1、 Ford Proprietary and/or Confidential Information - Do not distribute to others w/o prior written authorization. FECDS C-2 Engineering CAD & Drafting Standards Version 28 TOC Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20100630C21 Printed copies are uncontrolled.LETTERS
2、AND NUMERALS 1 INTRODUCTION With the use of microfilming, drawings are subject to a considerable reduction in size which places a greater emphasis on high quality lettering and lettering proportions. These should conform to ISO 3098/21974(E) which has been designed for microfilm application. 2 DEFIN
3、ITIONS (Reserved) 3 REQUIREMENTS 3.1 STYLE 3.1.1. The single stroke upper case lettering and numerals will be used in line with Lettering Standard B Vertical which has a line thickness to letter height ratio of 1: 10, see Figure C2.1. Figure C2.1 ENGINEERING CAD & DRAFTING STANDARDS Return to TOC Or
4、iginal Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20100630C22 Printed copies are uncontrolled.3.2 LOWERCASE 3.2.1 Restricted to the representation of SI Units when in abbreviated form or where the use of uppercase may be confusing. 3.3 LEGIBILITY 3.3.1 Lettering must be clean an
5、d dense to ensure satisfactory reproduction and legibility in either ink or lead. 3.4 UNIFORMITY 3.4.1 Uniform style and line thickness must be maintained throughout the drawing, although height, size and spacing will vary according to usage. Reduced text height may be used on A4 drawing forms only.
6、 See Figure C2.2. For drawing revisions the existing lettering style must be used wherever possible. Bold text may be used for clarity. 3.4.2 For CtM, text heights may be scaled proportionally from those shown in Figure C-2.2 where necessary for clarity. Uniform style and thickness shall be maintain
7、ed throughout the model. 3.5 FREEHAND LETTERING 3.5.1 It is permissible but not recommended. Freehand lettering must conform to the standard. See Figure C2.2. 3.6 LETTERING AIDS 3.6.1 Used for freehand lettering, the use of aids to improve uniformity is encouraged. The use of lettering templates is
8、recommended, particularly for main part numbers and drawing titles. 3.6.2 For typewritten appliqus and computer aided design drafting systems, the fonts and vertical text spacing which most closely match the ISO 3098/21974 (E), Technical DrawingLettering Standard must be used, and must meet microfil
9、m standards and receive Ford Motor Company Engineering CAD and Drafting Standards (FECDS) Committee approval. 3.6.3 The following are the recommended fonts for specific CAD packages. IDEAS - ISO 3098 CATIA- ISO 3098-3 (ISO 3098-2 acceptable for earlier C3P NG releases) For software not listed above,
10、 Arial True Type fonts are preferred. Similar True Type fonts are acceptable. ENGINEERING CAD & DRAFTING STANDARDS Return to TOC APPLICATION TEXT HEIGHT EXAMPLE DIMENSIONS 2.54 +2.5 SPECIFIC TOLERANCE -3.5 REVISION BALLOONS REVISION INDEX BALLOONS LOWER CASE LETTERS FOR SI ABBREVIATIONS 3 2.1* d n p
11、 t LETTERS FOR ABBREVIATIONS/ NOTES PCD - NOT CONVEX PART NUMBERS (IN CALLOUT NOTATION) W700123 TITLES FOR ADDITIONAL PART NUMBERS GEAR DRIVE ALL MAIN TITLES PANEL ROOF POINTS, LINES, VIEWS, REFERENCE LETTERS (IN NOTATION) BETWEEN LINES C & D SECTIONS AND SECTIONAL VIEWS (IN NOTATION) SEE SECTION A
12、GRID LINE IDENTIFICATION ITEM NUMBERS 5 3.5* 1200 ALL MAIN PART NUMBERS (DRAWING NUMBERS) XR3.CD POINTS, LINES, VIEWS, REFERENCE LETTERS AB.Z Z, Y.A SECTIONS AND SECTIONAL VIEWS A * may be used for A4 forms only Figure C2.2 A1A2 4 SPECIFICATIONS 5 ADDENDUM (Reserved) Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20100630C23 Printed copies are uncontrolled.
