Create Support Post with 3D model

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gunrunnerjohn
Posts: 96
Joined: 28 Jun 2013, 20:17

Create Support Post with 3D model

#1 Post by gunrunnerjohn » 20 Jan 2024, 20:41

I need a simple support post. I know I can create a component, the question is how to create a structural post that will simply support a board. I have a board with four brass support posts soldered to it, and I want to represent this in the 3D display. In the display below, there are four posts that extend on the other side to support the PCB away from the surface.
___posts1.jpg
___posts1.jpg (134.53 KiB) Viewed 51021 times
As you can see below, they just appear as holes, I'd like to create a 4mm post that extends from each of these holes in the 3D display. I normally just make a component and modify something in the 3D libraries to match, but I can't find anything that would represent a simple post without any wires hanging out of it.
___posts2.jpg
___posts2.jpg (83.55 KiB) Viewed 51021 times

Tomg
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Posts: 2076
Joined: 20 Jun 2015, 18:39

Re: Create Support Post with 3D model

#2 Post by Tomg » 20 Jan 2024, 21:54

Some answers to the following questions might help...
1) What is the outside diameter of the standoff's neck that will be inserted into the PCB's mounting hole(s)?
2) What is the outside diameter of the standoff below the PCB?
3) What is the inside diameter of the standoff's threaded shaft?
4) Will the standoff be swaged to the PCB or will there be a top-side (PCB) mounting screw?
5) What is the length of the standoff as measured from the bottom of the PCB to the chassis/case?
6) Is the standoff readily available from any of your preferred vendors?
Tom

gunrunnerjohn
Posts: 96
Joined: 28 Jun 2013, 20:17

Re: Create Support Post with 3D model

#3 Post by gunrunnerjohn » 20 Jan 2024, 22:18

Tomg wrote: 20 Jan 2024, 21:54 Some answers to the following questions might help...
1) What is the outside diameter of the standoff's neck that will be inserted into the PCB's mounting hole(s)?
2) What is the outside diameter of the standoff below the PCB?
3) What is the inside diameter of the standoff's threaded shaft?
4) Will the standoff be swaged to the PCB or will there be a top-side (PCB) mounting screw?
5) What is the length of the standoff as measured from the bottom of the PCB to the chassis/case?
6) Is the standoff readily available from any of your preferred vendors?
The actual one I am using I bought from an overseas source (Aliexpress) as it was the only thing that worked in the application that I was able to find.

There is no threaded shaft, it's soldered to the copper plated holes on the PCB. The PCB is .8mm thick. It's secured using 1.7mm screws through the standoff.

I think this drawing answers most of the other questions.
___Standoff.jpg
___Standoff.jpg (40.06 KiB) Viewed 50995 times

Tomg
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Joined: 20 Jun 2015, 18:39

Re: Create Support Post with 3D model

#4 Post by Tomg » 21 Jan 2024, 14:41

Here's a zip file containing a step file (standoff.stp) of the 3D model. You might have to adjust the Z-axis position to match your PCB thickness. Just create a new user pattern with the appropriately sized pad, attach this model to it, save, create a user component (1 pin) attaching the new pattern and save. It's not the prettiest thing, but the dimensions should be correct. If they aren't, let me know and I'll edit the model for you...
standoff.zip
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Tom

gunrunnerjohn
Posts: 96
Joined: 28 Jun 2013, 20:17

Re: Create Support Post with 3D model

#5 Post by gunrunnerjohn » 21 Jan 2024, 14:48

Tomg wrote: 21 Jan 2024, 14:41 Here's a zip file containing a step file (standoff.stp) of the 3D model. You might have to adjust the Z-axis position to match your PCB thickness. Just create a new user pattern with the appropriately sized pad, attach this model to it, save, create a user component (1 pin) attaching the new pattern and save. It's not the prettiest thing, but the dimensions should be correct. If they aren't, let me know and I'll edit the model for you...
standoff.zip
Wow, thanks! It's no problem to tinker with the dimensions, I have to do that with a lot of parts. I'll give it a shot. :D

You have probably figured out that I haven't yet mastered 3D drawing applications. ;)

gunrunnerjohn
Posts: 96
Joined: 28 Jun 2013, 20:17

Re: Create Support Post with 3D model

#6 Post by gunrunnerjohn » 21 Jan 2024, 19:04

Worked great, just what I wanted for the job! Thanks again!
___standoff2.jpg
___standoff2.jpg (105.12 KiB) Viewed 50873 times

Tomg
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Posts: 2076
Joined: 20 Jun 2015, 18:39

Re: Create Support Post with 3D model

#7 Post by Tomg » 21 Jan 2024, 20:22

No problem. It was a pretty easy model to create. I didn't know the standoffs were to be placed on the top side of the PCB, otherwise I would have set it up so you wouldn't have to play around too much with the 3D placement settings. Oh, well. It looks like you were able to get them oriented as needed, anyway.
Tom

gunrunnerjohn
Posts: 96
Joined: 28 Jun 2013, 20:17

Re: Create Support Post with 3D model

#8 Post by gunrunnerjohn » 21 Jan 2024, 20:39

Yep, I'm used to fooling around with the offsets and zoom factors to create a suitable 3D representation of the components when none exists. This standoff was just a bridge too far as I couldn't find anything close to it to try to resize and rotate.

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