This document summarizes the key points from a workshop on Pro/ENGINEER dimensions and constraints: 1) It discusses the different types of dimensions including weak, strong, radius, diameter, and angular dimensions and how to use them to define shapes. 2) It also covers the definition and types of constraints, including horizontal, vertical, perpendicular, tangent, equal, parallel, and symmetric constraints and how they are used to define drawings. 3) Examples are provided of how to apply dimensions and constraints to draw shapes like rectangles, circles, triangles, and practice drawings.

1. Week 2 Day 1
Workshop by

2. Highlights of Previous Lecture
• What is CAD and its advantages?
• Introduction to Pro/ENGINEER and its
environment
• Introduction to Sketch mode and its tools

3. Today’s Lecture
• Dimensions
– Definition
– Weak Dimensions
– Strong Dimensions
– How to use Dimensions to give a required shape
• Constraints
– Definition
– Types of Constraints
• Practicing Dimensions and Constraints

4. Dimensions
• Definition
– Measurement of entities
• Length
• Radius, Diameter
• Angles

5. Weak vs. Strong Dimensions
• Weak Dimensions
– Are grey in color
– made automatically by the software
– Can be modified by dragging the edges of shape(s)
• Strong Dimensions
– Are in white color
– Have to be entered manually
– Locks the shape, i.e. the feature cannot be
dragged to change

6. Dimensioning a Shape
• Draw a rectangle, randomly of any size
• Now we want to make its size
• Double click the weak dimensions
– They will become editable
– Enter the desired values

7. Radius & Diameter Dimensions
• To this rectangle, add Fillet of dimension 3
units
– Fillet measuring dimension is Radius
• Now add a circle at the center of this shape of
diameter 5 units or radius 2.5 units

9. Angular Dimensions
• Draw 2 lines of any dimensions, both meeting
at one point
• Click the Dimension tool
• Select the two lines
• Now click the MMB between these lines

10. Constraints
• Definition
– A limitation or restriction
• Why they are used?
– To give our drawings a definite shape
• Types
– Horizontal, Vertical, Perpendicular, Tangent, Equal
Parallel, Symmetric

11. Using Constraints
• Click the constraint icon
• pops-up a window, with title “Constraints”
• Draw different shapes and apply them
• Represented by letters and symbols

12. Horizontal Constraint
• Makes any line horizontal
• Represented by letter “H”
Horizontal constraint

13. Vertical Constraint
• Makes any line vertical
• Represented by letter “V”
Vertical constraint

14. Parallel Constraint
• Makes two line Parallel to each other
• Represented by the symbol “//”
Parallel
constraint

15. Perpendicular Constraint
• Makes two lines perpendicular to each other
• Also called “Orthogonal” constraint
Perpendicular
constraint

16. Equal Constraint
• Makes two entities equal to each other
• Applied to radius (R), diameter, length (L),
angles measurement
Equal constraint

17. Tangential Constraint
• Makes a point tangent to the curve
• Represented by letter “T”
Tangential
constraint

18. Applying Constraints
• Equilateral Triangle
• Isosceles Triangle

19. Equilateral Triangle

20. Isosceles Triangle

21. Practice Drawing 1

22. Practice Drawing 2