Man…I have a lot to learn….I didn’t even know what a pin router was until today! Great video 👍😊

This guy must float pretty well with all foam has been breathing in for last 30 years LOL~

That vertical axis needs a DRO. Amazing job. Can't wait to try it...

Awesome! I didn't even know that type of router existed.

I think this is a lot more accessible than people would think. Especially with these cheap CNC lathes for wood that are out there, I mean they are basically useless even at what they are supposed to do, which is milling wood, but styrofoam shouldn't be a challenge and with that it's just a quick press of a button from CAD file to lost foam form.

Excellent video! Thank you!

As I watched your method I tried to figure out how to invert it for my table mounted router, pin would be mounted above. It's possible of course but you lose the sight advantage with the part under the pattern. Then I had a EUREKA moment. This is FOAM that is being machined and cheap trim routers can be used, then this idea got cheaper when I remembered that a lot of CNC machines use glorified toy motors for the router. So even if I have to go the expensive route of a trim router, which I have, I can set up a single purpose station very easily and cheaply. To go whole hog anyone can reproduce at least a mechanical version of your multi station system by using lost foam castings for your iron castings. "Toy" motors with adapters for the bits and you can have as many bit stations as you want. Even if real trim routers were used it can still be inexpensive. Have them on a horizontal turret and then only one lift device is needed and much less space. I have to go to work soon but this will give me something to think about. My point in this babbling is, as its foam that is being machined then everything mechanical associated with it can be much weaker. I wouldn't doubt that a lot of it could be built out of wood...if your only going to be using it for foam.

@kellycoffield533

3 жыл бұрын

You can build an L-shaped arm in box section or laminated thickness out of wood, but if you are going to spend money, spend it on an actuated z (vertical) axis with at least 2" of plunge, 4" better. There are oodles of linear actuator packages on eBay and Amazon. Mine is just a DC gear motor with an acme screw, anti-backlash nut, and limit switches. Could be a stepper motor if you prefer. Yes, it doesn't take much of a router. You might also choose to spend money on good bits. My go to is 1/4" diameter by 4" long, double flute spiral carbide. I'd never use a bit like that on any hard material, but for foam, no problem. Plunge the cutter into you table surface and you have a hole for a 1/4" pin under center. Buy some plastic washers with 1/4" ID and whatever OD you want to cut over pattern size......voila'...pin router. Best, Kelly

Amazing, thank you Kelly for sharing and enlighten us.

BRILLIANT. Thanks for teaching me many, many of the "lost arts". Bravo for making these videos that will last forever!

@kellycoffield533

2 жыл бұрын

I made that router, at least all the castings including the iron table, 25+yrs ago. There are modern day equivelants available. Onsrud is a well known manufacturer of industrial models and there are Taiwneses and Chinese manufaturers available from the typical importers. Search "over arm router" or "pin router". There are inexpensive hobbyist alternatives for "inverted pin router" that are just an arm mounted to your router table that mounts the guide pin over the center of your table router bit. Those are also very easy to make. Best, Kelly

This is great and fun to watch and learn. Thank you kelly for sharing your knowledge and experience.

Mr Kelly..nice job.congrtulation!

Fascinating and concise presentation super interesting great work.

good job, could make a video showing the wooden jigs/templates and how you build them

I'm curious if it would be possible, to do something kinda crazy,. Build a new Holley carburator, based off the secondaries of a spread bore Holley, making the primary side just as large. Use the traditional metering blocks, and bowls, and use down leg, annular boosters, the difficult part would be drilling the idle circuitry. Maybe edm can be used , make it fit the traditional dominator manifold, and have a nice radius entry, with fairly large venturi, with the booster down low, use a enrichment circuit in the idle circuit, in place of a choke, like a modern scooter carburators use, maybe actuate it differently, Id like to cast a intake manifold to use such a carb, heck I'd like to build a engine that really needs such a carb, it should flow appropriately 1200 cfm maybe more, depending on the booster restriction. It could easily reach 1400 CFM, a 850 carb the primary is only 100-150cfm of the total,. That leaves 600cfm+ for the secondaries, I know there is alot I'm not figuring,. But adding things like adjustable jets, that the changeable jets only set the max fuel possible, then a needle valve can adjust the fuel down about 10-20 jets , so possibly 80's-90's could then be adjusted out, possibly using a wide band O2 sensor, possibly using two power valve circuits, one for off idle enrichment to allow the use of a pair of 30cc pumps for acceleration, maybe a 50cc pump in the secondaries I'm looking for flow of a 1150 dominator, with street manners of a 1850/4150 650cfm, The extra power valve , can possibly. Be mounted in the secondaries, yet be feeding the primary boosters, with a means of using this circuit for cold starts, in place of a choke, use a needle valve to restrict cold enrichment, and the spacing between primary and secondaries can be adjusted to fit the runners of a intake better, or even make it a 2bbl, using a pair in line, to feed a V8 engine, a 650 - 700cfm 2bbl could be useful, sorry to ramble again, I'm bad when I gave had no sleep, insomnia !! ✌️ Great video, thank you for sharing so much of your skills and knowledge!!

very nice and complique

VERY VERY GOOD PROCESS. A MORE SELF-LEVEL ROBIST. NOT. AND YES A PROFESSIONAL OF THE HIGHEST QUALITY.

Some people may chuckle at the idea, but I love me a well tuned Quadrabog. That's exactly what your base and fuel bowls remind me of. I would absolutely love a dual 1050cfm mid rise tunnel ram 🐏 setup on a high revving 632 BBC with 500cfm heads.

thanks you for you Your excellent and rare work on KZread Spherical shapes 3d how to do it

Hi Kelly where do we buy that Router? Awesome video Hello from Australia,,,

👍👍👍👍👍👍👍👍👍👍👍👍👍👍 de FRANCE

Same problem, hearing Your voice as in all the other videos from You I've watched. When are You going to do something about it?

Do you ever use a hot knife to cut your forms??? The router work looks for clean... Good session...

@kellycoffield533

2 жыл бұрын

Yes, I use a hot wire mostly just to resize and cut stock to rough dimensions, what with some patience, it can be used with templates for guide pattern cutting. Best, Kelly

@MRGF78

2 жыл бұрын

Thanks... amazing job... I was wondering how I could make some patterns happen, but watching you work kinda cleared up a lot of questions... Good session...

NICE

Very cool! What is the pink foam material? And where do you get it?

Hello teacher, I congratulate you on all that knowledge you have, I want to ask you if you can tell me what the name of the foam you use and if you prepare it yourself or where you can get it. Thank you very much for your answer.

@kellycoffield533

3 жыл бұрын

It is extruded polystyrene insulation board XPS. The white expanded polystyrene (EPS) will work to but does not typically machine as well. In the USA it can be purchased at home improvement stores. I use the Pink Owens Corning brand called Foamular 150. The Dow product is Blue. The color is not important but the density is. The Foamular 150 is about 1.3lb/ft3. You should select foam that is between 1-1.5lbs/ft3 if possible. Check your home improvement stores for polystyrene insulation board. You may want to view this thread. forums.thehomefoundry.org/index.php?threads/confessions-of-a-lost-foam-caster-5-years-on.1650/ Best, Kelly

15:30 Maybe need a Pokayoke !! but a great analog Process !!!

Do you find the climb cutting the foam makes a smoother surface than the conventional cutting you did on the roughing pass? Or does it make much difference? I know when machining metals it matters a lot on the surface finish. You always have to coolest machines you've created.

@kellycoffield533

4 жыл бұрын

The biggest improvement in finish is cutting on one side of the bit for chip ejection. On the clean up pass the climb cut may have a slightly better result but to be honest, at proper feed and speed it's hard to tell the difference on a light cut. For roughing, sometimes a conventional 2-flute straight bit is better because the wide gullet clears chips very well.

@tombeasley1943

4 жыл бұрын

@@kellycoffield533 Thanks Kelly

You have mentioned in other videos that you have a cnc router. Im curious why you choose to create these foam patterns with this method instead of with the cnc router?

@kellycoffield533

2 жыл бұрын

You're just viewing them out of chronological order. However, I do attempt to show different methods of pattern construction to show those that do not have CAD?CAM skills the art of the possible. Best, Kelly

really interesting process. I am looking to exspand my shop and would like to do more custom and fun stuff(still make money doing it though). curious about how the pattern is made... ill check vid list maybe youve made one?

@kellycoffield533

Жыл бұрын

This pattern was made on my over arm pin router as shown in the video. These days I use a CNC Router to make my patterns. I'll post a new video in a week or two. Best, Kelly

@customsolutionsinc

Жыл бұрын

@@kellycoffield533 yeah I figured, but still might be cool to see the process, I'm sure people would watch. Like how you went from and the original carb to a pattern. Just an Idea.

@kellycoffield533

Жыл бұрын

@@customsolutionsinc Maybe I'm not understanding your question. The original Carb Is an Autolite Inline Four. This is just 2Brl version of it that uses all the same internals. I took the dimensions from the original carb and made the mdf guide templates shown in the video to pin guide the router bits. Thought I went through each operation? Best, Kelly

@customsolutionsinc

Жыл бұрын

@@kellycoffield533 i was refering to the process of making the MDF pattern.... as interesting and informative as this video was I thought the process of making the mdf pattern would be equally interesting. I can tell alot of thought and planning goes into all your projects... interesting to follow... good job.

No laser CNC ?

great info thank you, the foam you are using looks construction type can they be glued together, and what kind.

@kellycoffield533

2 жыл бұрын

Yes, extruded polystyrene insulation board like that sold at retail and home improvement stores. 1.2-1.5 lbs/ft3 density. Even though it can be glued together, machining through a glue joint usually loads up the cutting bit fouling the cutting afterward. Best to glue parts together after machining if possible. Best, Kelly

@danvandertorre6349

2 жыл бұрын

@@kellycoffield533 thank you sir for your time

Greetings and Regards Mr. Coffield. I do not speak English well and I have to find most of your conversations with the dictionary. Please write me the name, foam, glue and liquid that you apply on the foam. I watched your videos for hours and it was very difficult for me to find these names. Please help me in this way. Thank you again with heartfelt respect .Mamad

@kellycoffield533

2 жыл бұрын

Use Google Translate or tell me your langugage and I wil translate. Extruded Polystyrene Foam Insulation Board 1.3lb/ft3 density. Hot melt glue or common white glue (Polyvinyl Acetate), and non-setting joint compound used on drywall board diluted with water. All can be found in home improvement stores. Best, Kelly

A mortal person needs that lathe into that but you don´t.

🥇🥇🥇🥇🥇🥇🥇🥇🏆🏆🏆🏆🏆thanks a lot

Kelly, is there any reason one could not use a CNC router for the pattern cutting instead of the Pin Router?

@kellycoffield533

3 жыл бұрын

No reason at all. In fact, I have a CNC router. I'm just not a proficient enough solid modeler yet to use it on more complex projects, but this carburetor body would be ideal since it could be done in two set ups with a single bit, but you need appreciable z-axis travel for this one. Best, Kelly

Can you tell us the type of refactory coating you use for your foam parts? Was it a spray coating you use?

@kellycoffield533

4 жыл бұрын

I use a commercial product called Poly Cap 600. It's made by Refcotec but there is a substantial minimum buy (50gal/600lbs) that makes it impractical for most hobbyists without a group buy. Thinned, non-setting, drywall joint compound (for gypsum drywall) will work just as well for aluminum. You can buy that at retail home improvement stores very inexpensively. Best, Kelly

@RadioactvPanda

4 жыл бұрын

@@kellycoffield533 Thank you!

Vacuum on parts

You need a cnc router

@kellycoffield533

2 жыл бұрын

I have one.

translate to spanish please teacher