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  • Users: DrMetal
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  1. DrMetal

    Find circle radius & circle center in 3D from (3) XYZ pts

    GIVEN: X-Y-Z coordinates of 3 points in 3D space. FIND: Radius of circle on those 3 points & Circle center co-ordinatesBookmark: Question: Can someone provide a mathematical step by step procedure to calculate and determine a circle radius and the center point coordinates from three GIVEN 3D...
  2. DrMetal

    AWS D1.5 Bridge Code: PQR question

    My company and our customer have a difference of opinion on the meaning of AWS D1.5 Para 5.12.1 and 5.12.3 and other associated paragraphs in section 5.12. BACKGROUND: We performed a PQR on HSLA steel plate (A709/A572-50) for a bridge construction job in San Diego. We used the "Heat Input...
  3. DrMetal

    Problems milling a "perfect" straight line on a VTL with live tooling

    We have a 1991 Berthiez (french) Vertical Turning Lathe (model TVM-100). The vertical ram (Z axis) has a live tooling attachment for milling & drilling. In turning / boring mode, the table can reach 600 RPM. In milling mode, a precision, low speed gearbox servo engages the table for a max of...

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