AutoCAD: The Right Hand Rule, Part 2

Do you still remember the 1st Right hand Rule? Today, let’s continue with the rule of the right hand, number 2, before raising your right hand up and clenching your fist like thumbs up (Thumb Up) as shown in the Figure 1.

Figure 1
Figure 1

When we raise our thumbs to be likened to the axis of rotation of both fingertips 4 as a direction of rotation. The direction in which the fist is clenched is Plus + and the direction opposite to the clenched fist is Minus –as shown in the Figure 2.

Figure 2

This rule applies when the UCS is to be rotated in the desired direction.

For example, if the UCS is to be rotated from its normal position, it must be parallel to work on side A as shown in the Figure 3.

Figure 3

We must rotate the UCS to hold the Y axis upright. By using the command UCS select X axis as the axis of rotation, by right hand rule the thumb points in the same direction as the X axis. In the same direction as both fingertips 4 finished, the result is as shown in the Figure 4.

Figure 4

It was found that the UCS is not parallel to the side. A We will have to rotate the UCS again to change the axis. X to the right by using the UCS command, select Y axis as the axis of rotation, according to the right-hand rule, the thumb points in the same direction as the axis. Y The X shift must be set to a negative 90-degree angle because the rotation is in the opposite direction to both fingertips. 4 finished, the result is as shown in the Figure 5.

Figure 5

Found that the UCS is rotated parallel to side A, allowing work on this side. is called the working plane. Try to create a result as shown in the Figure 6.

Figure 6

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