Sikor Posted January 12, 2021 Share Posted January 12, 2021 Probably in next 6/7 month. I try made is niversal for A2600 and A7800. First visualisation here I will try to 3D print them within a few days to check the correct dimensions. When everything is ok - let me know and start working on the injection mold. 7 1 Quote Link to comment Share on other sites More sharing options...
Shawn Posted January 12, 2021 Share Posted January 12, 2021 (edited) Can you share a picture of what the label side will look like please? EDIT: Using pegs instead of clips and\or a screw(s) is a bad idea. I share this as someone who has bought and sold thousands of homebrews and reproduction cartridges using all different flavors of shells. Before you invest in a mold please take into consideration the needs of the user base who would be interested in buying these from you. Another guy recently made a mold and he did so making changes to the original design that many of those who would have bought hundreds of new shells did not like and refuse to buy because of it. That is of course only if you intend on selling shells. If this is just for your own needs, have at it as you please Edited January 12, 2021 by Shawn 5 1 Quote Link to comment Share on other sites More sharing options...
Sikor Posted January 12, 2021 Author Share Posted January 12, 2021 4 hours ago, Shawn said: EDIT: Using pegs instead of clips and\or a screw(s) is a bad idea. I share this as someone who has bought and sold thousands of homebrews and reproduction cartridges using all different flavors of shells. Before you invest in a mold please take into consideration the needs of the user base who would be interested in buying these from you. Another guy recently made a mold and he did so making changes to the original design that many of those who would have bought hundreds of new shells did not like and refuse to buy because of it. I made it in shells for Atari 8-bit and - you belive or not - it works perfectly. Of coursw this is early version of this project. Link to Atari 8-bit shells: More info from post #226 Label will be identical as in original Atari 2600 shells. Quote Link to comment Share on other sites More sharing options...
+Starwander Posted January 13, 2021 Share Posted January 13, 2021 Trust me I made an Atari 7800 cartridge shell mold and definitely use the snaps. Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted January 13, 2021 Share Posted January 13, 2021 Lose the pegs and add dust cover openers. 2 Quote Link to comment Share on other sites More sharing options...
+groundtrooper Posted January 13, 2021 Share Posted January 13, 2021 Dust cover openers would be VERY helpful. Quote Link to comment Share on other sites More sharing options...
+batari Posted January 13, 2021 Share Posted January 13, 2021 3 hours ago, groundtrooper said: Dust cover openers would be VERY helpful. They are more than helpful, they are necessary on a 2600! 1 Quote Link to comment Share on other sites More sharing options...
Sikor Posted January 13, 2021 Author Share Posted January 13, 2021 4 hours ago, groundtrooper said: Dust cover openers would be VERY helpful. 1 hour ago, batari said: They are more than helpful, they are necessary on a 2600! Now I know about that. It will be added - I have 6 A2600 jr (all PAL, one from Taiwan, 5 from Ireland), one CA160 PAL and no one has dust cover at cartridge port, so, I miss it. But it will be done - i look on internet for dust covered A2600 cartridge port. Thanks for info. Btw: maybe someone can attach detailed photo with A2600 cartridge port with dust cover? Thanks. Quote Link to comment Share on other sites More sharing options...
+Andrew Davie Posted January 13, 2021 Share Posted January 13, 2021 Look to the 3D printed PlusCart shell for inspiration/ideas on both the dust-door opener pins, and also press-fit pins. Seems to be working very well. 3 Quote Link to comment Share on other sites More sharing options...
Toolmaker Posted January 14, 2021 Share Posted January 14, 2021 1) Those pins will be hard to fill. 2) Remember, you need a draft angle on all vertical walls (including the pins) to ensure that the part is easily released. 3) Counter sunk screws in the center are a good idea. I have modeled the upper half of an Imagic case in Onshape. https://cad.onshape.com/documents/1f5de36771310af3539fde57/w/55ca7edba594262a043b2581/e/960538071e27c1bfd713b311 Quote Link to comment Share on other sites More sharing options...
Sikor Posted January 15, 2021 Author Share Posted January 15, 2021 V2, after few modiffications: My base has original Atari PCB for 2600 and other one for 7800 (broken Food Fight, if I remember). 1 Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted January 15, 2021 Share Posted January 15, 2021 Another peg? I hope you don't plan on selling these and are just making them for yourself. Quote Link to comment Share on other sites More sharing options...
AtariBrian Posted January 15, 2021 Share Posted January 15, 2021 (edited) Who wants those big holes on the front? I sure wouldn't have them. The labels fall or get pushed through. And original shells have the six tabs, three on each side. What is a round about cost for a mold for shells anyways? Edited January 15, 2021 by AtariBrian 1 Quote Link to comment Share on other sites More sharing options...
Sikor Posted January 16, 2021 Author Share Posted January 16, 2021 21 hours ago, CPUWIZ said: Another peg? I hope you don't plan on selling these and are just making them for yourself. Yes, I plan to sell them and they are for pegs. There is no compulsion to buy, in the XE version they fulfill their task perfectly. And yes,some of them for me 19 hours ago, AtariBrian said: Who wants those big holes on the front? I sure wouldn't have them. The labels fall or get pushed through. They are necessary for the correct removal of the dust cover opener. Can be done without them, but the cost of preparing the injection mold increases too. You can also make an opening mechanism like in Atari Warner cartridges, but as above - there is an additional element. And the holes are identical to the original housings for the A7800 (I was based on the housing from Food Fight). 19 hours ago, AtariBrian said: And original shells have the six tabs, three on each side. Yes, and they can break out fairly easily. Additionally, housings with them require screws. The idea here is a screwless closure and a universal housing for the A2600 and A7800. What will come of it? Time will tell. 19 hours ago, AtariBrian said: What is a round about cost for a mold for shells anyways? Between $ 10,000 and $ 12,000. And that's on the condition that there aren't too many corrections. The lack of holes under the label is about 20-25% more (it all depends on how much we want to spoil the rest of the housing to properly bring the ABS). Quote Link to comment Share on other sites More sharing options...
RamrodHare Posted January 21, 2021 Share Posted January 21, 2021 The pegs just don't seem like a good idea. Seems like most people agree on that. With the cost of injection molding, I'd try to make a design people were interested in buying. That's the only way to recoup the investment. That's just my opinion, maybe I'm wrong.. Quote Link to comment Share on other sites More sharing options...
Shawn Posted January 21, 2021 Share Posted January 21, 2021 7 hours ago, RamrodHare said: The pegs just don't seem like a good idea. Seems like most people agree on that. With the cost of injection molding, I'd try to make a design people were interested in buying. That's the only way to recoup the investment. That's just my opinion, maybe I'm wrong.. You are not wrong. Quote Link to comment Share on other sites More sharing options...
Sikor Posted January 21, 2021 Author Share Posted January 21, 2021 Perhaps you are right, perhaps not. The pins are perfect for 8-bit Atari housings, so I will stay with them. In the worst case, I will have several hundred enclosures for my own use ... Quote Link to comment Share on other sites More sharing options...
bah Posted January 21, 2021 Share Posted January 21, 2021 Sikor, I think the pins can be made to work. The major issue from my viewpoint is the large through holes that the label covers. These allow label damage. Perhaps a 3 piece design where the tabs are molded onto a separate part that fits inside the housing. The part and some ribs to hold it in place would not be complicated for the tool designer and may save him the trouble of creating a shut off plane for the metal pins that form the holes. Quote Link to comment Share on other sites More sharing options...
+batari Posted January 21, 2021 Share Posted January 21, 2021 I am agnostic on the side pins but the center pin really should be replaced with a screw hole. I know you did this on an 8-bit shell but keep in mind those shells are small and thick, and the 2600/7800 shells are large with thin walls and really need that screw to help keep the board in place. I will also reiterate the concern about the holes under the label. If it only increases the cost by 20-25% to eliminate them, that is a bargain! 1 Quote Link to comment Share on other sites More sharing options...
Shawn Posted January 21, 2021 Share Posted January 21, 2021 Why people who have decided to make molds with the intent to sell them to others keep going against what the masses actually want to buy is beyond me. Trying to reinvent the wheel is a futile and fruitless effort. 3 Quote Link to comment Share on other sites More sharing options...
Sikor Posted January 22, 2021 Author Share Posted January 22, 2021 9 hours ago, Shawn said: Why people who have decided to make molds with the intent to sell them to others keep going against what the masses actually want to buy is beyond me. Trying to reinvent the wheel is a futile and fruitless effort. Maybe because I already know from practice that 8 out of 10 votes will be contradictory, because everyone sees it differently. Therefore, I make assumptions and I do not change some things, although I do not claim that I do not make mistakes. But only the one who does nothing is not mistaken. Sorry for the google translation, but my english is too weak for me to translate it well myself. 2 2 Quote Link to comment Share on other sites More sharing options...
+Andrew Davie Posted January 22, 2021 Share Posted January 22, 2021 Having gone through many iterations designing a cartridge myself, I feel that I have a good handle on the issues you face when making a good design. It does not seem to me that you are really prepared to listen/adjust your thinking about the design. I, too, think you are making some mistakes. But, so be it. Good luck. 5 Quote Link to comment Share on other sites More sharing options...
Sikor Posted January 23, 2021 Author Share Posted January 23, 2021 On 1/16/2021 at 6:26 PM, Sikor said: The lack of holes under the label is about 20-25% more (it all depends on how much we want to spoil the rest of the housing to properly bring the ABS). Counted; It's about $4500 more ? Quote Link to comment Share on other sites More sharing options...
Zonie Posted January 26, 2021 Share Posted January 26, 2021 (edited) When I was thinking about developing them, I considered putting in screws in the lower corners under a removable cover, and not under the label. Why? As a hobby part, they didn't have to be uber cheap to assemble like mass produced parts, and this would facilitate taking them apart to change things if so desired. The removable cover would also allow for access to dip switches or whatever a homebrewer saw fit to put under it. I also would make the label end not split up the middle, but be complete and part of one half, or a third part like these Serpac project cases in the attached pic. This would preserve the end label upon disassembly and also facilitate connectors, and such to be easily added. Edited January 26, 2021 by Zonie 2 Quote Link to comment Share on other sites More sharing options...
Sikor Posted January 26, 2021 Author Share Posted January 26, 2021 (edited) Ok, no holes under label. Edited January 26, 2021 by Sikor added space bar Quote Link to comment Share on other sites More sharing options...
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