Sengna Posted February 27, 2014 Posted February 27, 2014 Hi! I have two questions in one post, hope i am allowed to do that, i was wondering, do i need to show the centerline for ellipse geometry on CAD drawing? we do that on circle. this is the big tank with the round clean out door 24" Diameter, i need to locate the location of this round clean out door, i know the Y-Distance it's 54" from the bottom of the tank to center of this round door, how do i measure the X-distance from where it locates? this is for Elevation view. if this is a flat surface it's easy to measure. thanks Quote
JD Mather Posted February 27, 2014 Posted February 27, 2014 It would be projected from the top view. Quote
Dana W Posted February 27, 2014 Posted February 27, 2014 Since the tank is round, the only way to locate the door's position side to side distance would be from some prominent feature on the tank. JD is right. In the top view, I would locate the door center line by an angular dimension from some other prominent feature that is visible and dimensioned in that view. Quote
Sengna Posted February 28, 2014 Author Posted February 28, 2014 Ok, i have an issue with ellipse on the outter lid, i projected line from the top view and on the left side did not line up (see cloud revision) I know the dia of the outter is 24" but i can't use the dimension tool to measure ellipse. The round door is at an angle which makes it's tough. anyone know how to solve this? Quote
Sengna Posted February 28, 2014 Author Posted February 28, 2014 Sorry the previous pic is not very clear, but here is what i was talking about. Quote
Dana W Posted February 28, 2014 Posted February 28, 2014 (edited) This is a perfect job for 3D. The projected lines would have lined up, IF you had projected them before you drew the front view of the door, then drawn to the lines. Wait! Is this door a circle, or at least round, if viewed straight on, and only an ellipse because it is viewed at an angle in the front view of the tank? you keep using the term diameter, is why I am asking. Whether the door is a true circle or an ellipse, it still cannot be represented in its true shape in that front view of the tank. It will either be an ellipse derived from a rotated circle, or a real skinny ellipse derived from a rotated fatter ellipse. Don't dimension anything that cannot be shown in its true shape. This is called a foreshortened view, and cannot show the real size of anything. The only thing you can dimension accurately about the door in the front view of the tank, is the vertical distance to its horizontal axis from the top and/or bottom of the tank. You can locate the top view center line of the door by using an angular dimension to show the angle in degrees the door center line is away from, let's say the X and/or Y center lines of the tank itself. Use auxiliary views to dimension the true size and shape of the door and its fittings. If it is round, show it round in the aux. view(s) as if it is viewed straight on. I see that you have an aux. top view of the door. Do not show the aux. front view of the door as if it is turned at an angle. Rotate that aux. top view of the door so it will be perfectly horizontal, and then draw the front view of the door below it. Here is a rudimentary drawing illustrating what I mean. TANK W DOOR.dwg Edited February 28, 2014 by Dana W Quote
Sengna Posted February 28, 2014 Author Posted February 28, 2014 Wait! Is this door a circle, or at least round, if viewed straight on, and only an ellipse because it is viewed at an angle in the front view of the tank? you keep using the term diameter, is why I am asking. First, Thank you very much Dana W. for your well suggestion, to answer your question, Yes, if looking straight on the door is 24" circle. (Note: i have to draw this tank and door at this potition because this tank is set on the top of beams) Do not show the aux. front view of the door as if it is turned at an angle. To make sure i understand this right, i don't need to project this flange that sticking out on the front view??? shown on the red X. That would make my life much easier. Quote
Dana W Posted February 28, 2014 Posted February 28, 2014 I am talking about the auxiliary view(s) of the door alone when I say draw it STRAIGHT ON. The door is detailed enough to call for auxiliary views, a TOP, FRONT, and SIDE VIEW of it, at the very least. Do you understand what I mean by Auxiliary Views? If the flange is visible in the views of the tank, then it will have to be drawn. What is the purpose of this drawing? Is it for fabrication of the tank? The amount of detail and dimensions needed will depend on what the drawing is for. I don't know anything about tank fabrication so I am not going to get into any detail on that. I am just trying to explain the pretty much universally accepted way to represent objects in a 2D drawing. Quote
Sengna Posted February 28, 2014 Author Posted February 28, 2014 I am talking about the auxiliary view(s) of the door alone when I say draw it STRAIGHT ON. The door is detailed enough to call for auxiliary views, a TOP, FRONT, and SIDE VIEW of it, at the very least. Do you understand what I mean by Auxiliary Views? If the flange is visible in the views of the tank, then it will have to be drawn. What is the purpose of this drawing? Is it for fabrication of the tank? The amount of detail and dimensions needed will depend on what the drawing is for. I don't know anything about tank fabrication so I am not going to get into any detail on that. I am just trying to explain the pretty much universally accepted way to represent objects in a 2D drawing. Ok, I've got you. I can't really see the flange when looking straight on, i guess I made it too difficult for putting too much little detail. All i am doing is to design a catwalk around the tank. But i want to draw as accurate as possible. Quote
ReMark Posted February 28, 2014 Posted February 28, 2014 Here's a tank I'm working on today. I did it as a 3D model. I'll extract the 2D views from it once it is completed. Quote
JD Mather Posted February 28, 2014 Posted February 28, 2014 I'll extract the 2D views from it once it is completed. You might also include some orthographic projection lines between views to show how the traditional 2D only technique would be used in case the OP doesn't have time to learn 3D. Quote
ReMark Posted February 28, 2014 Posted February 28, 2014 I'll give that some thought. Right now I have ahead tank to complete that is supposed to sit above the top of this tank. No one here is sure how they want to support it though. I'd like to build off the tank itself by spanning the top with a couple of channels. Someone else has proposed an independent support tied into an overhead beam. Quote
Sengna Posted February 28, 2014 Author Posted February 28, 2014 [ATTACH=CONFIG]47201[/ATTACH]Here's a tank I'm working on today. I did it as a 3D model. I'll extract the 2D views from it once it is completed. Are you using Autocad 3D or Inventor to draw this? I am still learning autodesk inventor right now, you will be surprise how much that inventor can do. This looks great remark. I will buy you beer if coming down to my state so you can teach me Quote
ReMark Posted February 28, 2014 Posted February 28, 2014 I do everything with an antiquated CAD program called AutoCAD. Plain, generic AutoCAD. I don't use Inventor. No smoke and mirrors were used to create the image I posted. I'm located in the State of Confusion. What state are you located in? Quote
Sengna Posted February 28, 2014 Author Posted February 28, 2014 I'm located in the State of Confusion. What state are you located in? State of Confusion?? is it Connecticut?? I am in Washington State. The tank looks great and encourage me to start moving on 3D. you are very well versed in autocad and 3D Remark, i can see alot of your posts in this forum, thanks so much for all you time and effort. Quote
ROBP Posted February 28, 2014 Posted February 28, 2014 I'll give that some thought. Right now I have ahead tank to complete that is supposed to sit above the top of this tank. No one here is sure how they want to support it though. I'd like to build off the tank itself by spanning the top with a couple of channels. Someone else has proposed an independent support tied into an overhead beam. All depends how big is the tank thtt will be sitting on top of the existing one. How heavy will it be when filled? Will it be directly and in line connected to the nozzle on the top existing one? Quote
ROBP Posted February 28, 2014 Posted February 28, 2014 [ATTACH=CONFIG]47201[/ATTACH]Here's a tank I'm working on today. I did it as a 3D model. I'll extract the 2D views from it once it is completed. Nice work ReMark nice to see that we earn from the same trade Quote
ROBP Posted February 28, 2014 Posted February 28, 2014 [ATTACH=CONFIG]47201[/ATTACH]Here's a tank I'm working on today. I did it as a 3D model. I'll extract the 2D views from it once it is completed. API or ASME or none code type? Quote
ReMark Posted February 28, 2014 Posted February 28, 2014 State of Confusion?? is it Connecticut?? I am in Washington State. The tank looks great and encourage me to start moving on 3D. you are very well versed in autocad and 3D Remark, i can see alot of your posts in this forum, thanks so much for all you time and effort. You are absolutely right...I live in Connecticut. Where in Washington are you located? I've been to Seattle and have driven down the west coast of the state after visiting in Vancouver, B.C. I even stopped in Bellingham and took the ferry over to Lummi Island to visit a friend who was building a house there at the time. I think it was 101 that I took having gone through Crescent City and eventually down to Eureka, CA. I am fairly well acquainted with AutoCAD and its 3D capabilities. Thank you for your kind comments. Regards, ReMark Quote
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