jl9r Posted June 25, 2009 Share Posted June 25, 2009 Hi there I have searched through and found various answers to the 'how to draw a 3D thread'. I followed the tutorial on helix and then sweep - BUT I cannot get it to produce more than 3 full threads. I then have had to copy and paste the thread across to get more turns. Also - how do I turn this into a solid. The tutorial says that you just produce a cylinder inside the thread and use the union command. I try this and it will not union them and when I try a subtract command later to remove a flat from the thread, it does nothing... Any help would be greatly appreciated. Thanks John Quote Link to comment Share on other sites More sharing options...
JD Mather Posted June 25, 2009 Share Posted June 25, 2009 http://home.pct.edu/~jmather/content/CAD238/AutoCAD%202007%20Tutorial%204.pdf If you can't figure it out zip and attach what you have so far. Quote Link to comment Share on other sites More sharing options...
jl9r Posted June 25, 2009 Author Share Posted June 25, 2009 Thanks - I think I worked out that my original shape wasn't closed, working now! Quote Link to comment Share on other sites More sharing options...
Pete G Posted October 10, 2009 Share Posted October 10, 2009 Gents, I have been attempting to follow this tutorial but with out the associated files. ~The main issue I seem to be having is when I create the cutting tool from a 3 line polyline triangle the result is 3 individually swept surfaces. I need the thread to be solid so I can subtract it from a cylinder and indent the thread into it. I see that the Cutting Tool in the tutorial has 3 extra lines inset, why is that? Is it a solid surface? must i sweep a differnt poly line object? or a joined polyline object? Im new to CAD and any help would be appreciated. Quote Link to comment Share on other sites More sharing options...
kencaz Posted October 12, 2009 Share Posted October 12, 2009 Gents, I have been attempting to follow this tutorial but with out the associated files. ~The main issue I seem to be having is when I create the cutting tool from a 3 line polyline triangle the result is 3 individually swept surfaces. I need the thread to be solid so I can subtract it from a cylinder and indent the thread into it. I see that the Cutting Tool in the tutorial has 3 extra lines inset, why is that? Is it a solid surface? must i sweep a differnt poly line object? or a joined polyline object? Im new to CAD and any help would be appreciated. Your thread cutting profile must be a joined or it will sweep only 3 surfaces as you stated. Use PEDIT and join the three lines then sweep the helix. KC Quote Link to comment Share on other sites More sharing options...
Pete G Posted October 12, 2009 Share Posted October 12, 2009 Thanks, this worked last night. I have now since gone to work and started over and I cant get the damn thing working. This is what I have done, drawn 3 lines on a flat plane to form a triangle. I have then joined them. I then move the triangle to position it with the top of the helix that i want to sweep. type "sweep" then select the triangle, then when promted I select the helix as the sweep path. I then get a message saying "unable to sweep the selected object." Extremely frustrating as last night I did what you told me in a matter of seconds. Quote Link to comment Share on other sites More sharing options...
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