3D Printing Monitor Adjustment Tools

CRT Adjustment tools are often made from Nylon or Plastic. Being a natural insulator, it decreases your changes of shorting out something within the monitor chassis. Being made from the same material as the adjustment pots, it prevents you from damaging the on-board adjustment pots with sharp metal tools. Finally, some adjustment coils (like the horizontal width adjustment coil on common G07 & K4900’s) are often ferrite core - metal tools can demolish them.

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Before I set out to create one, I did a quick search and found this set:

https://www.thingiverse.com/thing:1802360/files

2.5mm is close enough to the .100” adjustment tool for a horizontal width coil adjuster.

I scaled it on the y-axis to give myself a little room to maneuver around the yoke assembly.

I scaled it on the y-axis to give myself a little room to maneuver around the yoke assembly.

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Slot head for nylon adjustment pots

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For the nylon adjustment pots, a small flat-head tool is handy.

I found this one and scaled it down to about 25% of the original design size.

https://www.thingiverse.com/thing:3916160/files

3D Printing Connectors

The connector dilemma.. How often when working on games do you find yourself in the position of “dangit, I need connector x in order to be able to proceed.”

On the hack side of the decision matrix you can go with twisted connections, solder and shrink tubed, electrical tape or wire nuts.


On the OCD side of the decision matrix you place an order for the connectors, pay $8 in shipping for $5 in parts and have to wait a week for them to arrive so you can finish your task.

Eventually, you end up with something like this.   Varied pins and housings.  Some for DC applications, some for AC applications.

Eventually, you end up with something like this. Varied pins and housings. Some for DC applications, some for AC applications.

Once you get bitten by the “I need this one part” bug enough times and you end up over-buying spares or mixed-lots that include dozens of varieties of pins and connectors.

 

Cost Considerations

$.14c in material cost for a connector is a pretty decent deal.

$.14c in material cost for a connector is a pretty decent deal.


Working on Ice Cold Beer, I recall paying ~$8/each for the 18 position dual-leaf PCB edge connector housings and around $70 for 30Au Gold 22-26AWG pins. (Sourced from arcadepartsandrepair.com )

Working on my first pinballs (Data East Star Wars, Sega Star Wars) I recall waiting a week for appropriate .156 IDC connectors or .156 molex-equivalents to improve interconnect reliability.

2 or 3 position Molex connectors are often used in arcade / pinball power or modding situations. I’ve paid $.50c up to $2 for individual Molex connector pairs. $.14c for a 3D printed pair in under an hour is pretty nice!

 

Originality Vs Pragmatic Convenience

Detail-oriented collectors might focus in on sourcing exactly the right connectors, something like the Red AMP connector that was manufactured in the middle-80’s. Profit-oriented operators would often direct-solder wires to board pins or use electrical tape and shrink tubed solutions in order to keep their amusement machines in service.

I’m not wholly opposed to a wire nut or compression slice with the justification that most of the wiring in our homes use these methods inside of electrical boxes for switches and plugs.

But mostly for arcades and pinballs I try to use connectors when it makes sense.

Finding Models

Connector-housings are actually pretty easy to “eyeball and approximate”. Taking measurements or looking at the spec, there are alot of connector-housing models on thingiverse to support peoples’ electronics projects. The two sets I found below were some of the most impressive in terms of quality and closeness to originals.

3-pin Molex
https://www.thingiverse.com/thing:4139433
https://www.thingiverse.com/thing:4131380

2-pin Molex
https://www.thingiverse.com/thing:4139450
https://www.thingiverse.com/thing:4139409

Searching around, it turns out the CAD models for Molex (and other) connectors are available from the official sources

For example, the commonly used .093” pin connectors often found on the AC lines of arcades:

Plug Side
Receptacle Side

Broader categories
- you will recognize alot of these from wiring harnesses in cars, common appliances in addition to arcade and pinball uses.

AMP Dual Leaf 28 Position (like a JAMMA card edge connector)

The file formats are common CAD formats that can be converted to printable .STL files pretty easily.

I’m not sure around the legality of using them but for the sake of this post we are going to assume hobby use one-offs won’t be a problem.

Finally, GrabCAD has a really handy library of all sorts of engineering CAD models, connectors included.

FINDING THE CONDUCTORS

There are so many different connector and mating-conductor standards used in Arcades & Pinballs, I’m not going to even attempt a comprehensive list but here are a few that you will probably run into frequently.



MOLEX .156

Molex .156 are often used in Arcade monitors (RGB, G, Sync) connections. The .156 size is also what most Bally, Williams, Data East, White Star, Sega and SAM Pinballs use for power interconnects. Though the pinball applications are typically as IDC (vampire tap-style) connectors. Molex is a solid upgrade and will mate perfectly with the .156 header pins on those boards.

https://www.aaarpinball.com/TwilightZone/TwilightZone.htm

https://www.aaarpinball.com/TwilightZone/TwilightZone.htm

https://www.flippers.be/basics/101_general_illumination.html

https://www.flippers.be/basics/101_general_illumination.html

Yellow one is .156 spacing, red one is .100 spacing.

Yellow one is .156 spacing, red one is .100 spacing.

http://www.ukvac.com/forum/connector-idsolvednow-id48-drive-board-versions_topic359385.html

http://www.ukvac.com/forum/connector-idsolvednow-id48-drive-board-versions_topic359385.html

Molex .100 are often used for lower voltage interconnects or in cases where component spacing was tight on the original board designs. Stuff like, Controlled Lamp to Cabinet Harnesses for Pinball and IO interconnects on some arcade cabinets.

https://www.arcadeshop.com/search?q=.100

https://www.arcadepartsandrepair.com/product-category/connectors-sockets-pins/100-kk-molex/

MOLEX .093

https://primetimeamusements.com/tech-tips-monitor-issues/

https://primetimeamusements.com/tech-tips-monitor-issues/

https://www.pinballlife.com/power-tap-and-8-way-power-splitter-board-for-williamsbally-wpc-pinball-machines.html

https://www.pinballlife.com/power-tap-and-8-way-power-splitter-board-for-williamsbally-wpc-pinball-machines.html


Molex .093 are very commonly used in 2 position and 3 position AC applications in arcades. Usually from a power tap before the isolation transformer running to the marquee light.

https://www.arcadeshop.com/search?q=.093%22

https://www.arcadepartsandrepair.com/product-category/connectors-sockets-pins/093-molex-connectors/

AMP and MOLEX Leaf Connectors

https://www.youtube.com/watch?app=desktop&v=WYi6_xv1mSY

https://www.youtube.com/watch?app=desktop&v=WYi6_xv1mSY

https://www.instructables.com/install-a-JAMMA-harness-in-an-arcade-cabinet/

https://www.instructables.com/install-a-JAMMA-harness-in-an-arcade-cabinet/

These edge connectors are the basis behind the JAMMA 56 pin card-edge connector found in many arcades.
Taito’s Ice Cold Beer uses three partially populated 36 pin card-edge connectors. I’ve also seen them used as beefy interconnects between some multi-board stack arcade PCBs.

https://www.arcadeshop.com/search?q=edge

https://www.arcadepartsandrepair.com/product-category/connectors-sockets-pins/edge-connectors/amp-twin-leaf-edge-connectors/


That’s enough to get you started though there are obviously others. As like most things in the electrical component space, you can also find these things at mouser.com, greatplainselectronics.com, digikey.com and other electronics suppliers. Personally, I try to support arcade and pinball specific suppliers when shipping is convenient and pricing isn’t out of hand.

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A Note ABout Materials

Did you know PLA thermoplastics come from corn? PLA is formed from the sugars in corn starch by immersing corn kernels in sulfur dioxide which breaks down the corn into starch, protein and fiber components. Sort of like a fermentation process.. The oils are extracted into long-chain polymers that behave similarly to fossil fuel byproducts that can be made into plastics, polystyrene and textiles.

The most common thermoplastics used in 3D printing tend to be great insulators. The exception being, any filaments that might be reinforced with metal fibers and some carbon-fiber composites. Heat is the largest concern. You wouldn’t want to use 3D printed connectors in a service environment where it might be exposed to heat greater than the material tolerance.

PLA is a solid electrical insulator but only within a nominal temperature range. You can use PLA but understand that applications above 125F degrees carry risk as PLA starts to break down and loose structure at higher temperatures.. A moving truck or storage unit can reach temperatures of 120F degrees. You can use PLA to print connectors but it isn’t the first choice for electrical applications.

ABS can keep its properties above 200F Degrees. going to have similar temperature properties to PLA but a flatter melt-curve at the melting temperatures. (It will deform less)

PETG falls between PLA and ABS with support of temperatures up to around 160F degrees.

Nylon, which also support 200F+ Degrees (often much more) is commonly used in electrical applications. Wall plates, even some electrical wall boxes are constructed from Nylon or Nylon composites.

I make most of my connectors from Nylon, ABS, PC, or sometimes enhanced PLA. (ToughPLA or PLA+)

Christmas Vacation

Using the AmuseLabs PuzzleMe Builder, I created a Crossword based on Christmas Vacation. Want to try it?

One funny aspect of Lampoon’s Christmas Vacation is how people relate to it. Do most fathers relate to Clark and most mother’s relate to Helen? Or.. Do people come down on Eddie & Catherine being the more relatable of the bunch?

I think, most days, even in my early 40’s, I find myself inhabiting one of the Griswold kids. In that role, Christmas just sort of “happens” to me and seems to be out of my control, ostensibly the adults are in charge, right? Some days, I find myself rebuilding a toilet apparatus on the back deck on a 30 degree day and for some reason I’m wearing shorts. My inner Eddie is just below the surface.

https://altonbrown.com/recipes/aged-eggnog/

https://altonbrown.com/recipes/aged-eggnog/

Some days my inner Frank Shirley has had enough of the hearing the same ancient songs on the radio and I’m just ready to get back to the normalcy of the other 11 months of the year. Other days, I channel my inner Clark and tend to overdo the sentiments and search of perfection. The perfect gift… the perfect holiday meal, the perfect holiday moment. A fool’s errand but at least there’s help to be had from Jack Daniels.

I have this theory that the more dysfunctional your childhood was, the more you enjoy and relate to this movie. Whether you love it or hate it, whether your Christmas bonus is the stuff of pensions or the spreadable stuff for morning toast lovers: I hope you find a way to have a good Christmas and Near Years and enjoy yourselves.

Cheers!

Ready Player [n]

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Ready Player One (2011)

Members of the Oculus Quest team were all given copies of Ready Player One and they lifted many concepts from the book in their hardware and software design for the Oculus VR.

As I mentioned in a movie review post a couple years ago, Ready Player One is the sort of book that seemed to be genetically engineered to induce a nostalgia brain-boner for the inner kid in someone like me.

Ready Player One starts in an exposition-filled introduction where the main character, Wayde Watts, introduces the reader to a dystopian vision for the near future in 2045. Wayde is a resourceful kid without much opportunity, relegated to trailer park life in the outskirts of Oklahoma City. Work is scarce, food isn’t plentiful and the times are dangerous. An energy crisis, wars, famine & economic turmoil have ravaged the comparably comfortable society that we currently inhabit. Things are hard, especially for the least fortunate among us and the rich and poor alike seek distraction from the harshness of reality in a Virtual Reality MMO called The OASIS.

One of the OASIS’s cofounders, an eccentric high-functioning autistic genius billionaire named James Halliday, has died. His death triggers a multi-year virtual scavenger hunt to collect keys & solve challenges in search of an Easter Egg hidden somewhere inside the OASIS. These objectives are tied to the co-creator’s passions and interests, which are mostly anchored in 80’s nerd culture. This necessitates a planet-hopping, multi-year adventure that is densely packed with pop-culture references, fueled by 80’s nostalgia and performed by a cast of sympathetic characters. The winner will inherit Halliday’s fortune and control of the company that runs the OASIS, GSS.

Some combination of narrative connective tissue with the protagonist and Halliday and myself has led me to read the book numerous times on paperback or e-Book. Some of the specific references in the book (Joust, Wargames, Pac-man, Zork, Monty Python’s Holy Grail) ring the bell to bring out my inner 10 year old. That BBS-hopping, BASIC text-adventure-game-making nerd kid was me. When I wasn’t playing in the woods or in the tire-fields around our trailer, I was on the C64 spending hours on Aztec Challenge, Lode Runner, Donkey Kong, Law of the West & Snokie

When I first heard that Spielberg was going to be helming the film project, I was really hopeful that the movie would be a hit. It was commonly accepted that a direct translation of book to movie wouldn’t be feasible on terms of product licensing, alone.

The hook for me in the original story was the kid-adventure aspect of discovery of the Tomb of Horrors. It had the “treasure in your backyard” Goonies vibe as Parzival came to the realization the first key was hidden on planet Ludis, accessible to him despite his low-character strength and lack of wealth.

I never would have guessed that the writer of Goonies would opt instead to eliminate the entire “kid adventure in your backyard” vibe in favor of a CG-Fueled Death Race clone with no real soul or story. I would liked to have been a fly on the wall for how that came to pass.

Any chances of seeing Parzival traverse the Tomb of Horrors to ultimately confront Acererak in a Joust match are now relegated to fan-creations.

 
Epic fan art concept by Cole Marchetti

Epic fan art concept by Cole Marchetti

In preparation for the release of Ready Player Two, I watched the film again and listened to the audiobook.

This time, watching the film, I was able to appreciate it a little more as a standalone creation though I still miss the arcade video game references that were cut in favor of more recognizable pop culture fair. Decision by committee, I get it.

I really would have liked to see more classic arcades in the film, I really would have liked to see Parzival’s asteroid stronghold and a final battle closer to that of the original story. I’m mostly okay with the idea of remixing Wayde’s time as a shaved-like-a-naked-mole-rat IRL reclusion and infiltration into IOI with Art3mis’s movie plot. It makes Art3mis a stronger character, a fierce and independent young woman that will be far more interesting in the next movie, if they make one.

The audio book form of the original book is a treat. It is narrated by Wil Wheaton; the perfect choice for this material. It clips along at a good pace and is perfectly suited for the audiobook platform. Mr. Wheaton also narrated Armada, Ernest Cline’s love letter to The Last Starfighter.

 

Ready Player Two (2020)

Ready Player Two kicks off a few days after the close of Ready Player One’s storyline. Even though it continues from the book narrative it felt more like a screenplay for a second movie than a standalone sequel novel. Like the first novel, Ready Player Two’s primary narrative resolves around a scavenger hunt based on the original GSS founders’ obsessions. They do this while adjusting to their new positions of authority within GSS and over the OASIS and through the backdrop of their evolving relationships.

Wil Wheaton performs the audiobook narration and does an excellent job. He really has grown in skill as a narrator since the first book. This time around, when he inhabits the character of Wayde Watts, he does so in the beginning with a junky-like espresso-fueled excited rambling energy that really comes through in the performance. I found myself more than once checking the playback speed to see if it was still on 1x. That choice.. was a masterful one considering the storyline.

Without specifics and spoilers.. The stakes are huge and the storyline dips into numerous compelling contemporary concepts. Certain Characters are given a chance to grow and shine and some of those aspects will be fascinating to see on screen if this story is ever translated to film. Other characters’ idiosyncrasies get brought into daylight, sometimes to an uncomfortable degree but ultimately in service of the larger plot. That too, will be interesting to see in the market-tested, rounded and safe version that one days makes it screen. Spielberg has stayed in touch w/ Cline over the creation of the second book and even made a request of him concerning one of his favorite characters.

Ultimately, I liked Ready Player Two but I didn’t love it. The number of pop culture references per minute are cut considerably down and many of those chosen for this book didn’t resonate with me as much as the first. This book is a little more sci-fi concept with some D&D references, light on video games and heavier on 80’s pop music and film.

Just like the Ready Player One movie, this vision for Ready Player One Two may resonate with a broader audience by moves similar to swapping Zork for The Shining. Ultimately, it bums me out b/c the obscure, specific video game references from my childhood made Cline’s 1st book seem like it was written for me.

This? Not as much. Don’t get me wrong, I’m down for Cline’s world view and the central premise on this story and I think he’s a great storyteller and world builder. I just wanted more sprites and quarters in this escapism and less reminder of things like pandemics, broken governments and Purple Rain. YMMV. :)

Ready Player… Crossword

Using the AmuseLabs PuzzleMe Builder, I created a Crossword based on Ready Player One. Want to try it?

3D Printed Scared Stiff Slings (cont’d)

About a month ago, I started down the path to try to create:

(in my best sarcastic George Carlin voice) Scared Stiff Inspired, Slingshot Alternatives

You can follow along the first part of this adventure by clicking here.

front: single color extruded, masked then painted  back: dual extrusion Red and Grey Kodak PETG.

front: single color extruded, masked then painted back: dual extrusion Red and Grey Kodak PETG.

First, I tried a transparent red PLA from 3D Universe and dissolvable PVA for supports.
This yielded a really decent single-material result, though the inclusion of PVA pushes up the build cost by a couple bucks.

-Not a huge deal, these are just for me… or friends that ask for them but it also takes a bunch of time to clean up the PVA boogers or let them dissolve all the way. It ties up a build plate for 12-24 hours while it dissolves.

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But what I really wanted to do is to get a decent dual-extrusion print template, separating out the transparent red from the original from the opaque parts. The idea being, if I could match the red translucent and print the rest in grey, each one is just a little detail paint work away from being closer to the originals.

In order to do multi material / multi extruder prints, you need a model that dissected into pieces.

Though not perfect, I eventually ended up with decent enough cutouts for a multi material print.

Though not perfect, I eventually ended up with decent enough cutouts for a multi material print.

Getting the model broke into components pushed the limits of the capabilities of Shapr3D and my skills in this arena. Shapr3D doesn’t give you a great way to perform contoured or free-hand cuts so I ended up duplicating the model into three copies and erasing away portions of the model with varied overlapping edit-cylinders used to mask out subtraction zones.

I tried an EDU copy of Solidworks as well but I have more learning in that area before I can be effective. A couple days ago, I ran across Mesh Mixer, which may end up being a better solution for my use case in the future.

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Kodak makes filament? Yep and it is really quite decent too. Good price, the spools have smooth cylinder walls and roll well and the material properties are very consistent. They are even food safe.

I’m mostly okay with the luminosity of the translucent PETG. The color is a little off from the original but a stickler could print on clear and used translucent hobby paints to tint in the red.

I’m mostly okay with the luminosity of the translucent PETG. The color is a little off from the original but a stickler could print on clear and used translucent hobby paints to tint in the red.

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I still need to paint the feet lime green but so far my play testing set is holding up.

I still need to paint the feet lime green but so far my play testing set is holding up.

Have a Scared Stiff and need slings? You can pull down my models from here:

https://www.dropbox.com/sh/0t7wzhce1593ljl/AABL449nCkC3ols3Zp2hge2ba?dl=0

(please note the current prototypes still have a few small flaws but they are definitely playable)

Williams Indy Roto Lock

On Williams, Indiana Jones: The Pinball Adventure, the Roto-Lock is a plastic ball diverter atop a metal shaft connected to a coil. It is used in the rotating idol mech to dispense and lock balls.

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When it breaks and you try to find a replacement, you might see the same thing I did. Some guy trying to sell a used one for $75 on eBay.

I thought: $75? No way! I want to spend $3500 for that part and get threatened with a lawsuit, so maybe I can pay my attorney a couple thousand too and bring the TCO to around $6500.

Yea, Let’s do that, instead. Companies apparently don’t like you 3d printing their parts even though they aren’t making them available for purchase.

(sarcastic guy, is sarcastic)

youre-telling-me-it-costs-how-much.jpg
 

So, I reproduced the part for my personal pinball machine and created a model so I can print a spare whenever I want.

IMG_4151.jpeg

Because my caliper-based measurements are always off by a few fractions of a mm, I glued, taped and painted a broken original and scanned it in.

Because my caliper-based measurements are always off by a few fractions of a mm, I glued, taped and painted a broken original and scanned it in.

Using the scan to get measurements and angles exactly right, I recreated the part out of primitive shapes

Using the scan to get measurements and angles exactly right, I recreated the part out of primitive shapes

It took several test prints, I had some sort of vertical dotted line that would appear in the prints but not the model.   I eventually solved for this by fusing the primitive shapes in the model into a single body.

It took several test prints, I had some sort of vertical dotted line that would appear in the prints but not the model. I eventually solved for this by fusing the primitive shapes in the model into a single body.

After a bunch of test prints, I finally got a usable result and fit-tested it.

After a bunch of test prints, I finally got a usable result and fit-tested it.

The original part is translucent yellow.  I’ll probably grab a roll next time I’m ordering filament and make a closer version from that translucent PETG.

The original part is translucent yellow. I’ll probably grab a roll next time I’m ordering filament and make a closer version from that translucent PETG.

Want this 3D model for your own personal use to get your Indy Operational again?

Enjoy! - https://www.dropbox.com/sh/lhoboi7ekkyvibf/AABO0BAPum7rI5t55TDHgQsxa

No Good Gofers Reconstruction

Typical “don’t sue me” stuff applies, here.

A friend of mine sent me his broken gofers and some non-painted reproductions. I used the facial details from the broken original with the structural benefits of the reproduction to create a couple models for 3d printing replacements. You can grab the models for your personal use and printing, here:

https://www.dropbox.com/sh/06tmsbnqvcm2ncz/AAD-tWBVPFfBnVCCPDQoOioJa?dl=0

I’m not interested in doing this for cash but if you are desperate, need a set - I’m happy to help you out as a favor, just email me.
I also found this thread on Pinside, recommend you reach out - their results look many times better than my scans :)

PLA Print w/ PLA Supports - these turned out pretty good

PLA Print w/ PLA Supports - these turned out pretty good

PETG Print w/ PETG supports.   The PETG support boogers are too difficult to remove to be practical.

PETG Print w/ PETG supports. The PETG support boogers are too difficult to remove to be practical.

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PETG Prints w/ PVA SUpports

PETG Prints w/ PVA SUpports

The results are good pre-painted, extremely tough.  The print layer lines are obvious, in this batch.

The results are good pre-painted, extremely tough. The print layer lines are obvious, in this batch.