{"id":2076,"date":"2019-04-28T20:35:36","date_gmt":"2019-04-28T18:35:36","guid":{"rendered":"https:\/\/fablab-montagny-pres-louhans.fr\/?p=2076"},"modified":"2019-04-28T20:35:38","modified_gmt":"2019-04-28T18:35:38","slug":"fraiseuse-numerique-acte-2","status":"publish","type":"post","link":"https:\/\/fablab-montagny-pres-louhans.fr\/index.php\/2019\/04\/28\/fraiseuse-numerique-acte-2\/","title":{"rendered":"Fraiseuse num\u00e9rique &#8211; acte 2"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1601\" height=\"1200\" src=\"https:\/\/i2.wp.com\/www.labo-m.club\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1532.jpg?fit=843%2C632\" alt=\"\" class=\"wp-image-2077\" srcset=\"https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1532.jpg 1601w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1532-300x225.jpg 300w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1532-768x576.jpg 768w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1532-1024x768.jpg 1024w\" sizes=\"(max-width: 1601px) 100vw, 1601px\" \/><figcaption>Un dessin un peu plus complexe. Encore bien imparfait (trop creus\u00e9, trop lent&#8230;<\/figcaption><\/figure>\n\n\n\n<p>Ce nouvel essai visait \u00e0 graver un dessin complexe, mais toujours sans relief \u00e0 partir d&rsquo;une image en noir et blanc.<\/p>\n\n\n\n<p>La d\u00e9marche consiste \u00e0 vectoriser une image en noir et blanc, puis la transformer en GCode qui pourra \u00eatre interpr\u00e9t\u00e9 par le logiciel de fraisage.<\/p>\n\n\n\n<p>Etape 1 : Vectorisation d&rsquo;une image noir et blanc.<br><br>Pourquoi vectoriser une image ? Mon appareil photo utilise des formats d&rsquo;images en point par point (matriciel). Si vous observez de pr\u00e8s ou utilisez la fonction loupe pour ausculter votre photo, cela se terminera toujours de la m\u00eame mani\u00e8re : une s\u00e9rie de carr\u00e9s color\u00e9s sans grand sens. De m\u00eame si vous observez de pr\u00e8s votre t\u00e9l\u00e9viseur avec une loupe vous verrez des points qui constituent l&rsquo;image<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"759\" height=\"742\" src=\"https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/detail-tete-dot.jpg\" alt=\"\" class=\"wp-image-2079\" srcset=\"https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/detail-tete-dot.jpg 759w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/detail-tete-dot-300x293.jpg 300w\" sizes=\"(max-width: 759px) 100vw, 759px\" \/><figcaption>d\u00e9tail d&rsquo;une image en noir et blanc de type point (bitmap) <br><br><\/figcaption><\/figure>\n\n\n\n<p>Avantage de l&rsquo;image vectoris\u00e9e, l&rsquo;image reste lisse quelque soit son agrandissement. On part d&rsquo;un point avec une direction et une force qui lui sont attribu\u00e9s. Les vecteurs forment des chemins lisses (sans marches d&rsquo;escalier). C&rsquo;est le format id\u00e9al pour agrandir potentiellement \u00e0 l&rsquo;infini une image de type logo ou pour d\u00e9placer un outil de fraisage ou de coupe. <br>Les loisirs cr\u00e9atifs l&rsquo;utilisent souvent coupl\u00e9 avec la \u00ab\u00a0silhouette cameo\u00a0\u00bb.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"883\" height=\"811\" src=\"https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/detail-tete-vecto.jpg\" alt=\"\" class=\"wp-image-2080\" srcset=\"https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/detail-tete-vecto.jpg 883w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/detail-tete-vecto-300x276.jpg 300w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/detail-tete-vecto-768x705.jpg 768w\" sizes=\"(max-width: 883px) 100vw, 883px\" \/><figcaption>d\u00e9tail de la m\u00eame image vectoris\u00e9e<\/figcaption><\/figure>\n\n\n\n<p>Nous allons donc vectoriser avec Inkscape qui est un outil libre et gratuit. Puis enregistrer vers un format vectoriel compatible avec le logiciel de g\u00e9n\u00e9ration de GCode. Nous retiendrons le format SVG. Pour un export vers le graveur laser nous aurions utilis\u00e9 au format DXF.<\/p>\n\n\n\n<p>Etape 2 : G\u00e9n\u00e9ration du GCode<\/p>\n\n\n\n<p>Le GCode est un langage simplifi\u00e9 permettant pour la principale fonction de d\u00e9placer l&rsquo;outil de fraisage sur la pi\u00e8ce \u00e0 usiner en pr\u00e9cisant la destination \u00e0 l&rsquo;aide de coordonn\u00e9es cart\u00e9siennes. Le GCode est presque commun \u00e0 nos imprimantes 3D. Il diff\u00e8re dans des fonctions sp\u00e9cifiques \u00e0 l&rsquo;une ou l&rsquo;autre des machines (Par exemple la fraiseuse aura besoin de s\u00e9lectionner un outil ou de faire tourner la broche \u00e0 une certaine vitesse, de son c\u00f4t\u00e9, l&rsquo;imprimante 3D aura besoin de faire chauffer la t\u00eate ou de pousser le filament \u00e0 une certaine vitesse).<\/p>\n\n\n\n<p>Le logiciel utilis\u00e9 en ligne est suffisant pour cette premi\u00e8re approche. <a href=\"http:\/\/www.makercam.com\/\">http:\/\/www.makercam.com\/<\/a><\/p>\n\n\n\n<p>Nous allons demander au logiciel de suivre un chemin, sur, \u00e0 l&rsquo;int\u00e9rieur ou \u00e0 l&rsquo;ext\u00e9rieur suivant l&rsquo;effet recherch\u00e9 (d\u00e9coupe ou gravure). Nous allons aussi lui pr\u00e9ciser quel sera l&rsquo;outil utilis\u00e9, ses dimensions, son r\u00f4le, la profondeur de coupe, sa vitesse de coupe, la hauteur qu&rsquo;il devra enlever \u00e0 chaque passage. C&rsquo;est l&rsquo;ensemble de ces param\u00e8tres qui d\u00e9pendent de la mati\u00e8re usin\u00e9e et qui \u00e9viteront casse, \u00e9chauffement ou rendu m\u00e9diocre. C&rsquo;est la partie la plus \u00ab\u00a0pro\u00a0\u00bb de l&rsquo;op\u00e9ration. <br>J&rsquo;ai choisi la s\u00e9curit\u00e9 avec une vitesse de d\u00e9placement faible (150mm\/min), et une p\u00e9n\u00e9tration minimale (passe maximale de 1.5mm) dans un mat\u00e9riau tendre (bois type sapin). J&rsquo;en ai aussi profit\u00e9 pour tester un passage double pour descendre \u00e0 2mm de profondeur au final. <br><br>Si je devais refaire cette gravure, je me contenterai d&rsquo;une passe simple (1mm au total), plus rapide (300mm\/min ou plus) et moins profonde (1 mm au final). L&rsquo;outil utilis\u00e9 \u00e9tait une petite pointe triangulaire tr\u00e8s pointue, une fraise moins pointue aurait \u00e9t\u00e9 pr\u00e9f\u00e9rable pour marquer plus nettement les chemins.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1675\" height=\"893\" src=\"https:\/\/i2.wp.com\/www.labo-m.club\/wp-content\/uploads\/2019\/04\/makercam.jpg?fit=843%2C449\" alt=\"\" class=\"wp-image-2083\" srcset=\"https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/makercam.jpg 1675w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/makercam-300x160.jpg 300w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/makercam-768x409.jpg 768w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/makercam-1024x546.jpg 1024w\" sizes=\"(max-width: 1675px) 100vw, 1675px\" \/><figcaption>Le d\u00e9placement de l&rsquo;outil est mat\u00e9rialis\u00e9 en bleu (sens et trac\u00e9). Ici sur une version simplifi\u00e9e.<\/figcaption><\/figure>\n\n\n\n<p>Le GCode est g\u00e9n\u00e9r\u00e9 puis export\u00e9 sous forme d&rsquo;un fichier texte<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1063\" height=\"603\" src=\"https:\/\/i0.wp.com\/www.labo-m.club\/wp-content\/uploads\/2019\/04\/GCode-exemple.jpg?fit=843%2C478\" alt=\"\" class=\"wp-image-2084\" srcset=\"https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/GCode-exemple.jpg 1063w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/GCode-exemple-300x170.jpg 300w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/GCode-exemple-768x436.jpg 768w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/GCode-exemple-1024x581.jpg 1024w\" sizes=\"(max-width: 1063px) 100vw, 1063px\" \/><figcaption>exemple de GCode<\/figcaption><\/figure>\n\n\n\n<p>Etape 3 : Usinage<\/p>\n\n\n\n<p>Au final, le GCode est int\u00e9gr\u00e9 dans le logiciel de contr\u00f4le de la fraiseuse : MACH 3. Il faudra encore tester les d\u00e9placements, positionner le mat\u00e9riau \u00e0 usiner, r\u00e9gler l&rsquo;outil en affleurement de la surface au bon point de d\u00e9part puis patienter&#8230;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1601\" height=\"1200\" src=\"https:\/\/i0.wp.com\/www.labo-m.club\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1531.jpg?fit=843%2C632\" alt=\"\" class=\"wp-image-2082\" srcset=\"https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1531.jpg 1601w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1531-300x225.jpg 300w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1531-768x576.jpg 768w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1531-1024x768.jpg 1024w\" sizes=\"(max-width: 1601px) 100vw, 1601px\" \/><figcaption>Finalement pour un premier jet c&rsquo;est pas si mal.<\/figcaption><\/figure>\n\n\n\n<p>Question : Est ce de la 2D (plat) ou de la 3D (relief) ? La r\u00e9ponse est subtile et presque Normande&#8230; \ud83d\ude09 <\/p>\n\n\n\n<p>Je vous laisse y r\u00e9fl\u00e9chir.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<p>Autres tests rapides du jour :<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1601\" height=\"1200\" src=\"https:\/\/i1.wp.com\/www.labo-m.club\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1535.jpg?fit=843%2C632\" alt=\"\" class=\"wp-image-2085\" srcset=\"https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1535.jpg 1601w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1535-300x225.jpg 300w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1535-768x576.jpg 768w, https:\/\/fablab-montagny-pres-louhans.fr\/wp-content\/uploads\/2019\/04\/copie-0_IMG_1535-1024x768.jpg 1024w\" sizes=\"(max-width: 1601px) 100vw, 1601px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio wp-embed-aspect-16-9\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"fraisage episode 2\" width=\"1080\" height=\"608\" src=\"https:\/\/www.youtube.com\/embed\/pUu42Kzrb1U?feature=oembed\"  allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Ce nouvel essai visait \u00e0 graver un dessin complexe, mais toujours sans relief \u00e0 partir d&rsquo;une image en noir et blanc. La d\u00e9marche consiste \u00e0 vectoriser une image en noir et blanc, puis la transformer en GCode qui pourra \u00eatre interpr\u00e9t\u00e9 par le logiciel de fraisage. Etape 1 : Vectorisation d&rsquo;une image noir et blanc. [&hellip;]<\/p>\n","protected":false},"author":31,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":{"facebook_1992431424458146_173380702515979":""},"rop_publish_now_history":[],"rop_publish_now_status":"pending","footnotes":""},"categories":[2],"tags":[],"class_list":["post-2076","post","type-post","status-publish","format-standard","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fraiseuse num\u00e9rique - acte 2 - Le FabLab<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fraiseuse num\u00e9rique - acte 2 - Le FabLab\" \/>\n<meta property=\"og:description\" content=\"Ce nouvel essai visait \u00e0 graver un dessin complexe, mais toujours sans relief \u00e0 partir d&rsquo;une image en noir et blanc. La d\u00e9marche consiste \u00e0 vectoriser une image en noir et blanc, puis la transformer en GCode qui pourra \u00eatre interpr\u00e9t\u00e9 par le logiciel de fraisage. Etape 1 : Vectorisation d&rsquo;une image noir et blanc. 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