{"id":19905,"date":"2019-07-16T00:00:00","date_gmt":"2019-07-16T00:00:00","guid":{"rendered":"https:\/\/www.mailgun.com\/blog\/maquina-de-entrega-de-snacks-parte-1-mecanica\/"},"modified":"2026-09-14T18:32:33","modified_gmt":"2026-09-14T18:32:33","slug":"maquina-de-entrega-de-snacks-parte-1-mecanica","status":"publish","type":"blog","link":"https:\/\/www.mailgun.com\/es\/blog\/dev-life\/maquina-de-entrega-de-snacks-parte-1-mecanica\/","title":{"rendered":"M\u00e1quina de entrega de snacks: parte 1, la mec\u00e1nica"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Trastear con el hardware siempre es divertido y\u00a0<a href=\"\/?blog_category=mission-to-mars-pycon-2014\" target=\"_tabs\" rel=\"noopener noreferrer\">hac\u00eda tiempo<\/a>\u00a0 que no cre\u00e1bamos nada! En esta breve serie de art\u00edculos del blog, vamos a fabricar una m\u00e1quina de snacks controlada por email utilizando un dispensador de alimentos secos, una Raspberry Pi, un par de motores paso a paso y un poco de impresi\u00f3n 3D.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esta publicaci\u00f3n se centrar\u00e1 primero en la mec\u00e1nica y luego continuaremos con la electr\u00f3nica en la segunda parte.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00bfListo? \u00a1Vamos all\u00e1!<\/p>\n\n\n\r\n    <nav data-content-type=\"longform\" class=\"toc-block longform-spacings px-5 py-6 px-md-6 px-lg-7 py-md-7 bg-light fs-sm rounded-lg\" aria-labelledby=\"toc-title-8300\"><p class=\"h5 m-0\" id=\"toc-title-8300\">\u00cdndice<\/p><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">01<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#preparacion-de-los-componentes\">Preparaci\u00f3n de los componentes<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">02<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#diseno-de-la-transmision\">Dise\u00f1o de la transmisi\u00f3n<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">03<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#mejorandolo-todo-con-una-dremel\">Mejor\u00e1ndolo todo con una Dremel<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">04<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#ensamblaje-final\">Ensamblaje final<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">05<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#muy-interesante-verdad\">Muy interesante, \u00bfverdad?<\/a><\/div><\/div><\/nav>\n\n\n<h2 class=\"wp-block-heading\">Preparaci\u00f3n de los componentes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Empezamos con un dispensador de snacks que puedes encontrar en cualquier gran almac\u00e9n o por internet. Si tienes curiosidad por saber de d\u00f3nde sacamos el nuestro, lo compramos en\u00a0<a href=\"https:\/\/www.amazon.com\/gp\/product\/B00013K8OO\/\" target=\"_tabs\" rel=\"noopener noreferrer\">Amazon<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-3997\" width=\"700\" height=\"1244\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dispenser_init-700x1244-1.png\" alt=\"Picture of a snack dispenser\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dispenser_init-700x1244-1.png 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dispenser_init-700x1244-1-169x300.png 169w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dispenser_init-700x1244-1-576x1024.png 576w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Es una m\u00e1quina bastante sencilla: las golosinas se cargan por la parte superior y se puede girar la manivela para dispensarlas en un cuenco situado debajo. Pero \u00bfy si le a\u00f1adimos motores al mecanismo dispensador? Entran en escena los motores, es decir, dos motores paso a paso NEMA 17 de 12 V. Utilizamos un par de\u00a0<a href=\"https:\/\/www.adafruit.com\/product\/324\" target=\"_tabs\" rel=\"noopener noreferrer\">estos<\/a>, pero aprendimos por las malas que a la m\u00e1quina le viene bien un poco m\u00e1s de par que 0,2 Nm.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4009\" width=\"700\" height=\"525\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/324-03-700x525-1.jpg\" alt=\"Picture of two motors called 12V NEMA-17 steppers\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/324-03-700x525-1.jpg 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/324-03-700x525-1-300x225.jpg 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Estos peque\u00f1os ten\u00edan el tama\u00f1o perfecto (longitud de 34 mm) y encajaban a la perfecci\u00f3n dentro de los dispensadores.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4011\" width=\"1024\" height=\"576\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dispenser_profile.png\" alt=\"A picture showing the motors attached to the snack dispenser\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dispenser_profile.png 1024w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dispenser_profile-300x169.png 300w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dispenser_profile-768x432.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Dise\u00f1o de la transmisi\u00f3n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">En nuestra m\u00e1quina, la manivela dispensadora ten\u00eda un eje con una cara fresada plana que se inserta en la pieza con solapas de goma. El motor tambi\u00e9n estaba fresado en plano, pero el problema era que el di\u00e1metro del eje del motor era mucho m\u00e1s peque\u00f1o.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4024\" width=\"700\" height=\"661\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/csm_D-Cut_a38a54ae43-700x661-1.jpg\" alt=\"Picture of a motor shaft\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/csm_D-Cut_a38a54ae43-700x661-1.jpg 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/csm_D-Cut_a38a54ae43-700x661-1-300x283.jpg 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Necesit\u00e1bamos un adaptador o, en la jerga de la ingenier\u00eda mec\u00e1nica, una\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Key_(engineering)\" target=\"_tabs\" rel=\"noopener noreferrer\">llave<\/a>, para que funcionara. Como es natural, nuestra primera idea para resolver el problema fue: \u201c\u00a1Oye, podemos imprimirlo en 3D!\u201d. Porque, primero, las impresoras 3D son incre\u00edbles y, segundo, medimos las piezas y empezamos a dise\u00f1ar esa peque\u00f1a pieza para impresi\u00f3n 3D casi de inmediato.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4025\" width=\"352\" height=\"148\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/knob_axle_vs_stepper_axle.png\" alt=\"Blueprints to 3D print an adapter\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/knob_axle_vs_stepper_axle.png 352w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/knob_axle_vs_stepper_axle-300x126.png 300w\" sizes=\"(max-width: 352px) 100vw, 352px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Tardamos siete iteraciones en llegar a un dise\u00f1o decente.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4026\" width=\"700\" height=\"1041\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/key-v7-700x1041-1.png\" alt=\"Picture of final schematic for the adapter\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/key-v7-700x1041-1.png 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/key-v7-700x1041-1-202x300.png 202w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/key-v7-700x1041-1-689x1024.png 689w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">No es broma, \u00a1el versionado sem\u00e1ntico se aplica muy bien en este caso!<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4034\" width=\"700\" height=\"1244\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/adapter_irl-700x1244-1.png\" alt=\"Picture of the 3D printed adapter\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/adapter_irl-700x1244-1.png 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/adapter_irl-700x1244-1-169x300.png 169w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/adapter_irl-700x1244-1-576x1024.png 576w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Con la chaveta impresa, ya estaba lista para ser acoplada.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4039\" width=\"700\" height=\"1244\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/it_actually_fit-700x1244-1.png\" alt=\"Picture showing the adapter fits the motor shaft\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/it_actually_fit-700x1244-1.png 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/it_actually_fit-700x1244-1-169x300.png 169w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/it_actually_fit-700x1244-1-576x1024.png 576w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u00a1Un \u00e9xito! Solo por diversi\u00f3n, aqu\u00ed tienes el v\u00eddeo de la impresora haciendo lo suyo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mejor\u00e1ndolo todo con una Dremel<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bas\u00e1ndonos en la llegada a la bandeja de entrada del eje de la solapa en relaci\u00f3n con el brazo de montaje del chasis, pensamos que pod\u00edamos perforar una parte del brazo de montaje para el motor paso a paso. Tomamos la pieza que sujeta el recipiente y le hicimos algunos ajustes, lo cual fue la parte m\u00e1s emocionante.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4042\" width=\"910\" height=\"308\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dremel_fever.png\" alt=\"Slack conversation discussing Dremel Fever\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dremel_fever.png 910w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dremel_fever-300x102.png 300w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/dremel_fever-768x260.png 768w\" sizes=\"(max-width: 910px) 100vw, 910px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Con un cabezal de corte plano, quitamos el pl\u00e1stico que no nos dejaba insertar los motores paso a paso.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4044\" width=\"749\" height=\"813\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/image-1.png\" alt=\"Picture of two men putting the project together\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/image-1.png 749w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/image-1-276x300.png 276w\" sizes=\"(max-width: 749px) 100vw, 749px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Ensamblaje final<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tras unos minutos canalizando cuidadosamente la Dremel Fever\u2122, los servos encajaron a la perfecci\u00f3n. Para fijarlos, necesit\u00e1bamos encontrar algo que encajara entre los servos y el chasis. Buscando a nuestro alrededor, encontramos una goma de borrar que nos servir\u00eda. \u00bfQui\u00e9n dice que no podemos aprovechar el equipo de prototipado que ya no usamos y desplegarlo en producci\u00f3n?<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4045\" width=\"498\" height=\"1024\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/20190521_164149-rotated.jpg\" alt=\"A picture of an eraser with lines drawn on it\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/20190521_164149-rotated.jpg 498w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/20190521_164149-146x300.jpg 146w\" sizes=\"(max-width: 498px) 100vw, 498px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Lo insertamos a ambos lados del motor y encaj\u00f3 a la perfecci\u00f3n.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4046\" width=\"1024\" height=\"705\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/20190521_135913-1.jpg\" alt=\"Picture of eraser on both sides of the motor\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/20190521_135913-1.jpg 1024w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/20190521_135913-1-300x207.jpg 300w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/20190521_135913-1-768x529.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Perfecci\u00f3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dimos la vuelta a las solapas para que quedaran orientadas hacia los servos en la parte trasera del dispensador y las acoplamos con la chaveta. Lo \u00faltimo que tuvimos que hacer fue recortar las solapas para asegurarnos de que los servos pudieran girar el mecanismo con facilidad.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Este es el producto final desde el punto de vista mec\u00e1nico.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4047\" width=\"700\" height=\"946\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/20190521_135820-2-700x946-1.jpg\" alt=\"Picture of the final result of the email controlled snack machine\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/20190521_135820-2-700x946-1.jpg 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/20190521_135820-2-700x946-1-222x300.jpg 222w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Muy interesante, \u00bfverdad?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Con todas las piezas mec\u00e1nicas en su sitio, ten\u00edamos que empezar a construir el cerebro de nuestra peque\u00f1a m\u00e1quina. \u00bfQu\u00e9 se convertir\u00eda en el cerebro de nuestro duro trabajo? Una Raspberry Pi, por supuesto. Como todo el mundo sabe, casi cualquier cosa es posible con una Raspberry Pi, pero \u00a1tendr\u00e1s que esperar hasta la semana que viene para ver c\u00f3mo result\u00f3!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trastear con el hardware siempre es divertido, \u00a1y hac\u00eda tiempo que no cre\u00e1bamos nada! En esta breve serie de art\u00edculos del blog, vamos a fabricar una m\u00e1quina de snacks controlada por email utilizando un dispensador de alimentos secos, una Raspberry Pi, un par de motores paso a paso y un poco de impresi\u00f3n 3D.<\/p>\n","protected":false},"author":14,"featured_media":3952,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"blog_category":[19],"class_list":["post-19905","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-dev-life"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>M\u00e1quina de entrega de snacks: parte 1, la mec\u00e1nica - Transactional Email API Service For Developers | Mailgun<\/title>\n<meta name=\"description\" content=\"\u00bfQu\u00e9 pasa cuando le das una Dremel y un sue\u00f1o lleno de snacks a dos profesionales del desarrollo? 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