To add traction relation:
- Sketch multiple circular or linear entities to represent gears, rack and pinion mechanisms, etc.
- Make each entity a separate block.
- Add relations and dimensions to eliminate motion not related to the mechanism.
Limit the use of the Fix relation, for example to the center of one circle. Use horizontal and vertical relations, dimensions, or construction geometry to locate the centers of additional circles or sketch entities. Adding multiple fix relations potentially restricts the model's degrees of freedom.
- In the graphics area, select two sketch entities to which you want to add relative rotation constraints.