{"id":295,"date":"2017-08-29T05:21:11","date_gmt":"2017-08-29T05:21:11","guid":{"rendered":"http:\/\/www.drawingmachines.net\/?page_id=295"},"modified":"2017-08-31T05:26:12","modified_gmt":"2017-08-31T05:26:12","slug":"two-pendulums","status":"publish","type":"page","link":"https:\/\/www.drawingmachines.net\/?page_id=295","title":{"rendered":"two pendulums"},"content":{"rendered":"<div id=\"pl-295\"  class=\"panel-layout\" ><div id=\"pg-295-0\"  class=\"panel-grid panel-no-style\" ><div id=\"pgc-295-0-0\"  class=\"panel-grid-cell\" ><div id=\"panel-295-0-0-0\" class=\"so-panel widget widget_siteorigin-panels-builder panel-first-child panel-last-child\" data-index=\"0\" ><div id=\"pl-w59a79b306af2c\"  class=\"panel-layout\" ><div id=\"pg-w59a79b306af2c-0\"  class=\"panel-grid panel-no-style\" ><div id=\"pgc-w59a79b306af2c-0-0\"  class=\"panel-grid-cell\" ><div id=\"panel-w59a79b306af2c-0-0-0\" class=\"so-panel widget widget_text panel-first-child panel-last-child\" data-index=\"0\" >\t\t\t<div class=\"textwidget\"><p>either a fixed or moving drawing surface\u2026<\/p>\n<hr>\n<\/div>\n\t\t<\/div><\/div><\/div><div id=\"pg-w59a79b306af2c-1\"  class=\"panel-grid panel-no-style\" ><div id=\"pgc-w59a79b306af2c-1-0\"  class=\"panel-grid-cell panel-grid-cell-empty\" ><\/div><div id=\"pgc-w59a79b306af2c-1-1\"  class=\"panel-grid-cell panel-grid-cell-mobile-last\" ><div id=\"panel-w59a79b306af2c-1-1-0\" class=\"so-panel widget widget_text panel-first-child panel-last-child\" data-index=\"1\" >\t\t\t<div class=\"textwidget\"><p><iframe src=\"https:\/\/player.vimeo.com\/video\/21999779?autoplay=1&#038;byline=0&#038;portrait=0\" frameborder=\"0\" webkitallowfullscreen mozallowfullscreen allowfullscreen><\/iframe><\/p>\n<hr \/>\n<\/div>\n\t\t<\/div><\/div><div id=\"pgc-w59a79b306af2c-1-2\"  class=\"panel-grid-cell panel-grid-cell-empty\" ><\/div><\/div><div id=\"pg-w59a79b306af2c-2\"  class=\"panel-grid panel-no-style\" ><div id=\"pgc-w59a79b306af2c-2-0\"  class=\"panel-grid-cell\" ><div id=\"panel-w59a79b306af2c-2-0-0\" class=\"so-panel widget widget_text panel-first-child panel-last-child\" data-index=\"2\" >\t\t\t<div class=\"textwidget\"><p>the video above documents a large 2-pendulum harmonograph constructed by danish artist eske rex&#8230;<\/p>\n<p>here, the perpendicular pen arms are attached to the pendulum bob, which allows the drawing surface to be close to the ground&#8230;<\/p>\n<p>cast concrete weights are used to vary the periodic relationship between the two pendulums&#8230;<\/p>\n<p><a href=\"http:\/\/www.eskerex.com\/?p=1497\" target=\"_blank\" rel=\"noopener\">more info about eske rex&#8217;s &#8216;drawing machine 02&#8217; at the artist&#8217;s website here<\/a><\/p>\n<hr \/>\n<\/div>\n\t\t<\/div><\/div><\/div><div id=\"pg-w59a79b306af2c-3\"  class=\"panel-grid panel-no-style\" ><div id=\"pgc-w59a79b306af2c-3-0\"  class=\"panel-grid-cell\" ><div id=\"panel-w59a79b306af2c-3-0-0\" class=\"so-panel widget widget_sow-image panel-first-child\" data-index=\"3\" ><div\n\t\t\t\n\t\t\tclass=\"so-widget-sow-image so-widget-sow-image-default-c67d20f9f743\"\n\t\t\t\n\t\t>\n<div class=\"sow-image-container\">\n\t\t<img \n\tsrc=\"https:\/\/www.drawingmachines.net\/wp-content\/uploads\/2015\/05\/2pend_fixedpaper-e1503895698490.jpg\" width=\"600\" height=\"450\" sizes=\"(max-width: 600px) 100vw, 600px\" title=\"2pend_fixedpaper\" alt=\"\" \t\tclass=\"so-widget-image\"\/>\n\t<\/div>\n\n<\/div><\/div><div id=\"panel-w59a79b306af2c-3-0-1\" class=\"so-panel widget widget_text\" data-index=\"4\" >\t\t\t<div class=\"textwidget\"><p>the example above has a fixed drawing table, with perpendicular pendulums driving the pen&#8230;<\/p>\n<p>here, the pendulum fulcrum is a dowel rod seated in a groove which will create friction that will more quickly dissipate the system&#8217;s energy&#8230;<\/p>\n<p>friction should be reduced wherever possible in the mechanism&#8230;<\/p>\n<hr>\n<\/div>\n\t\t<\/div><div id=\"panel-w59a79b306af2c-3-0-2\" class=\"so-panel widget widget_sow-image\" data-index=\"5\" ><div\n\t\t\t\n\t\t\tclass=\"so-widget-sow-image so-widget-sow-image-default-c67d20f9f743\"\n\t\t\t\n\t\t>\n<div class=\"sow-image-container\">\n\t\t<img \n\tsrc=\"https:\/\/www.drawingmachines.net\/wp-content\/uploads\/2015\/05\/XHENSILAzemblaku_2P_movngpaper.jpg\" width=\"499\" height=\"850\" srcset=\"https:\/\/www.drawingmachines.net\/wp-content\/uploads\/2015\/05\/XHENSILAzemblaku_2P_movngpaper.jpg 499w, https:\/\/www.drawingmachines.net\/wp-content\/uploads\/2015\/05\/XHENSILAzemblaku_2P_movngpaper-176x300.jpg 176w, https:\/\/www.drawingmachines.net\/wp-content\/uploads\/2015\/05\/XHENSILAzemblaku_2P_movngpaper-88x150.jpg 88w, https:\/\/www.drawingmachines.net\/wp-content\/uploads\/2015\/05\/XHENSILAzemblaku_2P_movngpaper-400x681.jpg 400w\" sizes=\"(max-width: 499px) 100vw, 499px\" alt=\"\" \t\tclass=\"so-widget-image\"\/>\n\t<\/div>\n\n<\/div><\/div><div id=\"panel-w59a79b306af2c-3-0-3\" class=\"so-panel widget widget_text panel-last-child\" data-index=\"6\" >\t\t\t<div class=\"textwidget\"><p><a href=\"https:\/\/vimeo.com\/17869559\" target=\"_blank\" rel=\"noopener\"> this 45 secs video<\/a> documents the example of a two pendulum harmonograph above, built by xhensila zemblaku&#8230;<\/p>\n<p>this design has a moving surface and a moving pen &#8211; note that the pendulums linear trajectories are perpendicular to each other&#8230;<\/p>\n<hr>\n<\/div>\n\t\t<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"\n<p>either a fixed or moving drawing surface\u2026<\/p>\n<\/p>\n<p>the video above documents a large 2-pendulum harmonograph constructed by danish artist eske rex&#8230;<\/p>\n<p>here, the perpendicular pen arms are attached to the pendulum bob, which allows the drawing surface to be close to the ground&#8230;<\/p>\n<p>cast concrete weights are used to vary the periodic relationship [&#8230;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-295","page","type-page","status-publish","hentry","odd"],"_links":{"self":[{"href":"https:\/\/www.drawingmachines.net\/index.php?rest_route=\/wp\/v2\/pages\/295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.drawingmachines.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.drawingmachines.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.drawingmachines.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.drawingmachines.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=295"}],"version-history":[{"count":39,"href":"https:\/\/www.drawingmachines.net\/index.php?rest_route=\/wp\/v2\/pages\/295\/revisions"}],"predecessor-version":[{"id":412,"href":"https:\/\/www.drawingmachines.net\/index.php?rest_route=\/wp\/v2\/pages\/295\/revisions\/412"}],"wp:attachment":[{"href":"https:\/\/www.drawingmachines.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}