{"id":2374,"date":"2026-02-07T09:44:00","date_gmt":"2026-02-07T01:44:00","guid":{"rendered":"https:\/\/www.takebrakes.com\/?p=2374"},"modified":"2026-02-05T14:43:13","modified_gmt":"2026-02-05T06:43:13","slug":"why-does-a-dc-electromagnetic-brake-have-weak-holding-or-weak-pull-in-on-a-crane","status":"publish","type":"post","link":"https:\/\/www.takebrakes.com\/it\/why-does-a-dc-electromagnetic-brake-have-weak-holding-or-weak-pull-in-on-a-crane\/","title":{"rendered":"Perch\u00e9 un freno elettromagnetico DC ha una tenuta debole o un \u201ctiraggio debole\u201d su una gru?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A DC electromagnetic brake that pulls in weakly usually points to an electrical supply or air-gap issue. On overhead crane and gantry crane motor brakes, the most common causes are <strong>undervoltage<\/strong>, incorrect rectifier selection, excessive voltage drop due to long cables, loose terminals, or an incorrect coil rating (110V vs 220V). A failing power supply box\/rectifier can also create high ripple DC, causing buzzing and reduced magnetic force.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I fattori meccanici possono amplificare la debolezza elettrica. Se l'intervallo d'aria \u00e8 troppo grande a causa di usura o errata regolazione, la bobina potrebbe non sviluppare abbastanza forza per rilasciare completamente o attrarre completamente l'armatura. Sporco, corrosione o superfici dell'armatura deformate possono anche impedire il contatto completo. La soluzione \u00e8 misurare la tensione della bobina ai terminali del freno sotto carico, confermare le specifiche del raddrizzatore, controllare la resistenza della bobina e ripristinare l'intervallo d'aria ai limiti OEM. Un'alimentazione elettrica affidabile \u00e8 essenziale per un rilascio costante del freno e un'operazione sicura.<\/p>","protected":false},"excerpt":{"rendered":"<p>A DC electromagnetic brake that pulls in weakly usually points to an electrical supply or air-gap issue. On overhead crane and gantry crane motor brakes, the most common causes are undervoltage, incorrect rectifier selection, excessive voltage drop due to long cables, loose terminals, or an incorrect coil rating (110V vs 220V). A failing power supply [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[132,3],"tags":[133],"class_list":["post-2374","post","type-post","status-publish","format-standard","hentry","category-faq","category-blog","tag-overhead-or-gantry-crane"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.takebrakes.com\/it\/wp-json\/wp\/v2\/posts\/2374","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.takebrakes.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.takebrakes.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.takebrakes.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.takebrakes.com\/it\/wp-json\/wp\/v2\/comments?post=2374"}],"version-history":[{"count":1,"href":"https:\/\/www.takebrakes.com\/it\/wp-json\/wp\/v2\/posts\/2374\/revisions"}],"predecessor-version":[{"id":2391,"href":"https:\/\/www.takebrakes.com\/it\/wp-json\/wp\/v2\/posts\/2374\/revisions\/2391"}],"wp:attachment":[{"href":"https:\/\/www.takebrakes.com\/it\/wp-json\/wp\/v2\/media?parent=2374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.takebrakes.com\/it\/wp-json\/wp\/v2\/categories?post=2374"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.takebrakes.com\/it\/wp-json\/wp\/v2\/tags?post=2374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}