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David Stiles

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Everything posted by David Stiles

  1. Yes, understood. However if using lime, it seems that it is best not to add it until after long cook.
  2. So, in that case, me adding calcium hydroxide before long cooking is definitely counter productive to developing red colour.
  3. I am interested in knowing more about this. Are you using vinegar? How much/when?
  4. I wrap the ribs in baking paper. It keeps moisture in a bit longer and provides a bit of early warning of burning.
  5. +1 vote for makingtheviolin.com I pretty much made my first violin from the information there.
  6. I recently bought a cosmetic wax melter from aliexpress. I half fill it with water and put glue in a small glass jar in the water. Works well but I had to use a thermometer to calibrate thermostat dial.
  7. Sorry Peter, I don't get it. What is the difference in process that makes one peice darker?
  8. GoPractice, you are certainly poetic today. Thanks
  9. Yes, I made a camber template as per John Stagg book. First test stick used his recommended graduations but it was clearly too soft. My Pernambuco is not quite up to stiffness. These bows are hex, up to 0.5mm oversize everywhere except the handle and stiffness is good. Weight 64g & 66g and balance point 195/200mm from frog. They both pull very straight when wound up. It would be nice to get weight down & balance point back towards frog but I can't quite see how to do that without losing stiffness. That seems very true. I feel that increasing the centre diameter made all the difference. Maybe I don't need to increase the diameter near the head but if I didn't the bow would not pull straight.
  10. My bow tips arrived from Bow Works & I finished off two bows. I bought the frogs in. Both bows play well enough but are a few grams too heavy. I have a lot of blanks from this plank and it would be good to figure out how I gan get weight down without losing stiffness.
  11. I used a very similar recipe with good results. Only difference with my recipe was that it had about 3g of Calcium Hydroxide to the colophony. For some reason, after 20 hours cooking my colophony only reduced in weight be about 25%
  12. Now I am working on the top. I want to try arching without templates. First gouging: Then flattened edge platform at 5mm thickness using a Safe-T-Planer, and continued gouging: Tidy up with finger plane: It's still way too full. Not trusting my myself and temped to get the templates out.
  13. Just to let you know in case it helps with debugging: Maestronet was off-line in Australia for some time this morning. Also had the "domain expired" page from Network Associates message a couple of days ago. US Proxy server did not help. Thanks
  14. While waiting for bow tips, I am back onto violin no.4. When I sawed out the back I left the button on tick! Then decided to saw of some thickness from it. Cut down the end grain leaving about 6mm thickness, tick! Then cut the waste off, from the wrong side!! Now I get to practice a Button Graft.
  15. I have planed my next two sticks down to near finished octagon and they seem plenty stiff enough but look like ending up at around 66g as complete bows. I might be able trim a gram or two but that seems like the best I can get with my timber. If I can get balance right then maybe this is OK?
  16. I've been messing around with bow making for a few weeks now. I have really enjoyed the process, it is so very satisfying. The Ipe amarillo turned out to be unsuitable. It will not plane without badly chipping no matter what. I have cut some blanks of the Pernambuco from the slab pictured above and made a few practice sticks, breaking a few along the way. It is beautiful to work with. I have a problem with stiffness. With recommended graduations, the bow ends up at 60g (with no winding) but is too flexible. I can't increase graduations or it will be too heavy. Are there any tricks to make a reasonable bow from lower grade pernambuco? Maybe less camber? or less hair? It would be nice to make some use of it.
  17. That is a very good question. I recently made a bow from a nice Australian Timber that has similar density and modulus of elasticity range to Pernumbuco. I also made a bow with some Pernambuco. They both measure same deflection on a 'Stroup' test. The Pernambuco feels stiffer in the hand and I can't understand why; perhaps it springs back faster?
  18. I rummaged around a timber yard today and scored a nice piece of Pernambuco and some Ipe Amarillo. Both about 1050Kg/m3. This could give me more than a lifetime supply of bow blanks.
  19. Meanwhile, I have been distracted by trying my hand at bow making. A while back I had a piece of Queensland (Australia) rain forest timber for a guitar fretboard. It had a density of 1050kg/m3 and Modulus of Elasticity of 19.2GPa. Quite similar to Pernambuco. I thought this was interesting and obtained another piece of suitable size for violin bows however this piece turned out to be lower density; 890kg/m3 and lower MOE; 1.57GPa. I went ahead with a few practice sticks and it is very nice to work with. First attempt ended up a good weight at 38g but too flexible (according to Gianna Violins measurement system). Second one is 41g and a bit stiffer but not quite enough. Both are octagonal and a little over size (according to John W Stagg's book). I feel that to get the a good stiffness with this timber, a bow will end up too heavy. If I can get hold of a denser piece like my original fretboard it could possibly be spot on.
  20. I finished my garland, here are some pics:
  21. The size shape and blade angle are what I need to work out. I have just tried a 50mm ibex finger plane clone with blade in reverse; bevel up. Blade is about 40 deg + bevel of 25 deg makes total of 65 deg. It works kind of OK but I am getting some chattering. Makes me wonder if the commercially made 90deg options are a good idea.
  22. Does anyone use these? They have two sizes, flat and curved.
  23. Forgive me for resurrecting an old thread however I feel this discussion has a way to go. I am at at this place. It seems that scraper planes are best option. If I were to get one of Lynn Hannings', what size would be best; small (55mm) or medium (93mm)? And should I go flat or curved?
  24. Hi John, that looks great. I might have to steal some of your ideas.
  25. Thank you all for your comments in the fungus affected maple. The supplier has agreed to replace these backs for me. There will be a delay getting them so I have decided to use a torrefied set from Switzerland that I was going to save till I had more practice. The spruce has a density of 0.41 is very close grained. The maple is 0.61. My last violin had similar timber and I found the plates were very stiff. This time I think I will lower the arching a bit. Nice to get started.
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