Byzantine Sundial-Calendar - Part 2 (Cutting The Wheels & Pinions)

Hello mate, that came from a NASA/JPL discussion where they put the average eclipse season at 34 degrees (when considering all factors). The eclipse prediction feature is an additional capacity not present in the original device, hence the use of the modern figure - Cheers :)

Clickspring

Hi Chris, I know I'm well behind the curve on this, but I've been working through Ptolemy's Almagest and just got to the section where he calculates the width of the eclipse windows that you have on your solar dial here. However, he comes up with a slightly smaller value of ~30.40º. But from this video, it looks like you used a value of 34º. I'm curious where that number came from.

Jon Voisey

Gday Chris, really enjoyed this one very interesting, love those little arbours, may have to purchase said book :) TFS. G

Graeme Brumfitt

Hey Jon, I purchased that spindle from Malcolm Wild: <a href="http://www.j-m-w.co.uk/tools10.html" rel="nofollow noopener" target="_blank">http://www.j-m-w.co.uk/tools10.html</a> - cheers :)

Clickspring

I know I'm late to the game on this comment but the spindle you use to cut the gear teeth on the lathe, is that a purchased part or a shop made one? I have a horizontal mill that I've always wanted to attach a small spindle to the over arm support and this looks like exactly what I need.

Jon Raymond

Hey Theresa, that tool is called a divider, cheers :)

Clickspring

Can anyone please say the name of the tool at 6:40? So simple and useful!

Theresa Holl

Hey David, 3.18mm is 1/8", 4.76mm is 3/16", both nice common Imperial reamer sizes. I have specified reamed fits in some of the mating parts, to ensure a close fit for the subsequent adhesive/solder bond, which is particularly important for an adhesive like Loctite 603. More generally, the mix of Imperial and Metric units across the design is simply a function of the available drills and reamers in my part of the world - The model engineering suppliers tend to supply good quality and well priced Imperial reamers, but the drills are almost always metric. Its just a fact of life that we readily navigate and build in both. But as with all designs, you can simply use the nearest cutting tool in your index, after examining for any possible consequences. Cheers mate :)

Clickspring

Fascinating, but a design question. Why did you pick these non-integer sizes on some of the arbours. The Lunar zodiac display arbour, for example, is peculiar in both inch and metric. My thoughts were the wheel would be first drilled on 3mm/ 1/8th, put on an arbour to cut teeth, and then bored in a wheel chuck to ensure concentricity of the hole with the teeth? Arbour made to match? cheers David

David Paterson

Hi Chris,

David Paterson

Hey Terry, I'm currently working on 2 Antikythera Fragment videos at present, refer to the [status],post for more detail. The first of these 2 fragment videos should be out in a day or so, and the next should follow a few days after that. Antikythera episode #4 will follow these two, so the the next BSC episode will be sometime late next month at the earliest. I have constructed a prototype of the BSC, but not the AM. That is effectively being built episode by episode - Cheers, Chris

Clickspring

hi, Chris. I was just curious when the next of the series are coming out . Just anxious you have built both mechanisms already right ?? I hope it's ok to ask ?

Terry L Lembke

Yes Bill Smith's Super Glue Arbor idea is truly a workshop blessing - there are so many tasks in this build that would be much more challenging without them.

Clickspring

Cheers Joe!

Clickspring

Hi Chris. I am so impressed by the gear lay-out in this project both as regards relative simplicity relative to the information obtained, and also the rather precise periods. The idea of gluing, heating and "acetoning" the workpiece to a fat mandrel is very smart and makes a lot of impossible tasks possible. For a start I had problems with the piece loosening if any chatter at all, but that was solved by roughening the gluing surface with emery paper. It was especially a problem when boring large mm holes with spiral drills. Now I drill my holes a few mm short of the end lumen before gluing and finalize with a cutter in the lathe.

Lars U. Lamm

Every time you're cutting gear teeth and you go back to regular speed as those last two teeth are perfectly formed together...most satisfying moment, ever.

Joe Fisher

Terrific to have you on board Keith! I use Solidworks, although consider Fusion360 instead - same parametric modelling capabilities, but free for home users.

Clickspring

Cheers Andrew :)

Clickspring

Terrific to have you watching mate :)

Clickspring

Hi Chris! I joined Patreon recently for the sole purpose of supporting your work! What CAD program are you using for the design & plans?

Keith Arrington

Awesome as usual. I Thoroughly enjoy your videos. And this project is super interesting from a historical perspective.

Andrew Robb

Wonderful video Chris. I really like the workshop hints that you share, and its a real pleasure watching raw material come to life. Your set-up for cutting gears is fantastic. Thank you for sharing Chris. Paul.

Paul Francis Madden

Awesome to have your support Mark, thank you :)

Clickspring

Hey chris, loving your work and passion, the effort and dedication you put in to everything you do is amazing, i have never felt so compelled to support artist, i wish I could offer more. Thank you can't wait for more.

Mark Smith

Its hard to know really - I guess the only way to determine it would be if the lucky Patron who ends up owning it, should one day put it up for sale. Great to have you watching mate :)

Clickspring

Hi, I am amazed by your work! I hope my question isn't rude but how valuable will the clock be once you're finished?

CG Hannah

Ha ha! Terrific to hear that Andy :)

Clickspring

We almost... almost caught a glimpse of your face at 6:52! One day we'll see the man behind these absolute masterpieces! I've always been an avid watcher (and now, proud supporter) of these videos. And despite not having any capable skills in engineering or fabrication, and not understanding much of the jargon, I still find these missives a true delight, and a real inspiration.

Andy Copsey

Thanks Chris :)

Clickspring

So pleased to hear that Peter :)

Clickspring

Fantastic as always, Chris.

Chris Muncy

Coffee in hand, I can't think of a better way to start the morning by watching these videos. They always put a smile on my face.

Peter Kransz

Terrific to hear that Kaylee! You should be able to Google search a local supplier of brass and mild steel stock nearby - try your home town+"brass supplies". There are also metal suppliers like <a href="http://www.onlinemetals.com/" rel="nofollow noopener" target="_blank">http://www.onlinemetals.com/</a> that you can order from online. Local machine shops are a great source of cheap material too. Aluminium rod stock in particular is a great first material to practice with on the lathe and mill - its very kind on the tools, machines beautifully and is generally very cheap and readily available. Please feel free to ask as many questions as you need to :)

Clickspring

Loving this series Chris! :) Dumb question; where do you get all your brass and steel stock & rod? I'm keen to try my hand at some of this stuff, and... I don't really know where to start!

Kaylee Fisher

"... but think of all the money I can save for (insert Mrs Manup's hearts' desire here) by using the mill (and lathe!) to fix things around the house..."

Clickspring

Every time I see one of these videos, I want to get a mini milling machine. The wife, however, doesn't.

Thank you mate :)

Clickspring

Hey Chris,excellent video. There's one small reoccurring issue that I see in your videos, and that's the voiceover microphone clipping occasionally. You may need to reduce its gain while recording - if you have a VU meter onscreen, basically just avoid it going into the red should do the trick.

rjk

Hey Shawn, I made that on the fly without plans, but there's a fair amount of detail on it in TGT#2: <a href="https://www.patreon.com/posts/tools-glorious-2-8501914">https://www.patreon.com/posts/tools-glorious-2-8501914</a> Feel fee to ask any questions as required :)

Clickspring

Hi Chris, as always superb from start to finish. I am assembling materials for the build. I have the sc4 lathe and I would like to add a wheel cutting attachment. Do you have any plans for the one you assembled. I think its a brilliant solution and would love to emulate it. Thanks for sharing your brilliance!

shawn walderman

Hey Michael, I keep meaning to do a list like that, but I never seem to find a stretch of time to get it done properly - This is basically the core of the shop, with associated tooling and other bits and pieces that you would have seen throughout the videos: SC4 Lathe Sherline 4100 Lathe SX3 Mill Delta Rockwell Belt Sander Filing Machine Horizontal Band Saw Divisionmaster indexer Vertex Rotary Table, Dividing Head and 4" Vise. Assorted tooling, drill bits, cutters, collets etc Assorted shop made tools as listed here: <a href="http://www.clickspringprojects.com/shop-made-tools.html" rel="nofollow noopener" target="_blank">http://www.clickspringprojects.com/shop-made-tools.html</a> I'm sure I've missed a few things, but thats the main stuff that springs to mind!

Clickspring

Hey Damien, this one is a good place to start: <a href="https://wrsmithclocks.com/product/clockmaking-and-modelmaking-tools-and-techniques/" rel="nofollow noopener" target="_blank">https://wrsmithclocks.com/product/clockmaking-and-modelmaking-tools-and-techniques/</a>

Clickspring

Thanks Michael!

Clickspring

As always, great stuff! Quick question, have you ever posted somewhere what equipment you have in your shop?

Michael Haymore

Cheers Chris!

Clickspring

Which of the W.R. Smith books would you recommend to start with?

Damien Miller

really neat work!

Micheal Malsed

Can't wait to see this project complete. Would love to try the build myself but you sir have 10x more patients then me!!

Christopher Ingle

Ha. The wizard of Oz. It all makes sense now. ...I'll see myself out

Stu

I'm still not quite sure how you're getting away with posting porn on Youtube. I guess it's confirmed that you're an actual wizard!

Stu

Ha ha! with a fair degree of patience!

Clickspring

ok now how the heck did you pull off that last x-ray shot?

Everfalling