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Post by markspoelstra on Mar 11, 2023 8:11:53 GMT -7
Wow, this is all great information. One more question for the 0.05 fibers: do I need special tools to "cut them"?
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Post by scotttucker on Mar 12, 2023 1:25:22 GMT -7
I am not sure whether you are supposed to - when I was experimenting I just cut them with a knife or even snapped them to the right length. Seemed ok (obviously taking care to clean up fragments etc).
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Post by scotttucker on Apr 2, 2023 13:54:43 GMT -7
Sorry for slow progress - have to do some house repairs which is swallowing up time (although the upside is that I sometimes just let episodes and episodes of the pod cast just roll on). Just a screen shot to show a little progress on the Spitz. The odd patterns on the dodec are a modelling artefact which do not show up on the printed output.
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Post by markspoelstra on Apr 2, 2023 13:57:43 GMT -7
Very cool!
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Post by scotttucker on May 29, 2023 22:39:58 GMT -7
Another slow posting period - quite a lot going on at the moment. I have been working on the spitz model - the dodec is not attached properly yet (hence the light gap visible in one of the photos) The paper insert in the equator projector is not obviously not right but can be interchanged later.
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Post by scotttucker on May 29, 2023 22:42:10 GMT -7
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Post by Ron Walker on May 30, 2023 10:39:24 GMT -7
Again, beautiful work.
A thought on working with thin fibers. Try and find the plastic ones and not the glass ones. The glass crack easily and can cut flesh like a paper cut...nasty.
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Post by illusionmanager on Jul 28, 2023 13:33:39 GMT -7
The starball has been available since about 2018 on Thingiverse as an .STL file. It contained 8911 stars. View Attachmentheb je ook een link, want ik kan hem niet vinden op thinkyverse.
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Post by Ron Walker on Jul 29, 2023 10:37:15 GMT -7
I don't understand Dutch but is this what your saying?
do you also have a link because i can't find it on thingiverse
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Post by scotttucker on Aug 5, 2023 23:38:54 GMT -7
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Post by starsheep on Feb 16, 2024 13:02:36 GMT -7
Another slow posting period - quite a lot going on at the moment. I have been working on the spitz model - the dodec is not attached properly yet (hence the light gap visible in one of the photos) The paper insert in the equator projector is not obviously not right but can be interchanged later. View AttachmentAh this was another image what also inspired me.
The laser cutter would be good for cutting a dodechodendron. (and I can experiment with other points of view.)
I have also been considering how I could make some planetary projectors, for the Spitz Jr I Just got, using the laser cutter and acrylic.
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Post by Ron Walker on Feb 16, 2024 15:38:04 GMT -7
I would think that a lot of the very small holes would close over as the molten plastic flowed.
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Post by starsheep on Feb 16, 2024 19:40:35 GMT -7
The plastic does not flow. It vaporizes!
There is also a fiber laser. I thought this might be useful for making some watch dial printing plates. I had the focus wrong and it etched inside the acrylic. One sees this a lot in souvenir shops where images are etched inside glass or other transparent stuff.
My biggest problem with all this stuff Is I have to program it. I have scripts what can convert postscript to DXF. I have an older CAD program which only runs on PowerPC macs. Have a collection of those too. Nowdays the CAD companies want to rent it. They claim one can use their products to make massive amounts of money.
My mentor in the 1990s had a tool and die stamping outfit. Bought a clock factory for his retirement. Minimum run of the stamping machines was like 10K unit. Most orders were like 100K unit.
I always like how the Morrison plates were made. During WWII the Acadamy of Sciences basement was used for making Binoculars and Nordon bomb sites. Most of the glass production in the Silicon Valley is secret. The Acadamy curators in the 1990s felt this history tainted the pure anthropological mission of the museum. They also own one of the the better collections of watches and clocks. Which are on permanent loan to the National Museum in Pennsylvania. As an Anthropology museum such artifacts of human industry are not part of their current mission. At least the stuff can not be sold to private collectors, such as what happened to the Chicago 'Time museum.' collection.
Anyway they could do thin film vacuum coatings. So Grains of sand were placed on the glass. Then the coating flashed onto it. My mentor also worked for Cliff Gardner, Philo T. Pharnsworth's brother in law at Varian. One of the reasons for locating such high tech in the most fertile food producing valley of the world had to do with canning jars. Which were made from glass. This glass is what was used in the early vaccum tubes. Then of course for the pure silicon that the valley is known for. Some of what comes from 60 miles away. Not sure if the sand mines are still in operation. I think the pandemic changed a lot of the older stuff. I live on franscican formation sandstone. There are fine pure white layers in it.
If you ever do want a fusion plasma star. The Pharnsworth Fusor will generate one. Sadly it pretty much bankrupted ITT (remember them?)
I spent years back in the 1990s taking jewelry and enameling classes. Part of this was should I ever want to make some really really accurate star chart plates ...
One of the founders of the makerspace worked in an optics lab. We have lens grinding machine and some sort of hydrogen furnace. None of what is set up.
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Post by scotttucker on Feb 17, 2024 0:39:39 GMT -7
I will put the Spitz on Thingiverse next week. I just tried to upload the ZKP1 but you have to wait 24hrs if it is the first time you upload anything there.
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Post by starsheep on Feb 21, 2024 18:17:43 GMT -7
Looking forward to seeing the Spitz download.
I did download the ZKP1.
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