{"id":192,"date":"2014-12-16T14:37:07","date_gmt":"2014-12-16T13:37:07","guid":{"rendered":"http:\/\/ok2haz.ok2kld.cz\/ok2haz\/?p=192"},"modified":"2019-03-11T10:09:10","modified_gmt":"2019-03-11T09:09:10","slug":"moje-prvni-cnc","status":"publish","type":"post","link":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/2014\/12\/moje-prvni-cnc\/","title":{"rendered":"Moje prvn\u00ed CNC"},"content":{"rendered":"

P\u0159i tvorb\u011b plo\u0161n\u00fdch spoj\u016f, p\u0159edn\u00edch panel\u016f p\u0159\u00edstroj\u016f a dal\u0161\u00ed jemn\u00e9 mechaniky jsem st\u00e1le \u010dast\u011bji nar\u00e1\u017eel na probl\u00e9m kde sehnat dostate\u010dn\u011b p\u0159esnou vrta\u010dku, jak ji uchytit atd…m\u011b\u0159en\u00ed nebo automatick\u00fd pohyb byl jen sen. Pomoc\u00ed 3D tisk\u00e1rny jsem si za\u010dal stav\u011bt support pro model\u00e1\u0159skou mikrovrta\u010dku. To bylo v z\u00e1\u0159\u00ed 2014.<\/p>\n

\"OLYMPUS<\/a> \"OLYMPUS<\/a><\/p>\n

B\u011bhem stavby jsem na\u0161el na youtube n\u011bjak\u00e1 videa kde je pou\u017eito mal\u00e9 CNC pro fr\u00e9zov\u00e1n\u00ed PCB, nebo jako sou\u0159adnicov\u00e1 vrta\u010dka. A p\u0159e\u0161el jsem k druh\u00e9mu konceptu:) Mikro CNC<\/strong>.<\/p>\n

Po\u010d\u00e1te\u010dn\u00ed rozpo\u010det byl stanoven na cca 16tis korun. V\u00fdsledkem potom CNC stroj schopn\u00fd fr\u00e9zovat PCB, \u010dela p\u0159\u00edstroj\u016f a dals\u00ed jemn\u00e9 d\u00edly z hlin\u00edku, mosazi a m\u011bk\u010d\u00edch. P\u0159esost polohov\u00e1n\u00ed by m\u011bla b\u00fdt lep\u0161\u00ed ne\u017e 0,05 mm<\/p>\n

\u010c\u00e1stky budu specifikovat pr\u016fb\u011b\u017en\u011b v textu…<\/p>\n

Z\u00e1kladn\u00ed konstrukce vych\u00e1z\u00ed z potr\u00e1lov\u00fdch stroj\u016f a Rebel II. Hlin\u00edkov\u00e9 profily jsou d\u00edky roz\u0161\u00ed\u0159en\u00ed 3D tisku relativn\u011b levn\u00e9. Bohu\u017eel v\u0161ak jen z\u00e1kladn\u00ed typ 40x40mm. Podstava je vyztuzena hlin\u00edkov\u00fdm plechem tlou\u0161\u0165ky 3mm.<\/p>\n

\"2\"<\/a> \"3\"<\/a><\/p>\n

Pro pojezd osy y jsem pou\u017eil podep\u0159en\u00e9 ty\u010de 2x \u00f816mm d\u00e9lka 500mm (SBR-16) s otev\u0159en\u00fdm line\u00e1rn\u00edm lo\u017eiskov\u00fdm setem SMA-16.<\/p>\n

D\u016fle\u017eit\u00e1 je tak\u00e9 volba pohon\u016f os, v 3D tisk\u00e1rn\u00e1ch se kv\u016fli vysol\u00e9 dynamice pohyb\u016f pou\u017e\u00edvaj\u00ed ozuben\u00e9 \u0159emeny, ty se v\u0161ak pro CNC ur\u010dit\u011b nehod\u00ed (pominu-li pick&place ma\u0161inky). Klasick\u00e9 metrick\u00e9 z\u00e1vitov\u00e9 ty\u010de se stop\u00e1n\u00edm 1mm nemaj\u00ed pot\u0159ebnou p\u0159esnost ani dynamiku. Trap\u00e9zov\u00e9 \u0161rouby zase trp\u00ed v\u016fl\u00ed a p\u0159i mal\u00fdch ro\u017em\u011brech a mal\u00fdch sil\u00e1ch jsou tak\u00e9 neperspektivn\u00ed. Volba nakonec padla na kuli\u010dkov\u00e9 \u0161rouby, nemaj\u00ed v\u016fli (backlash) a maj\u00ed naopak vysokou \u00fa\u010dinnost. Cena 700k\u010d (kuli\u010dkov\u00fd \u0161roub 1605 + matice) je snesiteln\u00e1. K fixov\u00e1n\u00ed z\u00e1vit\u016f pou\u017e\u00edv\u00e1m lepidlo CEYS.<\/p>\n

\"1\"<\/a><\/p>\n

\u0158\u00edd\u00edc\u00ed elektroniku jsem sehnal na ebay za 50,- USD. Elektronika pou\u017e\u00edv\u00e1 obvod TB6560,  jen\u00e1 se o speci\u00e1n\u00ed driver pro dvouf\u00e1zov\u00e9 krokov\u00e9 motory. Maxim\u00e1ln\u00ed zat\u011b\u017eovc\u00ed proud je 3,5A, m\u016f\u017ee krokovat a\u017e 1\/16 standardn\u00edho kroku. Tak\u017ee celkov\u00fd po\u010det mikrokrok\u016f dvojf\u00e1z. motoru(200×16) je 3200. P\u0159i stoup\u00e1n\u00ed kuli\u010dkov\u00fdch \u0161roub\u016f 5mm\/z\u00e1vit vych\u00e1z\u00ed teoreticky jeden mikrokrok posuvu na 1,5625mm. \u0158\u00edd\u00edc\u00ed SW (v m\u00e9m p\u0159\u00edpade MACH3) stejn\u011b kroky zaokrouhluje, pevnost konstrukce vnese tak\u00e9 chybu. M\u016fj odhad na po\u010d\u00e1tku bylo u\u017eite\u010dn\u00e9 krokov\u00e1n\u00ed po 0,02mm (128 mikrokrok\u016f). TB6560 je ovl\u00e1d\u00e1n t\u0159emi bity: Enable, Dir, Step (Zapni, Sm\u011br, Krok). Dal\u0161\u00ed parametry jako je v\u00fdstupn\u00ed proud, mikro-krokov\u00e1n\u00ed a decay se nastav\u00ed pomoc\u00ed switch\u016f na desce. Krokov\u00e9 motory jsou typu Nema23.<\/p>\n

\"3\"<\/a> \"4\"<\/a> \"5\"<\/a> \"6\"<\/a><\/p>\n

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Za\u010d\u00e1tkem ledna 2015 vypad\u00e1 stavba takto:<\/p>\n

Osy x,y jsou poh\u00e1n\u011bny kul. \u0161rouby 16x5mm.<\/p>\n

\"CNC_Leden_2015\"<\/a><\/p>\n

\"\"<\/a>

Detail pojezdu osy Z<\/p><\/div>\n

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\"2\"<\/a>

Detail koncov\u00e9ho sp\u00edna\u010de<\/p><\/div>\n

\"1\"<\/a>

Pohled na dokon\u010denou fr\u00e9zku – 16.2.2015<\/p><\/div>\n

Fr\u00e9zka splnila o\u010dek\u00e1v\u00e1n\u00ed, nicm\u00e9n\u011b m\u00e1 tak\u00e9 \u0159adu nedokonalost\u00ed. Ty sice pro m\u016fj \u00fa\u010del pou\u017eit\u00ed a\u017e tak nevad\u00ed ale v budoucnu je budu muset \u0159e\u0161it.<\/p>\n

Jako nejv\u011bt\u0161\u00ed nedostatek hodnot\u00edm tuhost osy X, m\u011bl jsem pou\u017e\u00edt vod\u00edc\u00ed ty\u010de \u220516mm a ne 8mm. Tak\u017ee to bude prvn\u00ed upgrade. Nesm\u00edme ale zapomenout \u017ee se st\u00e1le bav\u00edme o stroji s n\u00e1klady pod 15.000,- K\u010d a \u017ee vod\u00edc\u00edch ty\u010d\u00ed \u22058mm m\u00e1m dostatek ze stavby p\u0159edchoz\u00edch 3D tisk\u00e1ren.<\/p>\n

Te\u010f zb\u00fdv\u00e1 do\u0159e\u0161it v\u00fd\u0161kov\u00e9 mapov\u00e1n\u00ed (osa Z) p\u0159i fr\u00e9zov\u00e1n\u00ed DPS…<\/p>\n

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P\u0159i tvorb\u011b plo\u0161n\u00fdch spoj\u016f, p\u0159edn\u00edch panel\u016f p\u0159\u00edstroj\u016f a dal\u0161\u00ed jemn\u00e9 mechaniky jsem st\u00e1le \u010dast\u011bji nar\u00e1\u017eel na probl\u00e9m kde sehnat dostate\u010dn\u011b p\u0159esnou vrta\u010dku, jak ji uchytit atd…m\u011b\u0159en\u00ed nebo automatick\u00fd pohyb byl jen sen. Pomoc\u00ed 3D tisk\u00e1rny jsem si za\u010dal stav\u011bt support Pokra\u010duj ve \u010dten\u00ed \u2192<\/a><\/p>\n","protected":false},"author":1,"featured_media":3297,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[92,49,43,76,47,45],"class_list":["post-192","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cnc","tag-cnc","tag-diy-cnc","tag-drilling","tag-my-first-cnc","tag-pcb-engravier","tag-pcb-milling"],"_links":{"self":[{"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/posts\/192","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/comments?post=192"}],"version-history":[{"count":29,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/posts\/192\/revisions"}],"predecessor-version":[{"id":3370,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/posts\/192\/revisions\/3370"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/media\/3297"}],"wp:attachment":[{"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/media?parent=192"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/categories?post=192"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/tags?post=192"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}