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Bob Blarney

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  1. As mentioned directly above, cutting speed is very important. Usually I find Dremel tools to be weak, but in this case it may be the best tool available to you. If it can be fitted into mechanism similar to a drill press, then so much the better. I made such a thing using linear bearings and precision drill stock and acrylic blocks (it's really ugly but it works), and I lower it down on to the stock with my fingers to feel how it's drilling.
  2. Exquisite engineering and workmanship. But it may be beyond the means of many modelers. A simpler jig can be made - look up how traditional flyfishing rods are made. That jig, with a Stanley 60-1/2 or Lie-Nielsen 102 block plane can do fine work for masts too.
  3. we're making masks for the medical caregivers too. But now elastic is out of stock, so we're making them with long ties that can be trimmed to length. My daughter creates fabric print designs and contracts with a printer to produce a sampler proof cloth for the designs. She's now cutting up the proof samplers for masks.
  4. Resawing on a table saw has some disadvantages - it wastes (expensive) wood, and there are instances where it could be dangerous. I've resawn granadillo (a very hard rosewood) 1"Th x 11"W into 3/32" Th x 11" W veneer for guitar parts, using a riser block on my old 14" Delta Milwaukee with a 3/8" x 105" Lenox Tri-Master blade, and a high fence. But here's one technique for resawing using both a table saw and a bandsaw: 1. On the table saw, cut a 3/8" deep groove on the edges of the board 2. On the bandsaw, place a wooden table on top, drive a 6p or 8p nail just before the blade and clip it about 1/4" high. Now you can use the clipped nail to register the edge of the board and guide it through the bandsaw. There are also 'point' fences, where a board is clamped with a sharp corner just beside the teeth of the bandsaw blade. That way the board can be skewed to cut thin slices. I don't find that to be good method. But here's the safest way, which I'd do from now on: https://youtu.be/VNbq4WuJmRk
  5. You're welcome. You could make the fixture larger and add more notches to locate additional claws. You could also use larger knobs on the toilet bolt that are easier to manipulate. The t-bolts are available in 1/4-20 or 5/16-18 sizes and different lengths.
  6. Hello, modelers may find this traditional bench fixture useful. My daughter is a professional artist, and she asked me to make a birdsmouth for her bench. So I bodged this together in few minutes, and I thought she might find a hold-down claw useful while sawing and grinding out shapes. The claw is just an arched piece of hardwood that is held by a toilet bolt & wingnut, and it can be located in the notches on either side of wooden table. When it wears out from strokes of the saw blade or other tool, it's just a matter of cutting a new one.
  7. There is nothing wrong with a bit of humor. It helps ease the anxiety and get over misfortunes.
  8. A New England Journal of Medicine scientific article of interest about the persistence of C-19 on surfaces. https://www.medrxiv.org/content/10.1101/2020.03.09.20033217v1.full.pdf?fbclid=IwAR0l3kvLNxQd_o4G_MqZiKeLcsxsbe9fNM1kIar8hwOj652ngXUo7eXqZMQ Abstract HCoV-19 (SARS-2) has caused >88,000 reported illnesses with a current case-fatality ratio of ~2%. Here, we investigate the stability of viable HCoV-19 on surfaces and in aerosols in comparison with SARS CoV-1. Overall, stability is very similar between HCoV-19 and SARS-CoV-1. We found that viable virus could be detected in aerosols up to 3 hours post aerosolization, up to 4 hours on copper, up to 24 hours on cardboard and up to 2-3 days on plastic and stainless steel. HCoV-19 and SARS-CoV-1 exhibited similar half-lives in aerosols, with median estimates around 2.7 hours. Both viruses show relatively long viability on stainless steel and polypropylene compared to copper or cardboard: the median half-life estimate for HCoV-19 is around 13 hours on steel and around 16 hours on polypropylene. Our results indicate that aerosol and fomite transmission of HCoV-19 is plausible, as the virus can remain viable in aerosols for multiple hours and on surfaces up to days.
  9. After poking around a bit more in the medical literature, it appears that some treatments show real promise in preventing severe immune responses to viral infections that lead to multi-organ failure. But there is no information yet as to whether these agents would be effective against C-19. We can only wait, be careful to heed the available advice, and hope.
  10. I do not hold that view.yet. There is a major difference in public awareness and public hygiene, but there are no, or very few, treatments for viral diseases other than supportive care, and in this case respiratory care. There may simply be insufficient medical resources to handle the patient load, if large numbers of people become ill quickly. The current public health strategy of limiting the spread is intended to slow the rate of transmission to prevent that, but the number of seriously ill and mortally infected patients could go very high indeed.
  11. As a retired Associate Professor of Physiology & Surgery (PhD), I think the current advice of handwashing and limiting exposure is about all that can be offered at this time. I am particularly interested to learn if (and if so how long) the virus may persist in the environment outside of the human body. Are some surfaces or environmental conditions (temp & humidity) conducive to survival or elimination? For instance, HIV can only live for a few seconds outside a human body. As for the potential for morbidity and mortality, it is estimated that an infected person will infect 2-3 more persons. A rough guess is that 100,000,000 citizens will be infected, and if 10% do become seriously ill, then 10,000,000 will need hospital care. The mortality rate is currently estimated at 1-3% which is far higher than influenza at 0.1% There is also the disturbance to society and the economy. In the long run, I think this will drive substantial health care reform, but I can't say what that might look like. I did take the time to look up some information in the medical literature about hospital ICU facilities. In the USA, on any given day there are about 20,000 ICU beds available of the 70,000-90,000 total. There are about 60,000-70,000 ventilators total, but I don't remember the number available on a daily basis. But there is also the issue of having sufficient trained personnel to make medical decisions and operate the equipment. What will happen if the caregivers become ill?
  12. The draconian Sedition Act of 1918 was employed to suppress information that might have been considered 'unpatriotic'.
  13. I'm a big fan of bandsaws, My remarks may not be fully applicable to your needs (a 14" with 12" depth of cut, and a 12" with a 6" depth of cut. ), but I think a couple of observations might be useful to you. I watched the sales video of the Axminister AC1400B and read through the manual. It appears to be a decently built machine for the price ($225USD) and the manual is well written . But I'm skeptical that it could properly tension a 13mm blade - that's a bit difficult even on my 1940s-50s era 14" Delta with a cast iron frame. Insufficient blade tension will be manifested by bowed and wandering cutting. I think the standard 6mm/6TPI is appropriate, or at most possibly an 8mm blade would be ok (By the way, one rule of thumb is that 3 or 4 teeth should be in the wood when cutting, although an additional 1-2 teeth won't be problem if the rate is slow enough to eject the dust from the kerf.) Other than that, perhaps modern blade metallurgy has improved the flexibility of bandsaw blades. In earlier times, blades broke quite often on saws with less than 12" wheels. Finally, if the blade tension, tracking, and guides are properly set, then it should be possible split a pencil line without a fence or miter gauge. Indeed, very fine work can be done - look at this 6cm tall reindeer that Alex Snodgrass (see above) cut out freehand for my young daughter, all the while conversing with the audience at a woodworking products show.

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