{"id":10,"date":"2020-03-12T14:39:26","date_gmt":"2020-03-12T14:39:26","guid":{"rendered":"https:\/\/www.3dprint-italia.it\/WP\/2020\/03\/12\/microswitch-e-end-stop\/"},"modified":"2024-05-29T18:41:13","modified_gmt":"2024-05-29T17:41:13","slug":"microswitch-e-end-stop","status":"publish","type":"page","link":"https:\/\/www.3dprint-italia.it\/WP\/microswitch-e-end-stop\/","title":{"rendered":"Microswitch e END-Stop"},"content":{"rendered":"<div class=\"postrow\">\n<h2 class=\"title icon\">\u00a0In questa occasione provero&#8217; a spiegarvi il funzionamento principale di tre tipi di microswitch (finecorsa)<\/h2>\n<div class=\"content\">\n<div id=\"post_message_114\">\n<blockquote class=\"postcontent restore \"><p>&#8211; Microswitch Coumuni (per esempio quelli montati sulle Anet e altre stampanti comuni)<br \/> &#8211; Microswitch con Led (per esempio quelli montati sulle schede Ramps)<br \/> &#8211; Microswitch Ottici (per esempio quelli montati sulle schede Lerdge)<\/p><\/blockquote>\n<blockquote class=\"postcontent restore \"><p> <img loading=\"lazy\" decoding=\"async\" class=\" size-full wp-image-7\" src=\"https:\/\/www.3dprint-italia.it\/WP\/wp-content\/uploads\/2020\/03\/InkedMicroswitch_LI.jpg\" alt=\"\" width=\"394\" height=\"351\" srcset=\"https:\/\/www.3dprint-italia.it\/WP\/wp-content\/uploads\/2020\/03\/InkedMicroswitch_LI.jpg 440w, https:\/\/www.3dprint-italia.it\/WP\/wp-content\/uploads\/2020\/03\/InkedMicroswitch_LI-300x267.jpg 300w\" sizes=\"auto, (max-width: 394px) 100vw, 394px\" \/><\/p>\n<p> I microswitch comuni hanno <b>3 pin<\/b>, <b>&#8220;C&#8221;<\/b>, <b>&#8220;NO&#8221;<\/b>, <b>&#8220;NC&#8221;<\/b><br \/> Di solito sono collegati da due fili, uno rosso e uno nero.<br \/> Erroneamente questo spesso fa pensare che abbiano una polarit\u00e0 positiva e negativa.<br \/> Questi microswitch <b>NON<\/b> hanno alcun tipo di polarit\u00e0, si limitano solo ad interrompere un passaggio di corrente di un filo.<br \/> Immaginiamo di avere un filo positivo oppure negativo, di tagliarlo in due e di unire una delle due estremit\u00e0 all&#8217;altro capo con le mani.<br \/> Interromperemo il passaggio di corrente allontanandoli oppure permetteremo il passaggio facendoli toccare insieme.<br \/> Ecco questo tipo di switch non fa altro che questo.<br \/> Ha tre pin, il pin <b>&#8220;C&#8221;<\/b> \u00e8 il pin &#8220;Comune&#8221;, il pin <b>&#8220;NO&#8221;<\/b> \u00e8 il pin Normalmente Aperto e in fine il pin <b>&#8220;NC&#8221;<\/b> \u00e8 il pin Normalmente Chiuso.<br \/> A dipendenza da come ci serve il circuito potremmo voler scegliere una o l&#8217;altra configurazione.<br \/> Un filo andr\u00e0 sempre collegato al pin <b>&#8220;C&#8221;<\/b>, se collegheremo l&#8217;altro filo per es. a <b>&#8220;NC&#8221;<\/b>, avremmo un collegamento Normalmente chiuso,<br \/> questo significa che la corrente continuer\u00e0 a passare ma quando premeremo la levetta, il passaggio verr\u00e0 interrotto.<br \/> Al contrario se collegassimo il filo al pin <b>&#8220;NO&#8221;<\/b> avremmo un collegamento aperto, non passer\u00e0 la corrente fino a quando non premeremo la levetta.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" size-full wp-image-8\" src=\"https:\/\/www.3dprint-italia.it\/WP\/wp-content\/uploads\/2020\/03\/Finecorsa_Ramps.jpg\" alt=\"\" width=\"607\" height=\"459\" srcset=\"https:\/\/www.3dprint-italia.it\/WP\/wp-content\/uploads\/2020\/03\/Finecorsa_Ramps.jpg 649w, https:\/\/www.3dprint-italia.it\/WP\/wp-content\/uploads\/2020\/03\/Finecorsa_Ramps-300x227.jpg 300w\" sizes=\"auto, (max-width: 607px) 100vw, 607px\" \/><br \/> Gli switch <b>Ramps<\/b> invece hanno una polarit\u00e0 poich\u00e9 utilizzano un led che si accende quando premeremo la levetta.<br \/> Avremo un filo <b><span style=\"color: #ff0000;\">Rosso<\/span><\/b> + e un filo <b>Nero<\/b> &#8211; e adipendenza dal cavo potremmo avere un filo <b><span style=\"color: #ffd700;\">Giallo<\/span><\/b> oppure <b><span style=\"color: #00ff00;\">Verde<\/span><\/b>.<br \/> Ovviamente al filo <b><span style=\"color: #ff0000;\">Rosso<\/span><\/b> andr\u00e0 collegato il <b>+5v<\/b> e al filo <b>Nero<\/b> la massa. Il filo <b><span style=\"color: #ffd700;\">Giallo<\/span><\/b> o <b><span style=\"color: #00ff00;\">Verde<\/span><\/b> sar\u00e0 il filo che interromper\u00e0 il passaggio di corrente.<br \/> In questo caso la configurazione Normalmente aperto o Normalmente chiuso verr\u00e0 fatta e impostata <u><b>esclusivamente da firmware<\/b><\/u>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" size-full wp-image-9\" src=\"https:\/\/www.3dprint-italia.it\/WP\/wp-content\/uploads\/2020\/03\/SwitchOttico.jpg\" alt=\"\" width=\"549\" height=\"354\" srcset=\"https:\/\/www.3dprint-italia.it\/WP\/wp-content\/uploads\/2020\/03\/SwitchOttico.jpg 599w, https:\/\/www.3dprint-italia.it\/WP\/wp-content\/uploads\/2020\/03\/SwitchOttico-300x193.jpg 300w\" sizes=\"auto, (max-width: 549px) 100vw, 549px\" \/><br \/> In fine abbiamo Gli switch ottici, anche questi hanno una polarit\u00e0 Positiva e Negativa e un filo per il segnale.<br \/> &#8211; a <b><span style=\"color: #ff0000;\">VCC<\/span><\/b> andranno collegati i +5v mentre a <b>GND<\/b> andr\u00e0 collegata la massa. Il pin <b><span style=\"color: #ffff00;\">&#8220;SIG&#8221;<\/span><\/b> sar\u00e0 quello che interromper\u00e0 o far\u00e0 passare la corrente.<br \/> A differenza degli altri due switch, questi non hanno una levetta ma nel mezzo delle due parti <b>A<\/b> e <b>B<\/b> ci sar\u00e0 un emettitore infrarosso e all&#8217;altro capo un ricevitore.<br \/> Se nel mezzo del punto <b>A<\/b> e del punto <b>B<\/b> inserissimo un qualsiasi tipo di oggetto, il flusso di &#8220;luce&#8221; verrebbe interrotto, azionando cosi il passaggio o l&#8217;interruzione di corrente.<br \/> In pratica si comporterebbe come la classica levetta.<br \/> Anche in questo caso, per configurarlo Normalmente Aperto o Normalmente Chiuso lo si potr\u00e0 fare <b><u>solo da Firmware<\/u><\/b>.<\/p>\n<p> <b><span style=\"color: #ff0000;\">Alcune stampanti non hanno degli interruttori di fine corsa, il fine corsa viene rilevato direttamente dai motori quando incontreranno una certa resistenza.<\/span><\/b><\/p><\/blockquote>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0In questa occasione provero&#8217; 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