}],"collection":[{"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/comments?post=366"}],"version-history":[{"count":2,"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/posts\/366\/revisions"}],"predecessor-version":[{"id":369,"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/posts\/366\/revisions\/369"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/media\/363"}],"wp:attachment":[{"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/media?parent=366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/categories?post=366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.scorchworks.com\/Blog\/wp-json\/wp\/v2\/tags?post=366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}