{"id":20971,"date":"2025-08-15T00:27:32","date_gmt":"2025-08-15T08:27:32","guid":{"rendered":"https:\/\/shengenfab.com\/?p=20971"},"modified":"2025-08-15T00:51:39","modified_gmt":"2025-08-15T08:51:39","slug":"true-position-in-gdt","status":"publish","type":"post","link":"https:\/\/shengenfab.com\/pl\/true-position-in-gdt\/","title":{"rendered":"Prawdziwa pozycja w GD&T: Co to znaczy i dlaczego ma znaczenie\uff1f"},"content":{"rendered":"
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True Position to jedna z najcz\u0119\u015bciej stosowanych koncepcji w wymiarowaniu i tolerowaniu geometrycznym (GD&T). Oferuje ona bardziej kompletny spos\u00f3b definiowania po\u0142o\u017cenia element\u00f3w na cz\u0119\u015bci, zw\u0142aszcza otwor\u00f3w i szczelin. Zamiast standardowych wymiar\u00f3w X i Y z indywidualnymi tolerancjami, True Position kontroluje og\u00f3lne odchylenie od idealnej lokalizacji za pomoc\u0105 okr\u0105g\u0142ej lub cylindrycznej strefy tolerancji.<\/p>

By using True Position, engineers can control how much a feature can shift in any direction from its ideal location. This approach is much more effective than separating \u00b1 tolerances for each coordinate. It also works better for features aligning with mating parts or assemblies. Let’s break it down from the start.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Czym jest prawdziwa pozycja w GD&T?<\/h2>

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Pozycja rzeczywista to dok\u0142adna lokalizacja elementu, takiego jak otw\u00f3r, sworze\u0144 lub szczelina, zdefiniowana w odniesieniu do uk\u0142ad\u00f3w odniesienia. Po prostu m\u00f3wi nam, gdzie element powinien by\u0107 umieszczony na cz\u0119\u015bci. Zamiast skupia\u0107 si\u0119 na dok\u0142adnych warto\u015bciach X i Y, definiuje stref\u0119 - zwykle okr\u0105g lub cylinder - w kt\u00f3rej musi znajdowa\u0107 si\u0119 \u015brodek elementu.<\/p>

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This zone is centered on the theoretical location, called the “nominal” location. The part is considered acceptable if the actual center of the feature falls within the zone. The size of the zone depends on the allowed tolerance, which is specified in the feature control frame.<\/p>

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For example, if a hole’s true position tolerance is 0.2 mm, the center of that hole must fall within a 0.2 mm diameter circle around the exact target location. Whether the hole shifts left, right, up, or down, it’s still okay if it stays inside that circular area.<\/p>

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True Position is often used with other GD&T symbols, such as datums, material condition modifiers like MMC (Maximum Material Condition), and basic dimensions. These elements work together to describe a feature’s location, size, and limits more clearly than traditional tolerancing.<\/p>

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Kluczowe symbole i terminologia<\/h3>

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To work with True Position, it’s important to understand the key symbols and terms used in a GD&T feature control frame. These elements define how the tolerance is applied and what measurements matter.<\/p>

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