Prep question 16

Inserting blocks with automatic rotation in Autocad


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Convert the green objects into a block called chair with it's base point as the inside corner of the desk as shown in the drawing. Then insert the block to the insertion point shown on the right hand desk.


What is the x co-ordinate of the circle depicting the centre of the inserted chair?


Answer - 6399.9436


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Explanation



Blocks are inserted onto the current layer of Autocad. It's also the case that inserted blocks will follow the current x and y axes of the drawing. So to insert the chair block automatically rotated, to suit the left hand desk, without having to measure angles and rotate, you change the UCS.

Type in UCS (User co-ordinate system). Then follow the command line instructions. You need to place the UCS on a corner of the desk then with the next 2 clicks align the X and Y axes in the required orientation.

So that when you insert the chair it will follow the x and y axes you have created.

To find the x and y co-ordinates of a point, type in ID and click the point to read off the co-ordinates on the command line.