Anna University Regulation 2013 Information Technology (IT) GE6152 EG Notes for all 5 units are provided below. Download link for IT 1st SEM GE6152 Engineering Graphics Lecture Notes are listed down for students to make perfect utilization and score maximum marks with our study materials.

**CONSTRUCTION OF HYPERBOLA: **

3. Draw a hyperbola when the distance of the focus from the directrix is 60 and eccentricity is 4/3.

Procedure:

Draw a perpendicular line AB (directrix) and a horizontal line CE (axis).

Mark the focus point F on the axis line 40 mm from the directrix.

Divide the CF in to 2 equal parts.

As per the eccentricity mark the vertex V, in the third division of CF

Draw a perpendicular line from vertex V, and mark the point G, with the distance VF.

Join the points C& G and extend the line. Similarly mark the point G1 below the axis line.

Now join the points C& G1 and extend it.

Draw number of smooth vertical lines 1,2,3,4,5,6,etc., as shown in figure.

Now mark the points 1′, 2′, 3′, 4′, 5′…

Take the vertical distance of 11′ and with F as center draw an arc cutting the vertical line 11′ above and below the axis.

Similarly draw the arcs in all the vertical lines (22′, 33′, 44′…)

Draw a smooth curve through the cutting points to get the required hyperbola by free hand.

**CYCLOIDAL CURVES: **

9 Cycloidal curves are generated by a fixed point on the circumference of a circle, which rolls without slipping along a fixed straight line or a circle.

9 In engineering drawing some special curves (cycloidal curves) are used in the profile of teeth of gear wheels.

9 The rolling circle is called generating circle.

9 The fixed straight line or circle is called directing line or directing circle.

**CYCLOIDS: **

Cycloid is a curve generated by a point on the circumference of a circle which rolls along a straight line.

**Epicycloidal: **

An epicycloidal is a curve generated by a point on the circumference of a circle, which rolls without slipping along another circle outside it.

**Hypocycloidal: **

Hypo-is a curve generated by a point on the circumference of a circle, when the circle rolls along another circle inside it.

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