Select the outline, turn it to black and then set the width of the lines to 0.01pt. I think this lattice work is the coolest part of this project, but you can use the “Modern Rete” option from his software and put it on a transparent disk if you wish. Print page 4 on acetate transparency, tracing paper, or some other transparent or translucent material. On the back of the astrolabe is a rotating bar called the alidade or label, which is used to measure the altitude above the horizon of celestial bodies. Set the document size to 11x17 inches. Press print to send the file to the laser etcher. 2 years ago, The software that produces the lines just gives you EPS files. 215. Make sure the file has arrived in the laser etcher. Group this when you are done, and copy it into your buffer. 0. In order to give it more weight I laser-cut the same shape on 3 millimeter wood – minus the engraving – and glued the metalex cut-out on it. To use a planisphere, you need to just align your current date in the outer ring to the current time on the inner ring. The center of the oval window (not the rivet at the center of the planisphere) is the zenith - the point directly above your head. You then use the alidade to site the star and read the angle off of the scale on the back. These instructions barely cover the basic function of the astrolabe. VATApprox: 16.12 / US$15.75, Price: £32.29 incl. From the bitmap, you can silhouette the image and then modify it so it is a bit stronger in a few select places for when you cut the acrylic. Je vais utiliser la méthode de Thimarie (et autres) pour le doublage en cuivre de la coque. Then read along the line of the label to see the position in the Zodiac. The constellations you see in the sky will be mirror images of the constellations shown on the rete. Move this object to the back of the drawing using Object->Arrange->Send to Back. This astrolabe kit was designed and produced by Dominic Ford and Katie Birkwood, based on S. Eisner, 'Building Chaucer's astrolabe', Journal of the British Astronomical Association 86 (1975-1976), pp. This same set of steps here can be use to etch around any Adobe Illustrator file. Islamic and Western astrolabes are filled with beautiful engravings in brass. That is truly beautiful! Construction of an astrolabe. The hole in the top of the crown is designed to hold a string, cord, or rope for this purpose. I had the chance to demo the functions of the astrolabe and discuss history and its uses in period. If you like, you can use any laser etchable and cuttable material for this project. We can see that the Sun is 22 degrees into the constellation of Capricorn. I just corrected this. découper les deux figures et les coller sur les deux faces d'un disque en carton de mm d'épaisseur et de même la construction d'un astrolabe. From the top menu, select from “Image Trace” the “Silhouette the image” option. By using the rule, you can figure out what the time is if you know the current date. You may wish to run a piece of scrap material in the laser etcher with a small test pattern to make sure the laser is warmed up. From this modified bitmap, you can trace an outline of the rete. You should be able to rotate each of the label, rule and rete independently from each other. Construct a beautiful astrolabe out of acrylic (or another similar material) using a laser cutter. The acrylic sheets for the project can be found in any big box building supply store which sells glass for replacement windows. At this point, you may wish to attach a lanyard through the top hole the crown of the astrolabe. Picture: A 15th-century French Astrolabe. “I started generating the EPS files with your software for my southern latitude, and then added some more stars to the rete and a clever-but-mostly-useless device to the sun eccentric in the back, for the leap years. Did you make this project? Very interesting information on the topic, from around the year 1734: https://en.wikipedia.org/wiki/Jantar_Mantar,_Jaipur. Tip In this astrolabe worksheet, students use a compass rose and an astrolabe to measure altitude and azimuth of five objects in the room and 5 objects outside the room. -- attributed to Alfonso the Wise, King of Castile, after studying the Ptolemaic system, on Euclidea – Geometric Construction puzzles, Euclidea – Geometric Construction puzzles, http://www.astrolabeproject.com/17/05/2019/nova-labs/, http://www.astrolabeproject.com/24/05/2019/thingiverse/, https://www.thingiverse.com/thing:3649670, https://www.thingiverse.com/thing:3650060. You can see a scale printed on the grid with the numbers 40 and 60. Using the colored acrylic would give the astrolabe a more classic look. The rule (on the left) should be placed over the top of the rete, on the front side of the astrolabe. I worked in wood, craft plywood in particular, as it was readily available. Please do not take umbrage at my wit (or lack thereof) besides the information on Punjabi Jantar Mantar in Jaipur, Yours were the only comments I could understand, I too am technologically challenged. Lesson Planet. In researching the astrolabe and related tools, geometric construction comes up regularly. Donc voici où j'en suis. With me getting to the point of making instruments out of more than paper, I’ve started to post the working files and instructions on the Thingiverse site. There should be a small space between the template and the Front. Forum pour tous les passionnés de modélisme naval, LE BON DIAMETTRE POUR LE PASSAGE DE LA GODILLE ( ENGOUJURE ), DANS LE TABLEAU ARRIERE C'EST LE DIAMETTRE D'UNE BOUTEILLE DE VIN. Open the “front_back_template.ai” file in Adobe Illustrator. However, double clicking the program icon will also work once you let the computer security settings know that this code is allowed to run on your computer. Make sure to turn on the air filtration system. And to avoid wear to the thin metallic layer I backed all moving parts with a special paper I found, which has a soft velvety lining on one of its faces. I thought it was a bit outside the scope of this Instructable, but the resulting backlight astrolabe would look awesome! Cambridge Ford: Building a model astrolabe J. Br Astr. You need to select the DIRECTORY where you want to put the file. Load a piece of the Avery plastic divider into the laser printer. You only need one rule and one alidade for this project, but I put in a couple extra because there was plenty of room on the 11x14 piece of acrylic. The spikes on the rete indicate the positions of individual stars. VATApprox: 16.01 / US$15.65, Price: £27.94 incl. VATApprox: 23.18 / US$22.65, Price: £26.95 incl. The rivet that is at the center of the planisphere represents the point directly above the north pole of Earth.