(Topic ID: 244666)

JJPOTC Treasure Chest Open/Close mod, now working!


By pinballj

76 days ago



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  • 735 posts
  • 82 Pinsiders participating
  • Latest reply 1 hour ago by arcadem
  • Topic is favorited by 77 Pinsiders

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Topic index (key posts)

3 key posts have been marked in this topic

Post #7 Working prototype video Posted by pinballj (69 days ago)

Post #185 Everything needed to make your own chest-opening mod... Posted by pinballj (53 days ago)

Post #615 Code for lighting mod controller Posted by harryhoudini (6 days ago)


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There are 735 posts in this topic. You are on page 1 of 15.
19
#1 76 days ago

I am working on a mod for opening and closing the treasure chest on JJPOTC that I thought I would share my progress on!

I got a prototype working this evening, but it is a REAL prototype (it will break in about 10 more tries lol), as I did a fast print with the 3d printer for sizing and proof of concept.

Here it is in action:

Now it may not look like much movement, because there is not right now. I need to make a slightly longer linkage (it is on order), and I need to make a new bracket for the chest lid. This mod is completely reversible too (no additional drilling, etc reqd).

Similar to how the prototype JJPOTC machines worked, the chest lid is closed when the fork ramp is down. When the fork ramp is raised, the chest lid will slowly open (adjustable in software of course).

The two pictures without the 3d printed bracket I included to show the fork mech screw holes that I plan to use to mount the bracket, as well as the existing slot through the playfield that nothing goes through (maybe that is where the original mech linkage was located at?).

I will do my best to keep progress documented here, but source and design will be available here too:
https://github.com/jfleitz/jjpotc-chest

Rough cost estimate in parts about $25. I am hoping on having this done in the next couple of weeks to where I will make a second one and see if Antz at Zanzabar will let me try it on his CE on location.

I have no clue if this will cause additional ball rejects, but I wouldn't think it would. If it did, I can always adjust the "close height" so that it doesn't close all of the way.
mounted-on-fork1 (resized).jpgmounted-on-fork2 (resized).jpgpf-slot (resized).jpgproto1 (resized).jpgproto2 (resized).jpgscrew-holes (resized).jpg

#2 76 days ago

Good job. I new it could be done.

#3 76 days ago

Wow...awesome

I will want one!

#4 76 days ago

Glad you're working on this!

#5 73 days ago

Cool, favorited the thread and look forward to updates.

24
#7 69 days ago

The treasure chest now fully opens and closes now!

From the Proof of Concept, I had to make the following changes:
1. Change the 3d printed bracket for mounting the micro switch in an angle (similar to the microswitch that already exists toward the playfield)
2. Make a new metal bracket to replace the "fixed position lid bracket".
3. Using a m3 threaded end rod for the servo linkage.
4. Adjusted the open angle in software
5. 3d printed a new cover for the solenoid gate behind the treasure chest to make room for the hinge

I am going to test this a bit (finally have the game back together! I have been having JJPOTC withdrawls lol), before updating the instructions and BOM for building this.

-Jeremy

#8 69 days ago

Very nice!

You planning on selling kits?

#9 69 days ago

I'm in, if you ever make a run of sets for sale please count me in.
Great great work!!! This one blew me away, great job - again.

Cheers !

#10 69 days ago
Quoted from Psw757:

Very nice!
You planning on selling kits?

I was thinking about it, but it will need a lot of testing. It isn't too bad to install except for taking the top of the chest off, and then putting it back on with the hinge.

However, just playing a few games...it is pretty cool with the "chest opening sound playing while the lid opens"

For testing, I talked with the owner of Zanzabar (Antz) who has a CE on location, and he is all in for letting me install it for heavy testing.

I am definitely not in this for money, so the bill of materials, where I bought each part, and the stl files for the 3d printed parts will be published after testing.

#12 69 days ago

Followed! Nice work!!

#13 69 days ago

Wow great job! I’m excited for this.

#14 69 days ago

Super cool, nice work!

#15 69 days ago

Awesome sauce Jeremy!

#16 69 days ago

Very cool. I think just about every JJPPOTC owner would be up for getting this installed on their games.

#17 69 days ago

Fantastic! Very much looking forward to this.

#18 69 days ago

Out of curiosity, does anyone know how the original chest mech worked? If it could somehow inherit it's motion from the chest fork, rather than run on its own motor, I think it would be cool.

The chest fork mech motion has a bit of "attitude" to it, in how it goes up slightly before it slams down.

#19 68 days ago
Quoted from zaphX:

Out of curiosity, does anyone know how the original chest mech worked? If it could somehow inherit it's motion from the chest fork, rather than run on its own motor, I think it would be cool.
The chest fork mech motion has a bit of "attitude" to it, in how it goes up slightly before it slams down.

I think it was directly linked somehow to the fork mech. If you watch the earlier twitch streams when it was there, the motion of it opening was fast and closing fast. I thought about going down that path myself, but thought if after all of the testing JJP decided it was causing ball rejects, maybe the fork was not lifting all of the way all of the time... to just use a separate motor.

But I guess to answer your question, I honestly don't know LOL.

#20 68 days ago
Quoted from pinballj:

I think it was directly linked somehow to the fork mech. If you watch the earlier twitch streams when it was there, the motion of it opening was fast and closing fast. I thought about going down that path myself, but thought if after all of the testing JJP decided it was causing ball rejects, maybe the fork was not lifting all of the way all of the time... to just use a separate motor.
But I guess to answer your question, I honestly don't know LOL.

You know, for the longest time chest shot rejects were caused by the fork mech getting loose. It would be a shame if the opening chest was junked without being the actual cause.

#21 68 days ago

Love this. Fantastic mod!

#22 68 days ago
Quoted from zaphX:

You know, for the longest time chest shot rejects were caused by the fork mech getting loose. It would be a shame if the opening chest was junked without being the actual cause.

Well that is an excellent point. Now I kinda want to go back to the drawing board and make a simpler mod

#23 68 days ago
Quoted from pinballj:

Well that is an excellent point. Now I kinda want to go back to the drawing board and make a simpler mod

Well think of it this way, we have one solution that definitely works. Maybe there's another that also works without needing a servo, switch etc! I would be really interested to see the original mech...

#24 68 days ago

I want one!

#25 67 days ago

Great work!! If you sell I'm in!

#26 67 days ago

Yeah I think I will have to get one of these. Two thumbs up!

#27 67 days ago

I hope you decide to make some kits and sell!

I want one, price it so it’s worth your time.

#28 67 days ago

Awsome sure hope you make some kits

#29 67 days ago

Looks good. Interested.

#30 67 days ago

money....take it.

#31 67 days ago

Great Mod!

If you decide to sell Kits i will be in for sure.

#33 67 days ago
Quoted from pinballj:

The treasure chest now fully opens and closes now!
From the Proof of Concept, I had to make the following changes:
1. Change the 3d printed bracket for mounting the micro switch in an angle (similar to the microswitch that already exists toward the playfield)
2. Make a new metal bracket to replace the "fixed position lid bracket".
3. Using a m3 threaded end rod for the servo linkage.
4. Adjusted the open angle in software
5. 3d printed a new cover for the solenoid gate behind the treasure chest to make room for the hinge

I am going to test this a bit (finally have the game back together! I have been having JJPOTC withdrawls lol), before updating the instructions and BOM for building this.
-Jeremy

IM IN!!

#34 67 days ago

my prayers have been answered! Yes please!!!

#35 67 days ago

Looks great. This will be a must-have mod.

#36 67 days ago

Put me down for two when its ready.
Thanks for making this happen. So cool.

#37 67 days ago

I’m in as well if you sell them. Very cool!

#38 67 days ago

Amazing!

Hopefully you can sell these... It seems almost unfair to make pirates even better.

#39 67 days ago
Quoted from BC_Gambit:

Amazing!
Hopefully you can sell these... It seems almost unfair to make pirates even better.

The sooner the better so we can all test them for JJP for the next 6 months in the real world and Eric can get his open/closing chest on the LE re-run once it's proven durable and JJP makes a deal with Pinballj for solving their engineering puzzle.

#40 67 days ago

WoW! Great engineering here, cant wait for you to get these out as a mod or print file.

#41 67 days ago

Very cool!

#42 67 days ago

One for me please!

#43 67 days ago

That is a dream mod, please go forward with it and make it happen. I am in for sure.

-1
#44 67 days ago

When I lock a ball can it go up and down like the cookie monster?

No; like Trex in JP

#45 67 days ago

I'm in. Got to be worth you making these given the interest.

#46 67 days ago

I want one and dont even own a pirates.

#47 67 days ago

Everyone. The OP says he does not want to make it for you and sell it. He says he will give instructions a material list and the 3D stl files. So stop all saying that you want to buy it from him (unless he changes his mind)

#48 67 days ago
Quoted from gumnut01:

Everyone. The OP says he does not want to make it for you and sell it. He says he will give instructions a material list and the 3D stl files. So stop all saying that you want to buy it from him (unless he changes his mind)

I definitely want to buy one. I'm in.

#49 67 days ago
Quoted from delt31:

I definitely want to buy one. I'm in.

Made me laugh!

#50 67 days ago
Quoted from gumnut01:

Made me laugh!

Haha I get your point though. Hopefully OP changes mind or someone takes these like mod couple and sell them

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