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    San Francisco Peninsula, CA USA
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    Music, violin playing/making, woodworking/furniture design/making, bicycling, I'm owned by a dog,

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MarkBouquet's Achievements


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  1. Oh, is that right, vda? https://fishbio.com/field-notes/the-fish-report/stinky-salmon-natural-fertilizers And prior to placer mining, the Sacramento River was deep water navigable to Sacramento. Now the Federal government spends a couple hundred million $ per year dredging it to keep it marginally open, and to control flooding from the annual spring runoff. And might I point out that your article was last updated 11/12/20, ten whole days ago, and a lot’s been learned about California geology since then. And we were talking about corners on violins until David B. Posted a video about scantily clad young women riding off road vehicles around in mud. How was that related? I can’t believe this place.
  2. OK. We had a 19th century phenomenon here in the Sierra foothills of California called placer mining. It silted the rivers, Sacramento River delta and San Francisco Bay, essentially for all time. It suppressed the salmon and steelhead runs so they’ve never been the same since. (Millions of years of salmon and steelhead runs were the very reason California had a fertile Central Valley, and coastal forests like nowhere else in the world. The fish were the fertilizer.) The scars in the foothills will remain for thousands of years. Some people recognized from the beginning that placer mining was an environmental tragedy, but it took many years of lawsuits to stop it, and by then the damage was done. The argument of the placer miners, through all the years of lawsuits, was that it was their private property, to do with as they wished. My original point, and you’re entitled to disagree, I guess, is that awake and aware human beings should care about about this planet. It should hurt to see it torn up for no other reason than to entertain some, and profit others.
  3. I knew that, and I was just kidding about the masks. Having said that, there’s something appalling about delighting in tearing up our Mother Earth like that. It’s kind of embarrassing. And I don’t mean to point the finger at you either, Mr. Burgess. I’m guessing that you weren’t there. You were just demonstrating your talent and aptitude for sarcasm.
  4. Microphone placement is mission critical when recording a violin. Also, the room and your position in it, and a bit of reverb can be very helpful. I have no doubt that your microphone is up to the task, you just have to take care of everything else. I would also point out that a violinist really doesn’t know what their violin playing sounds like from a distant listener’s perspective. This is why they should always bring someone else along to play any instrument they’re considering buying, so they can hear that distant sound, which is usually better than the player’s experience. My point is that your dad likely doesn’t really know how he sounds from a distance. I recommend studying this page: https://reverb.com/news/how-to-mic-violin-viola-and-cello-at-home-or-in-the-studio
  5. I was passing through a farmer’s market this morning, and there was a person operating a mobile sharpening service. I thought some of you might find one of his machines interesting. I asked him if he made it, and he said no, but it was highly modified. It’s two 1”x30” belt sander/grinder machines side by side. 1800 rpm motors with small drive wheels resulting in 800 ft/ min., which he said was “why I like it.” He had other machines but this one caught my eye. And he admitted that he couldn’t sharpen plane blades or chisels, mostly knives, hedge shears, pruning shears, scissors, etc. But the machine is interesting.
  6. There are these, and maybe others too, that claim to do exactly what you’re asking for. Reasonably priced too. But this company has online videos showing how to modify your motors to work with their devices, including removing the start capacitors from the circuit and changing some other connections. I’m left uneasy about modifying the rather beautiful American industrial quality motors that my machines have. I wonder what the motor manufacturers (Baldor, Leeson, Marathon) might say about this. I’m inclined to let you try it first, and I’ll wait for your report. https://www.ato.com/single-phase-vfd
  7. Thank you for that advice, Don. My wheel grinder lacks a start capacitor, but my belt grinder, which is just 1/3hp, has one and would undoubtedly be damaged by running at lower speed. Another possible issue is cooling. I read years ago that ac motors designed to run on European 50Hz power would be safe to run on American 60Hz power, they’d just run a little faster. But motors designed for 60Hz American power would run slower on European 50Hz, and therefore might not cool properly. And the centrifugal switch might not open. Update: as I read more about VFD’s, I realize that they’re not really designed for single phase motors at all. There’s the capacitor switch issue, grounding issues that can damage bearings and other parts, and a list of other problems. VFD’s are not a panacea for those among us seeking to slow down our basic workshop machines. And now I realize why I’d never heard of them before.
  8. I read this and thought “what’s a VFD?” So I looked it up, and I’ve realized that a variable frequency drive could be extremely useful to me for slowing down my belt grinder, and my wheel grinder too. I’m seeing that there’s a huge range of prices, some very expensive and some pretty cheap. Does anyone have any experience with these to share? And thank you for the tip, Jackson.
  9. My 1” belt sander/grinder has an 1800 rpm motor, but a 4” drive wheel, so the belts run at 1885 ft/min, which is 1/2 of the rim speed on an 8” wheel grinder running at 1800 rpm. I still have to be careful about overheating though. I often wish that I could slow it down more. And I added a reversing switch which is great when using a leather strop belt, and for a surprising number of other tasks too. I had an electric motor service shop wire the reversing switch into the machine, and altogether this belt grinder was an expensive investment, but very useful.
  10. Do you think that Homer Clark would have inserted that Guadagnini 1773 label in his violin, or would you assume that to be a later embellishment?
  11. I don’t know the answer to your question, but one could assume that the introduction of steel strings made fine tuners obligatory. Prior to that, they really weren’t needed, or at least they weren’t necessary.
  12. I agree. I tried to watch it, but halfway through I realized that my mind had wandered elsewhere. That’s when I turned it off.
  13. Herdim clamps are claimed to be made from polyurethane, while the Chinese knockoffs that state what they’re made from, say they’re made from ABS. Here’s an article from the automotive industry discussing the relative merits of each product, and one factor that stands out is ABS’s natural resistance to UV light, which polyurethane lacks. If I had Herdim clamps, knowing this now, I’d store them in a dark box or drawer. And I noticed that some of the Chinese knockoffs seem to have figured out that there needs to be that step difference at the jaw surfaces. Well....., at least their photos seem to suggest that. I guess you don’t really know until you open the box. https://www.theengineblock.com/polyurethane-and-abs-whats-the-difference-and-whats-better/
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