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Freehand drawing enables visualization of an idea in the form of a sketch. It is also a universal language designers use to communicate with other participants of a project. That is why freehand drawing ought to be an inherent element of a design process, especially in the first conceptual phase.
Following principles should be followed for free hand sketching:
- The object should be examined in detail as well as its goals and concepts should be considered.
- The selection of a view is based on a more specific aspect.
- The sizes of views are used to specify space on a drawing sheet.
- Dim lines are drawn so that extra lines may be erased easily.
- Although the ratio and proportion of distinct sections of an object are examined, neither scale or ruler are utilized in drawing.
- Firstly, horizontal lines are drawn then vertical lines are drawn, and arcs and circles are drawn lastly.
- After completing the diagram, a clear scale is written in some suitable manner.
Because a draftsman must review the designs of every object from the engineer, free hand drawing is very important in practical work. When inspecting the whole drawing, a lot of time is wasted on making any necessary changes. Because free hand drawing takes less time, it should be relied on at first.