By Alan J. Kalameja
AUTOCAD 2010 instruct FOR ENGINEERING images is a vintage reference paintings that includes self-paced tutorials that lead either scholars and engineering photo execs from basic one-view engineering drawings to geometric structures, multiview projections, part and auxiliary perspectives, 3D reliable modeling, and photorealistic rendering. Tutorials make the most of a step by step strategy, following conventional engineering drawing innovations and strategies whereas instructing clients tips on how to take complete benefit of AutoCAD 2010 to accomplish specialist effects.
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Additional resources for AutoCAD 2010 Tutor for Engineering Graphics
73 Next, move the cursor directly above the temporary tracking point, as shown in the following image on the left. The tooltip should read 90°. Entering a value of 2 units identifies the center of the circle. The completed construction operation is illustrated in the following image on the right. 74 ALTERNATE METHODS USED FOR PRECISION DRAWING: CARTESIAN COORDINATES Before drawing precision geometry such as lines and circles, it is essential to have an understanding of coordinate systems. The Cartesian or rectangular coordinate system is a system constructed of an orthogonal axis intersecting at an origin that creates four quadrants, allowing location of any point by specifying the coordinates.
The LINE command is entered and the Endpoint mode activated. When the cursor moves over a valid endpoint, an Object Snap symbol appears along with a tooltip indicating which OSNAP mode is currently being used. Another example of the use of Object Snap is in dimensioning applications where exact endpoints and intersections are needed. Open the drawing file 01_Endpoint. Use the illustration in the following image and the command sequence below to draw a line segment from the endpoint of the arc to the endpoint of the line.
The starting point for the next line segment is considered acquired. TRY IT! Rather than enter the length of this line segment, move your cursor over the top of the corner at “B” to acquire this point (be careful not to pick the point here). Then move your cursor up until the tooltip reads 90° as shown in the following image on the right. 69 Move your cursor up until the tooltip now reads angles of 90° and 180°. Also notice the two tracking paths intersecting at the point of the two acquired points.