The Equivalence Constraint (Equal Constraint) allows you to enforce identical dimensions across multiple sketch elements such as lines, arcs, or circles. This ensures design consistency and enables parametric control using a single reference value. 

 

1. Creating an Equal Constraint 

To apply an equivalence constraint, In Sketcher Workbench; 

1. Select multiple sketch elements (lines, arcs, or circles). 

2. The first selected element defines the reference length/value. 

3. Apply the Equal (Equivalence) constraint. 

4. All selected elements will adopt the same dimension. 

Note: The dimension of the first selected element drives all others. 

 

 

 

 

 

2. Adding Dimensions to an Existing Equivalence Group 

You can extend an existing equivalence group with additional dimensions: 

1. Select a dimension that already belongs to an equivalence group. 

2. Hold down the Ctrl key. 

3. Select one or more dimensions of the same type. 

4. Right-click to open the contextual menu. 

5. Click “Add Equivalent Dimensions.” 

The selected dimensions will be added to the group and automatically updated to match the group value. 

 

 

 

 

⚠️ Important Notes When Adding Equivalent Dimensions 

• Only dimensions of the same type can be grouped. 

• If selected dimensions include formulas a warning dialog appears. You can choose to ignore those constraints or cancel the operation 

 

Conclusion 

Using Equivalence Constraints allows you to: 

• Control multiple elements with a single dimension 

• Maintain design consistency 

• Improve parametric efficiency 

• Simplify updates and modifications 

This is especially useful for repetitive or symmetrical design.