Commodore Vic-20 Cartridge Case
by CNK, published
Get the feeling I'm choosing the least common machines to make cartridge cases for?
Introducing a 3D printable cartridge cases for the Commodore Vic-20 home computer of the early eighties.
I'll admit the Vectrex cart I uploaded before is probably a better design, but it works and that's good enough for me. Also, this case is based on the "Raid on Fort Knox" cart you see in the images, ruthlessly ripped apart for the purposes of this project.
As with the Vectrex cart, I used Pro/Engineer's now deceased sibling, Pro/Desktop to design the models and have uploaded the ".des" design files. I also put up my measurement notes, again to be given about the same trust as the average politician.
While I have the chance, I'll just say that you do have to break some (or at least, the "Raid on Fort Knox") original cartridge case to get into them, despite how co-operative it looks with those screwdriver slots on the bottom. There is a lug inside the right side of the cart that has to be broken. It took me ages looking on the net to be sure of this.
Now that I've cleared my two cartridge case backlog, this will probably be my last one for quite a while.
Prints pictured were made with a good old Makerbot Cupcake CNC. Long live Cupcakes!
I actually made this model before the Vectrex one I uploaded recently, about a year ago in fact. As a result, I'm half guessing about the details as my memory has well and truly faded.
Anyway, it's mostly obvious. The two halves were too big for my Cupcake's build platform, so I split them into four more manageable pieces, then glued them together using that rather visible hot melt glue. If you have a machine that can print small buildings in a single bound, just use the whole models. I somehow got away without a raft for version one, but must have lost my touch because by version three (thankfully the last) I hadn't a hope of going raftless.
Well once you have the two halves (or perhaps the halves of them) in materialised form, you can print out "Board Rotation Stop" (at the end of the downloads because I almost forgot it). This is my cheat for getting the board stopper where it needs to be to mach the dimensions of the board. Get it in the right spot and glue well while admiring my poor design. I did this because I know there are a lot of board sizes out there, but don't want to destroy all my Vic-20 cartridges to find out what they are. If you have a big board, the flat bit of the stopper should slip under the board to give you more room. Though, really how well it works with big boards is a bit of an unknown for me.
The screw hole should be 3.3mm. My printer swelled it up a bit so I think I used a screw about the same diameter and 10mm long.
Once you're done, do your usual wrestle with the back of your Vic-20 to get the cart in (hence why you should do a good job gluing the board stop), and enjoy the marvels of vintage computing.
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Commodore Vic-20 Cartridge Case by CNK is licensed under the Creative Commons - Attribution - Non-Commercial - Share Alike license.
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