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#11
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"Mike Firth" writes:
I don't think Alan yet has a sense of the purpose of a glass lathe compared to metal and wood working lathes. The closest comparison in metal working is spin welding, if you have ever seen one of those, and that is not very close. I'm sure I have a lot of misconceptions, but I think I do understand the purpose of a glass lathe. What I'm less sure of are its capabilities and that is one reason I asked for books. Actually, I haven't heard of spin welding. I guess I should think of it as something like using a glass lathe, except instead of melting glass, one melts metal. I had some hand glassworking lessons. I never got the knack of keeping the two halves rotating at the same rate. One of these days I'll follow the suggestion in Strong's book, Procedures in Experimental Physics, and take two pieces of tubing joined by a tube of heavy metal cloth and see if I can learn to rotate the two tubes, one in each hand, so that the cloth doesn't get twisted up. One additional problem is that I recently developed a kind of cyst in my left hand. I don't know how much it would cost to have it removed, but the doctor charged almost $400 just to examine my hand. He said there is a 20 percent chance that it will go away by itself and only a one percent chance that it is malignant. I can't close my left hand and I can't completely straighten my index finger when the hand is open flat, but I can still do most of the things I'm used to doing, so I've been betting on it going away by itself. One motion that is a lot harder to do under the circumstances is the twisting motion that I would have to perform if I were holding a thin tube in my hand and trying to do glass blowing. I can do it, but it is easy to get my hand into positions where it is very uncomfortable. So if there are mechanical ways to compensate for this hopefully temporary disability, I'm interested in knowing about them. Maybe I can learn to do it with my feet... -- Ignorantly, Allan Adler * Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and * comments do not reflect in any way on MIT. Also, I am nowhere near Boston. |
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#12
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My Father had to learn how to turn glass without the use of his index
finger. One of the most devastating injuries you can do with glass is to run it through you hand cutting a tendon. When he did this he didn't have insurance. They stitched the cut, but he didn't have the surgery to reattach the tendon. To this day he can't flex that finger. Where there's a will there's a way. Good luck, Randy Hansen SC Glass Tech Scam Diego, Comi-fornia "Allan Adler" wrote in message ... "Mike Firth" writes: I don't think Alan yet has a sense of the purpose of a glass lathe compared to metal and wood working lathes. The closest comparison in metal working is spin welding, if you have ever seen one of those, and that is not very close. I'm sure I have a lot of misconceptions, but I think I do understand the purpose of a glass lathe. What I'm less sure of are its capabilities and that is one reason I asked for books. Actually, I haven't heard of spin welding. I guess I should think of it as something like using a glass lathe, except instead of melting glass, one melts metal. I had some hand glassworking lessons. I never got the knack of keeping the two halves rotating at the same rate. One of these days I'll follow the suggestion in Strong's book, Procedures in Experimental Physics, and take two pieces of tubing joined by a tube of heavy metal cloth and see if I can learn to rotate the two tubes, one in each hand, so that the cloth doesn't get twisted up. One additional problem is that I recently developed a kind of cyst in my left hand. I don't know how much it would cost to have it removed, but the doctor charged almost $400 just to examine my hand. He said there is a 20 percent chance that it will go away by itself and only a one percent chance that it is malignant. I can't close my left hand and I can't completely straighten my index finger when the hand is open flat, but I can still do most of the things I'm used to doing, so I've been betting on it going away by itself. One motion that is a lot harder to do under the circumstances is the twisting motion that I would have to perform if I were holding a thin tube in my hand and trying to do glass blowing. I can do it, but it is easy to get my hand into positions where it is very uncomfortable. So if there are mechanical ways to compensate for this hopefully temporary disability, I'm interested in knowing about them. Maybe I can learn to do it with my feet... -- Ignorantly, Allan Adler * Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and * comments do not reflect in any way on MIT. Also, I am nowhere near Boston. |
#13
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A glass lathe is a fancy welding jig.
That's an excellent analogy Mike! Randy Hansen SC Glass Tech Scam Diego, Com-fornia |
#14
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In this thread, a glass lathe has been perceptively described as a fancy jig for glass working. Are there any other standard kinds of jigs for glass work? -- Ignorantly, Allan Adler * Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and * comments do not reflect in any way on MIT. Also, I am nowhere near Boston. |
#15
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"Allan Adler" wrote in message ... In this thread, a glass lathe has been perceptively described as a fancy jig for glass working. Are there any other standard kinds of jigs for glass work? -- Ignorantly, Allan Adler * Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and * comments do not reflect in any way on MIT. Also, I am nowhere near Boston. I'm curious. Do you actually DO anything with glass? Or do you just ask highly technical questions for no apparent purpose? |
#16
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writes:
I'm curious. Do you actually DO anything with glass? Or do you just ask highly technical questions for no apparent purpose? I've taken some glass working lessons in the past and it is something I would like to do again. I like to plan things like that very carefully for safety reasons and for reasons of limited space and money. I believe that the most important part of any experiment or any construction project is the thought that goes into it. Also, as I mentioned earlier in this thread, I have a cyst in my hand and that limits what I can do with my hands. As Randy pointed out, one can in principle still do glass work with damaged hands, but I think it would also be advantageous to know what kinds of jigs and fixtures one can use. I read a book on the design of jigs and fixtures for metal work and have no reason offhand not to expect that there are similar devices for glass work, especially since a glass lathe has been described as a fancy jig. I've been particularly interested in literature on glassworking and I would much rather read it than bother people on this group for technical information. I've read Strong's book, Procedures in Experimental Physics and that constitutes most of my reading about glass work. It is reasonable to ask why I happen to have started asking a lot of questions at this time. I'm not actually building something but I am trying to understand in detail how a particular thing is built, namely the Balmer series spectrum tube described the shop drawings for the Apparatus Drawing Project by Marcley. I think that even with my low levels of glassworking skills, I can probably make most of it, since in the past I managed to make a sealed, evacuated tube with naphthalene in it. What I don't have any experience or guidance with is making metal to glass seals and attaching electrodes to such a tube. I also have no experience with annealing. At the moment, the only place I have to do any work is a tiny apartment and I don't think it would be safe to do any work in it. I would be glad to know of glass working clubs that provide space for people to work and opportunities to learn more about glass working. For my purposes, the best thing would be the website of an umbrella organization for people interested in glass working and which has information about local clubs that will enable one to find the nearest club in one's geographic area. The American Go Assocation has such a facility, for example, for Go clubs. I'm aware of some specialized programs in glass working. For example, at Salem Community College in New Jersey, they have a Glass Center offering a specialized program in glass work that apparently addresses many of the questions I've asked about unsuccessfully here. For example, whereas I asked in an earlier thread about shop drawings for glass work and gotten cursory answers, Salem CC has an entire course devoted to reading such shop drawings. They also have a course devoted to the glass lathe. I haven't been able to get much information about their program, and in any case I have no way of getting to Salem Community College or of paying for their program, but I think it is likely that they use books. I've been unable to determine from their bookstore's website what books or other literature they might be using and I haven't gotten any replies to my email requesting information about them. To make a long answer to 's question short, there are other alternatives besides those has listed. In my case, I am trying to learn and to plan using the limited opportunities and resources available to me. -- Ignorantly, Allan Adler * Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and * comments do not reflect in any way on MIT. Also, I am nowhere near Boston. |
#17
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"Allan Adler" wrote in message ... writes: I'm curious. Do you actually DO anything with glass? Or do you just ask highly technical questions for no apparent purpose? I believe that the most important part of any experiment or any construction project is the thought that goes into it. Oh.. Gonna study it right into submission, eh? All the book-learnin' in the world doesn't replace hands on experience. |
#18
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writes:
Gonna study it right into submission, eh? I'm managing with what I have at the moment. All the book-learnin' in the world doesn't replace hands on experience. No one said it does. That doesn't mean it doesn't serve a purpose. I'm not here to argue about the merits of reading and planning. If anyone knows the answers to my various questions and feels like sharing them, I'll be glad to learn from them. -- Ignorantly, Allan Adler * Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and * comments do not reflect in any way on MIT. Also, I am nowhere near Boston. |
#19
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Well, this thread has been pretty well beaten to death, but if it's technical
skills you want from a book, the best I've seen is (uh-oh, my brain went blank, and the book isn't readily at hand - I'll try anyway) Glassworking by Hammesfahr and Stong. It's probably out of print, but I've had really good luck searching for books on Amazon; they give numerous links for used books of the desired title. Get a torch and play as you read. A Minor torch works well for getting down the basic coordination, if that's where you're coming from. Depending on what you need in the way of electrodes, neon electrodes are easily obtained in several diameters, and even incorporate an evacuation/fill tube. In the US the electrodes are in lead glass, but I believe that Europe uses borosilicate for their neon construction. Hope you get a chance to play. Joe |
#20
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Joe writes:
Well, this thread has been pretty well beaten to death, but if it's technical skills you want from a book, the best I've seen is (uh-oh, my brain went blank, and the book isn't readily at hand - I'll try anyway) Glassworking by Hammesfahr and Stong. I read a book by Hammesfahr about 20 years ago, published by W.H.Freeman in San Francisco. At that time, it was a lot harder to search for used books and I eventually gave up. Thanks for reminding me of this book (if it is the same one) or pointing it out (if it isn't). I didn't read it that carefully and it would probably be good to reread it now. Get a torch and play as you read. A Minor torch works well for getting down the basic coordination, if that's where you're coming from. What do you mean by a "Minor torch"? Do you just mean a propane tank or mapp gas tank with a torch attachment? It really wouldn't be safe to use my apartment for this and I'm not sure my lease would allow it. There is no yard to use. So, I'm not sure I can provide myself a place to work. Best would be a club of some kind that would provide such logistical supports. When I'm better educated in this craft, I might have more sense about what kinds of risks are reasonable. Right now, I think I need more responsible people taking an interest in any glass working activities I do before I try actually doing anything. Reading is a lot safer in the absence of that. Depending on what you need in the way of electrodes, neon electrodes are easily obtained in several diameters, and even incorporate an evacuation/fill tube. In the US the electrodes are in lead glass, but I believe that Europe uses borosilicate for their neon construction. That's good to know. I'll start looking into what is available. Actually, there are probably places that make customized neon signs. Maybe I should talk to them about this construction problem. Hope you get a chance to play. Thanks, me too. -- Ignorantly, Allan Adler * Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and * comments do not reflect in any way on MIT. Also, I am nowhere near Boston. |
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