placing an object within 3D at a specific point

[ktnalive]

I do not have any dimensions to give you as I did not receive any, except that I was to use logical thinking. I have attached 2 pictures plus the dwg file. In the dwg file, I need the blue line connected to the top of the hollow cylinder at the centre of the base of the pink cylinder. The future plank (blue line) will run parallel to the large cylinder.

Thanks in advance for your time and help.

[j.palmeL29YX]

I do not full understand what you want to achieve, but I hope the following video can point you in a helpful direction. 

The main idea: create a new 3DSolid from a copy of the both given objects using the intersect command. So you get an object where you can pick the needed object snap points. 

[ktnalive]

Hi, I got lost in translation. I know what you did works, as I saw it in your video. Unfortunately, I am using AutoCAD 2024, and there was no audio in your video. So my first question is why did you COPY the entire image, where did you copy it, and how did you get the ARRAY command under the COPY command? The second question is, what is the window that comes up when you are done copying, it shows that both objects are called "3D Object (2)," is this a PROPERTIES window? The third question is after copying how did the bent circle appear in the "pink" cylinder?

Thanks so much for your help, it is much appreciated.

[j.palmeL29YX · Accepted solution]

well, my videos are without sound. I'll try to explain in words with my bad english: 

if you use the intersect command (as I did), the selected objects will disappear, only the overlapping (the common) volume of all selected objects will remain (see the online help for more information about the intersect command). Because you don't want to be deleted the both given origin objects, the first step is to create one copy of both at the same place. (Copy from (base point):  any point   Copy to (second point): @ - that is equal to @0,0,0 and gives as result a copy at the same place. ). An array command is not used. 

In the next step I only wanted to show (with help of the properties window - Ctrl+1) the result: you have now 4 objects - two small vertical cylinders and two horizontal large "pipes". Then the intersect command is applied to one of the cylinders and one of the pipes. The result is the common volume of both - the bent disc. Its snap points (END) can be used to place the line(s). At the end you can erase the small disc, you don't need it anymore.

[ktnalive]

Thanks for your time.