Part II - Making A TRS-80 Model 12 Seven-Slot Card Cage

Part II of the TRS-80 Model 12 card cage project. Now that the revised parts have been printed, let's test-fit them. But...there's a rub: There was an issue during printing and the parts aren't quite right. Let's see if we can use them to test how well the revised cards fit despite the anomoly or not. After a re-print, we do another test fit and find some additional issues which need to be addressed in another revision. And in the spirit of things going wrong, my 3D printer breaks down as well. Learning new things takes focus, trial and error, and persistence. I'm hoping these videos really highlight the amount of work designing a seemingly-simple part can be.

Music/SFX (in order):
None

Chapters:

Intro / A Look At The Parts (0:00)
Anomolies In The Print / Verifying Fan Screw Revisions (1:57)
Chassis / Fan Test Fit (4:51)
Card Test Fit (7:30)
Another Day / 3D Printer Issues (9:09)
Why These Parts Still Aren't Right (11:10)
Fan Mount Issues (15:48)
What's Next / Outro (18:48)
But Wait, There's More! (20:50)

I do these videos unscripted, so I apologize if the in-the-moment descriptions of things are a bit scattered. If you have any questions/comments about this video, you can find me in any of these fine locations:

The Tandy Discord Server
The CoCo Nation Discord Server
The TRS-80 Color Computer (CoCo) group on Facebook
The CoCo Crew Podcast group on Facebook
The TRS-80 Models I-4/4P Group on Facebook
Tandy / Radio Shack Model II /12 / 16 / 16B / 6000 Owner's Group on Facebook
Twitter (I'm TJBChris there...)
The Level29 BBS (I'm TJBChris there, too.)
Particles BBS (Guess who I am here? Yeah, TJBChris.)

Thanks for watching!

[PixelPipes]

Nut holes is what I needed to hear to click like.

[geekwithsocialskills]

I see you are enjoying a Barq's Zero Sugar root beer. Very nice. Have you tried the A&W Zero Sugar root beer? It's now one of my favorites. P.S. nicely done on yourTRS-80 Model 12 seven-slot card cage. It's the beez neez 🙂

[derek]

You're not going to be happy until it's the size of a mainframe are you? 😁

[Daveyk]

This works because you have a backplane. I can't imagine that they are easy to get. You designing a backplane PCB? Can you even get edge card connectors anymore?