Hip tip: LINE-LINE, LINE-ARC-ARC-ARC-ARC-LINE continuity.
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Author | Orhan Toker |
| Profession | Architect M.Sc. | |
| Autodesk Authorized Consultant | ||
| Database Specialist | ||
AutoCAD 12 and higher versions
Hi Dear Readers,
I decided to touch on again ‘the techniques of drawing line, continued with line and arc, arc, arc and line group’ subject that I was mentioned in one of my previous articles called ‘Arc drawing techniques in AutoCAD’ since I think the subject was passed a bit unnoticed.
The issue of the subject is that no matter what you draw in AutoCAD, the point you marked on the screen is coded in the program. (For concerning users, the LASTPOINT system variable was built for this) The design engineers of AutoCAD have developed a code for storing the tangential of the last drawn object (apart form the last point) if it is a LINE or an ARC. The topic of my article is about this convenience and the rest of it is about how we are going to use it.
Let us proceed with drawing a line and exiting from the command. If you start to draw a line again and simply press enter when you are asked for a starting point, you can see the command continues from the end point of the previously drawn line. Form the drawing in the Figure.1 by using this option.
Figure.1
Draw a 200-unit horizontal line and exit from the command first.
Figure.2
Repeat line command later and press enter when the first point is asked. By doing this, the command continues from the last point of the line drawn before.
Figure.3
Draw a 100-unit line downwards and exit from the command. Now it is time to see the LINE-ARC continuity. Switch to arc command and press enter when you are asked for the start point. You can see an ARC coming tangent to the previously drawn line. This is called as the LINE-ARC continuity. Proceed 200 units to the left.
Figure.4
Again draw a line to enclose the figure and exit. (You know what to do when you are asked for the first point)
Figure.5
With some simple information you can speed up your drawing. Regards.
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February 6th, 2008 01:31
Using a polyline and just typing “a” will change the next segment to arc, too. Nice having segments attached.
dv
April 22nd, 2008 09:22
[...] On the other hand, we are very aware of it sometimes and we first draw decorative objects using ARC-ARC continuity and then transform it into a PLOYLINE to send it to the CNC. PEDIT command is designed for these [...]