Irrational Posted December 7, 2012 Posted December 7, 2012 Hello. I am new to AutoCAD and I am trying to revolve a rectangle around its height in order to get a 3d object but I get a message : "The object should be on one side of the axis." . How can i resolve this problem? Quote
MSasu Posted December 7, 2012 Posted December 7, 2012 You want to get a cylinder, right? Please pay attention that you should draw and revolve only half of its longitudinal section, that it the part between cylinder axis and circumference. Please check the image below - you should draw the part in red and revolve it on the blue axis. Quote
MSasu Posted December 7, 2012 Posted December 7, 2012 You're welcome! And also, welcome to the Forum! Quote
MarkT65 Posted December 7, 2012 Posted December 7, 2012 Hi If its 3d, is it not easier to just push/pull/extrude to the height you want to get the 3d model? or am I completely lost?. Mark Quote
ReMark Posted December 7, 2012 Posted December 7, 2012 How would you PushPull a rectangle to create a cylinder? Quote
MarkT65 Posted December 7, 2012 Posted December 7, 2012 Hi He says " I am trying to revolve a rectangle around its height" my apologies if im wrong but I thought he wants a rectangle, I am on LT so dont have 3d but I thought you could just go to the right plane and draw your radius and then revolve it. But why would you revolve a rectangle to get a cylinder? Mark Quote
MSasu Posted December 7, 2012 Posted December 7, 2012 There are at least four ways to get a cylinder: call the CYLINDER command, draw a circle and apply EXTRUDE command on it, draw a circle and apply PRESSPULL command on it, draw a rectangle and apply REVOLVE command on it using one of its edges as axis. OP's question was just why he/she cannot get results by the choused method. Quote
ReMark Posted December 7, 2012 Posted December 7, 2012 Did you not see the graphic MSasu included with his post? And doesn't that graphic adequately convey the required information? Revolving a rectangle to create a cylinder is an acceptable option albeit not one many users would initially consider. Open your mind to new possibilities. You never know when you might have need of this particular method. Quote
JD Mather Posted December 7, 2012 Posted December 7, 2012 (edited) Here is a reason to revolve a rectangle http://www.cadtutor.net/forum/showthread.php?75623-Please-help-with-drawing-of-a-pipe the easiest solution involves all 2d geomety on one plane - so no need to change ucs or rotate objects after creation. I quite frequently use Revovle rather than the other possible alternatives as it can be much faster to produce the 2D profiles. I have another example that I'll try to post later today. Edited December 7, 2012 by JD Mather Quote
MarkT65 Posted December 7, 2012 Posted December 7, 2012 Ah, well I would never have thought that would do it but you learn somthing new all the time, thanks for explaining this. Mark Quote
ReMark Posted December 7, 2012 Posted December 7, 2012 If you are using LT then I suggest you change your Profile to indicate that is the case. Thanks. Quote
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