진위치

정의

기준에 대한 형상 위치 오차를 관리하는 기하공차.

프론트매터의 정의를 기준으로 삼고 셋업·가공·검사 전 과정에서 같은 의미로 사용합니다.

공식 / 규칙

• For a 2D hole-center check, a common calculation is TP = 2 × sqrt((ΔX)^2 + (ΔY)^2) in the drawing unit.
• Evaluate true position against the active datum structure, not against free-state coordinates.

대표 범위

• Review the tolerance as a diametrical zone and confirm whether MMC/LMC modifiers change the effective limit.
• Check X/Y drift together; a single-axis result can look acceptable while combined position does not.

현장 시나리오

• Use true position to review hole patterns before committing rework on a precision plate.
• Compare measured center drift with the active datum before moving offsets on a multi-feature part.

일반 오류 / 문제 해결

• If holes fail true position unexpectedly, verify both datum lock and hole-center measurement method before reworking parts.
• If correction makes one feature better but another worse, check whether the active datum or pattern origin is wrong.

관련 도구

• True Position Calculator
• Gdt Reference