Capcom CPS3 Arcade Security Cartridge Housing and Battery Replacment Jig
by twistedsymphony, published
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This is a replacement cartridge housing for Security carts used on Capcom System 3 (aka CPSIII) arcade hardware. There are essentially 3 configurations of the files here each with a unique purpose.
The standard front and back housing are designed to be used with reproduction security cartridges or modified "Super Bios" cartridges that do not have a battery. Since the reproduction cartridges don't have a housing to go with them hopefully this 3D printed housing will serve as a useful alternative to stealing one from an original cartridge.
The back housing with a "Battery window" includes a cut out designed to accommodate the large battery that sticks out the back of an original, un-modifed security cart. the window is elongated to the left to accommodate a larger replacement battery that may use the larger foot-print solder points. this also allows you to easily see the production month/year of the battery for easily determining when a replacement might be needed.
- The "battery replacement jig" variants of these parts are to help facilitate a live (powered) battery swap, by providing stabilization to the cartridge PCB and reduce the risk of power loss during a battery replacement which could kill the cartridge.*
*NOTE: please test the stability your printed jig provides before attempting a battery swap, not all 3D printers will provide results consistent with my own. As such I assume no responsibility if a jig printed using these files does not hold the cartridge tight enough to prevent power loss during battery replacement. Use this at your own discretion.
Walls are designed for a 0.40 or smaller nozzle.
I used 0.2mm layer height and 20% infill percentage but it doesn't matter much as it's nearly all thin walled structure.
You MUST use supports on the "back" half parts as the cutouts for the screws will need to be supported.
The "front" half parts have two small clips with a few mm of overhang; generating supports here is recommended. If you print without supports here you may need to trim some drooping material and you may end up with the assembled cart housings not holding completely tight at the top.
The parameter of the front and back halves are designed to interlock together if there is any over-extrusion in these areas it may cause problems with the two halves mating so if your printer doesn't produce completely clean prints you may need to clean up any over-extrusion on this "lip" with a razor.
The two screw holes are designed to be used with screws similar to the original cart security screws. You can of course go with a philips head for ease of use or a stylish cap-head for a nice look, as long as they are dimensionaly similar. You'll want a thread-forming screw with a ~3mm diameter 8mm thread length and a ~5mm head diameter. Machine screws will work too but may be a bit tight.
How I Designed This
These 3D printed cart housing halves are NOT designed to be exact replicas of the original cart halves. Instead they're designed to have similar envelope dimensions, enough such that one of the 3D printed car halves can be used with one of the original cart halves if need be. They will also fit within the CPS3 metal cage housing and cartridge clamps.
Overall when compared to the original cartridge housing this design is setup to be more amicable for 3D printing with fewer overhangs and reinforced walls and screw posts.
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Capcom CPS3 Arcade Security Cartridge Housing and Battery Replacment Jig by twistedsymphony is licensed under the Creative Commons - Attribution license.
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- You must attribute (give credit) to the creator of this Thing.
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