Hi,
Here is my contribution: feet for the HP/Agilent 8590 spectrum analyzer series.
A little background: this series uses rubber feet around the case (front and back). These rubber parts get really worn out with time and in my case, the two units I purchased came without any feet. I think that the previous owner either "forgot" to put them back on or, my suspicion, the devices where installed in some rack or whatever.
Using these devices without the feet is not reasonable, because the metal case around the device has a joint on the lower side. If you put the device flat on a table, it will wobble to the left and right due to this joint.
Also, without the back feet, you cannot place the device in vertical position, for example in case of storage with small footprint.
This means I really needed some feet.
Casually, I am working on a software project that requires to capture 3D points using a Microscribe arm (
https://revware.net/products/microscribe-portable-cmm/).
Also, I finally managed to repair an old unit that was a dumpster case and which I luckily brought home with me. The problem was one of encoders was broken, as well as one of the axis counter IC.
Anyway, having a Microscribe and knowing how to use a CAD software, I started the reverse engineering process by digitizing the surface where the feet attach to.
I guided my design through pictures of the HP 8594E, in order to make the front feet look as close to the original as possible and reasonable.
The back feet, however, are considerably different. That is because I actually disliked the original HP design and, also, I had to have print material consumption in mind.
So I designed them a little different, but I think the result is actually pretty good.
I had the feet printed in our office, where we have Markforged printers. I used a Markforged Mark Two with their Onyx material (
https://markforged.com/mark-two/). This material is not the toughest of the available materials, but it is still very robust. In fact, it is unbreakable with your bear hands and can compete with aluminium. The only draw-back is the color: this material is only available in black and it is not easy to paint (I tried on a different component).
So the feet on my device are black instead of white-ish.
The surface finishing and overall tolerance is miles away from cheap 100 Euro China-Clone-Printer. Especially if you spend a moment figuring out what is the most favorable position to print each part (I left that to my colleague who operates the printers).
Attached are pictures and an archive with the STL files. Please note that the front feet are made of two different models - you need to print 2 of each. This is obviously because they are mirrored (Up-Left and Down-Right <-> Up-Right and Down-Left). Obvious? Well, I got the first trial wrong and printed 4 of the same kind...
Good luck!
Regards,
Vitor