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Hey Folks, 

This video is the first episode in a companion series to the main Antikythera Mechanism project, that I'm calling "Antikythera Fragments". Sort of like the ongoing Spare Parts series, but specifically for the AM.

The reason for the separate series is that there's a lot that I'd like to discuss about this machine, that requires a large amount of speculation and guesswork. I'd like the main series to be as fact based as I can get it, so where I know I'm clearly deviating into speculation territory, I'm going to hive the topic off into one of these "Fragment" videos.

It doesn't mean that I think the speculated idea is necessarily wrong, just that its more open for discussion. I'll share my thinking with you, and hopefully you'll have your own thoughts and share them too.

The first subject I want to cover is the topic of workholding that I briefly touched on in the 2nd episode.

Enjoy!

Chris.


-------------- Video Notes: --------------- 

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Files

Antikythera Fragment #1 - Ancient Tool Technology - Making A Small Parts Vise

Antikythera Fragment #1 - Ancient Tool Technology - Making A Small Parts Vise, by Clickspring. A possible answer to the question "How did the Ancient Greeks hold small metal parts for filing?" If you would like to help support the creation of these videos, then head on over to the Clickspring Patreon page: https://www.patreon.com/clickspring ________________________________________________________ A very special thank you to Patrons: Sinking Valley Woodworks (http://www.sinkingvalleywoodworks.com) Mike Manfrin Mitchell Collins Dan Keen Samuel Irons Sean Kuyper Matteo Neville Daniel Cohen Larry Pardi Olof Haggren Stassinopoulos Thomas Florian Ragwitz Matthew Middleton ________________________________________________________ You can also help me make these videos by purchasing via the following Amazon Affiliate links: Cameras used in this video: Panasonic GH5 - https://amzn.to/2rEzhh2 Panasonic X920 - https://amzn.to/2wzxxdT Tools & Shop Products: "Solidworks 2013 Bible": http://amzn.to/2FObS1D "Foundrywork for the Amateur (Workshop Practice)" - https://amzn.to/2Kd1iUb "The Backyard Foundry (Workshop Practice Series)" - https://amzn.to/2KdfTip "Casting Practice – The Ten Rules of Castings" – http://amzn.to/2HF3VfL Hegner Scroll Saw: https://amzn.to/2IhteVW Super Pike Saw Blades Size 4/0 pkg of 144: http://amzn.to/2IO6aPw Salamander A-6 SUPER Clay Graphite Morgan Melting Crucible: http://amzn.to/2pkVAak Abbreviated Transcript: 00:25 And I'd like to talk a bit more about that in this video as I make a version of the device that I described. It's basically what we would today call a "stitching pony". or as I intend to use it, pushed firmly against the bench. A shallow wedge acts as a spacer for the 2 jaws, and a basic bronze casting can be slid up and down the taper to apply or remove the clamping pressure. 00:54. Much like the modern equivalent, an ancient version might have had the jaws covered in leather to both protect the work, and also improve the grip on the workpiece. Now of course, I'm using modern tools to make it. But its easy to imagine how this could have been constructed with the known tools of the day. The materials are common enough, and for the most part 01:13 I'm using interference fits and a wedge to hold everything together. So there's no modern fastener tech required. I must admit though, its very pleasant to be able to use modern power using a similar principle to the modern machine screw. So its not a huge leap to imagine a simple wooden screw vise existing in the same period. 02:01 But as tempting as it is to imagine the Ancient Greeks using tech closer to our own to solve the same problems, I think its worthwhile establishing that this need not necessarily have been the case. The Antikythera Mechanism is an elegant and strikingly efficient design, and much the same could be said of the broader Classical Greek culture. 02:22 I think that its reasonable to assume that the Ancient Greeks Secondly, each tool was a solution to a specific problem. So I'd expect the tools to be practical and functional, with no unnecessary embellishments. 03:07 So the tool would need to be easy to repair when it inevitable breaks or wears out. So I would expect no unnecessarily complex tech, and as few moving parts as possible. As I speculate on the tool technology going forward, And the tin is also scrap, left over from making the tin lapping discs in a previous video. 04:48 The casting looks to be OK, and now needs the sprue and riser cut off, and be given a general clean up. I used a file to knock off the sharp edges, and I've left the other surfaces with a bit of a rough "as cast" look to give the tool a bit more of an authentic presence. OK, so next up is the main body of the tool, and then hammered home. 07:14 Now there were quite a few traditional adhesives available for use in the ancient world. Although I imagine that a good choice to hold the leather in place would have been something simple like pine pitch, a thick tarry substance. I don't have a lot of pine trees in my part of the world, I cut it to a convenient operating length and then pinned the base with a single dowel. 08:27 But I figure if it was, then a natural linseed oil would probably be one of the options available. OK, so that's the tool compete, and I have to say that it has a nice convenient feel. is to use it to make something genuine, like a wheel from the mechanism. Initially I had expected to have to permanently fix the vise to the bench somehow. 09:41 Now to be clear, I'm not saying that this is definitely how the Ancient Greeks approached the problem of workholding. These are just my personal thoughts based on what's required for this specific machine. But I do think that this sort of approach is worth pursuing. And I think it will shake out some really interesting ideas and conversations as I build more of the tools. Antikythera Fragment #1 - Ancient Tool Technology - Making A Small Parts Vise, by Clickspring.

Comments

veritanuda

Gotta hand it to you Chris, I think you nailed it with this idea and it takes you well out of the realms of just engineering and machine work into proper artisan work. It really is a thing of elegance and function. And there is a lot to be said for working at shoulder height rather than being hunched over a vice screwed to a bench. Terrific job. Well done!

David

Dammit, I am at work and can't watch this for several hours. I expect it'll be brilliant and worth the wait, everything else is. Just be more considerate of my schedule in future!!

Anonymous

I was just rewatching the other Antikythera videos when the notification for this video came in. ;)

Anonymous

Elegantly simple, I like it. I could easily see something of that style used back then. Also something like a stitching pony as well.

Anonymous

hi chris i really admire your work, and how you approach the task, i hope i would have the time some day and follow in your footsteps, i am sure i will learn something new

Mark Wilkes

Great work as usual! That'd be a fantastic tool for any small metal work - the right balance of firmness, flexibility and gentleness on the part. It'll be interesting to see how often you use it. I think I'd prefer to use that than a watchmakers vise for a lot of things. Your production values just blow me away, man...

Anonymous

Wow, I had no idea you were going to be casting some of the parts as well! The whole series has just got that much more exciting as a result. It's intriguing to hear your thoughts on the potential devices and tools used for this build. Thanks so much for sharing! :-)

clickspring

I'll try to use it as much as possible to really test it out - I've got lots of filing ahead of me :)

clickspring

Terrific to hear that Matt - I spent today re-making my furnace. I've been using a sort of temporary thing to get a better idea of what I want long term and started on that build today - no vid on the build (I want to get back to the AM vids ASAP) but I will do a bit of a show and tell on it for patrons in the near future :)

Anonymous

I love it. So elegant. I wasnt expecting hand filed gears though! Your dedication to your work is so far beyond anything I've ever seen before. Please don't ever stop making videos!

clickspring

Cheers Matt! I might not file them all tho!! Not sure my poor hands could take it!!

Anonymous

Fantastic as always! One question: how did you space out the teeth in the gear wheel you made at the end? It looked like you were eyeballing it?

Robert Sindorf

Great stuff as always. Did you buy the casting sand commercially or was it something you mixed up yourself?

Anonymous

My guess is the original craftsman would estimate the division of the circumference by the number of teeth, or a factor of the final number, set this length with a compass divider and "walk" the dividers around the perimeter of the wheel, adjusting the dividers until the right number of steps divided the wheel evenly, then, if necessary, divide these sections again. This would be very tedious for some of the large prime number wheels in the mechanism, but it's a simple way to make even divisions starting from a visual estimate. I use this trial and error technique at work every day and you can get very precise divisions using only a few check-adjust-repeat cycles.

Anonymous

Interesting video Chris! One question, how did you put in the pattern draft? Does the scroll saw cable tilt to enable an angled cut?

clickspring

Hey Leo, the scroll saw table can be tilted to give the required angle. A closer shot of the set angle here: <a href="https://youtu.be/qrhyTU95ydE?t=1m3s" rel="nofollow noopener" target="_blank">https://youtu.be/qrhyTU95ydE?t=1m3s</a>

Anonymous

I thought, from the thumbnail, that the vice was tiny! Amazing work as always. Would yo mind talking more about your low profile cam holders? I'm about to make some but can't source the cap screws. Cheers.

Anonymous

Yes, exactly those.

Anonymous

You're a gentleman :)

Anonymous

Hi Chris,

Anonymous

Awesome video I was gobsmacked when you started hand filing that wheel amazing work.

Anonymous

I'm curious, how are you going to do the 365 tiny holes that adjust the egyptian calendar ring every 4 years?

Anonymous

Let me second other comments. Love to see you doing foundry work too. Do you know what type of sand you got from the local Foundry? We're you shooting for a particular alloy? So many associated questions and curiosities I'd love to see you pursue. I won't overwhelm you with them all. I am impressed with the stories you tell, the quality of the delivery, and the beauty of the finished projects. Cheers mate.

clickspring

Thanks mate :) - Re the sand, its their proprietary green sand - they do very large castings for industry, brass, ally etc Yes I was shooting for a 5% tin bronze. Weighed everything accordingly, with a small allowance for copper oxidation during the melt. Will get it tested at some point to see how close I'm getting :)

Scott Clausen

You've done it again with another great video. Really enjoying it but especially the casting work. I noticed that the wedge you placed was not equal to the width of the holder's legs. Is this potentially a failure point? Just wondering if a whole width width would be better. Thanks again, Chris.

Scott Clausen

Chris, I meant to say whole width wedge in my previous comment. Sorry.

clickspring

Cheers Scott :) The oak "arms" will definitely be ok, and I think the wedge should be ok too. Its a piece of local hardwood, so its pretty hard stuff. It hasn't deformed at all after being driven in, and it looks to be sitting quite soundly in position.

Anonymous

This is so tremendously pleasing to watch. It doesn't get any better.

Anonymous

That was awesome! Nice casting work Chris!

Wes Baker

Chris, hide glue would have been available then. It, too, has to be heated, but the open time is much greater than shellac. I use it (hide glue) all of the time. It's a wonderful adhesive. Your work is lovely. Your machining and attention to detail, exquisite.

Paul Busby

Are we not supposed to notice or talk about how you suddenly mastered foundry work and sand casting :) April Wilkerson just released a vid on sand casting and it looks hard. Your video (like all of them) makes it look a breeze. Great vid, Do you see yourself using that tool for other things now.

Peter W. Meek

I would consider wrapping the closing ring (at least the bearing surfaces) with leather as well. Otherwise you are going to end up with a lot of wer on the outside of those oak arms. Leather might also improve the grip to keep the ring in place.

Dean Thompson

Your thoughtful attention to detail is inspirational. Both in your craftsmanship and the intellectual exploration of the tools and methods of the time.

clickspring

Thank you Wes, interesting to hear about the hide glue! I was tempted to have a go at making some, but the process looked like it took a fair amount of time. Do you make you own?

clickspring

Ha! Still plenty of room for improvement!! - yes will definitely continue using the tool, its a pleasure to work with.

clickspring

Yes definitely worth considering Peter, thanks for suggesting I will investigate it and see what gives :)

Wes Baker

Chris, I buy it (hide glue) in granular form and heat in a dedicated (and made for hide glue) pot. (<a href="https://www.amazon.com/Hold-Heet-Electric-Glue-Quart/dp/B008KHGM1G/ref=sr_1_3?ie=UTF8&amp;qid=1488836103&amp;sr=8-3&amp;keywords=hide+glue+pot)" rel="nofollow noopener" target="_blank">https://www.amazon.com/Hold-Heet-Electric-Glue-Quart/dp/B008KHGM1G/ref=sr_1_3?ie=UTF8&amp;qid=1488836103&amp;sr=8-3&amp;keywords=hide+glue+pot)</a> I did a quick search on ebay.au but could only find glue pots from the US. Obviously electricity is anachronistic....! All you need is a double boiler. Add water to the granules. Heat to a honey-like consistency (more or less viscous for different applications) and apply with a stiff, hog bristle brush. <a href="http://www.ebay.com.au/sch/i.html?_from=R40&amp;_trksid=p2050601.m570.l1313.TR1.TRC0.A0.H0.Xhide+glue+pot.TRS0&amp;_nkw=hide+glue+pot&amp;_sacat=0" rel="nofollow noopener" target="_blank">http://www.ebay.com.au/sch/i.html?_from=R40&amp;_trksid=p2050601.m570.l1313.TR1.TRC0.A0.H0.Xhide+glue+pot.TRS0&amp;_nkw=hide+glue+pot&amp;_sacat=0</a>

Dean Thompson

A much more readily available and much less expensive choice is an electric baby bottle warmer.

Anonymous

Oak is definitely my favorite wood to work with. And plenty abundant here in the US Midwest. In other news, It never ceases to amaze me thing things you can do with a simple file. The kind of precision and patience I certainly don't have haha.

Anonymous

Is it just me or is the video really deleted? When I open it it says: video deleted by user..

clickspring

Yes its my favorite wood too, so pleasant to work with, light, strong, easy to sand. Cheers Braden :)

Anonymous

Really cool to see these more primitive tools being made. Can't wait to see the others you make in this project!

Phil Sydor

Wow - this looks to be easier to use than a bench mounted vice. Excellent and practical design.

Anonymous

Nice work! I didn't think it would that practical when I started the video, but I'm pleased to see I was wrong. Looks amazingly practical compared to how relatively easy it seemed to make. While watching I felt it reminded me of something else. Then it clicked for me; The "Primitive Technology" videos. I would definitively recommend you watch some of it if you have the time. You'll absolutely fall in love with the ingenuity and problemsolving.

Duncan Luddite

G'day Chris, Watching this again (and the previous episode where you were using a fly cutter and electronic dividing 'plate' on your lathe), and it was fun hearing you talking about using modern power tools and enjoying getting the work done faster :) Four episodes later and you were hand making your own files, with home created carbon steel, and consolidating your trip down the experimental archaeology rabbit hole big time XD Lovin' it. Cheers

clickspring

Yes it kinda went off-road and into the bushes from there onwards! Cheers mate :)