![Benjamin Kratchmer](/img/default-banner.jpg)
- Видео 13
- Просмотров 30 680
Benjamin Kratchmer
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Добавлен 28 апр 2020
The RUclips home of woodworking designer/maker Benjamin Kratchmer.
More on Benjamin's work at www.theperseveranceworks.com
More on Benjamin's work at www.theperseveranceworks.com
Announcing the #OVCOLute
This fine Renaissance lute of 7 courses in G is for sale to benefit the Oneota Valley Community Orchestra at galabid.com/OVCO
This instrument on commission would be over $4,200 and have a one year lead time. This is your chance to have a fine lute in a matter of weeks!
Thank you for watching, and for sharing! Supporting community music means the world to me. #lute #ovcolute #charityauction #helluvadeal
This instrument on commission would be over $4,200 and have a one year lead time. This is your chance to have a fine lute in a matter of weeks!
Thank you for watching, and for sharing! Supporting community music means the world to me. #lute #ovcolute #charityauction #helluvadeal
Просмотров: 476
Видео
Quick Tip: Preventing oil stains from bone
Просмотров 1314 месяца назад
A simple process for ensuring bone fretnuts or inlays don't leach oil into the surrounding wood.
Flattening by Hand
Просмотров 6423 года назад
A flat face is the first step in any woodworking project. But what if you don't have a jointer, or your billet is just too big to pass over it? Learn how to flatten any board by hand!
Finish Milling and Wood Movement
Просмотров 3743 года назад
A quick update from The Perseverance Works, and a bit about how to mill wood to prevent parts from deforming. The new camera works but it will take a bit of practice to get the depth of field and focus right! www.theperseveranceworks.com
Theorbo "Live": Bending the first rib!
Просмотров 14 тыс.4 года назад
Benjamin prepares the mould and bends the first rib. Sorry for the weird format/gaps in this one. It turns out when you make a joke about your low budget camera setup you are dooming it to failure. (And let's not talk about my relationship with the editing software!) Subscribe so you know when I schedule our upcoming live Q&A session!
Mixing Hot Hide Glue
Просмотров 3 тыс.4 года назад
A quick primer on the why and how of hot hide glue in the woodshop. Hide glue is rigid, repairable, and fast!
Theorbo "Live:" Making Spacers
Просмотров 2,9 тыс.4 года назад
Cutting holly (Ilex opaca) into the rib spacers for the theorbo. Now with less talking, more doing, and bonus transitions! www.theperseveranceworks.com/
Theorbo "Live:" Making templates and roughing out ribs
Просмотров 2 тыс.4 года назад
In which Benjamin prepares templates for the ribs of the theorbo, aligns all the blanks, saws the first rib out, and edits the dead air out of his video 24 hours after swearing he will never take the time to edit video. www.theperseveranceworks.com/
Theorbo "Live:" Planing Rib Blanks, and our new format
Просмотров 8464 года назад
In which Benjamin explains the transition from Live to pre-recorded, and shows the final surface preparation of rib material for the theorbo. www.theperseveranceworks.com/
Hi Benjamin. Where do you recommend purchasing a glue pot without breaking the bank? Thank you for your video.
That has become a tough question to answer with Hold-Heet out of business. It has a lot to do with how much glue you need hot at once; If you do veneer work and need a large volume then I think Dictum has the only current production option. For smaller volumes of glue (like most luthier work or small furniture projects) an adjustable baby bottle warmer can work. A thermostat-controlled hotplate and small ban marie also work. The cheapest option is to boil water and then submerge a jar of gelled glue in it until it's liquid, but it's less convenient than a constant heat pot.
Looks great. Why coat the mold in shellac instead of a spray poly or even a spray shellac, which would go 10x faster?
It's what I generally have on hand, it's fast to dry, and it's easy to recoat even after the form has been waxed and used. Spray shellac would work well, too.
What a wonderful thing to be doing for the community! I am jealous, while I have the Lundberg book and have started building a descant, I have yet to finish the bowl. That 3D woodworking sure is a challenge. Seeing what you have built is both an inspiration and a curse, trying to get good enough to donate such an instrument to someone for a good cause. You have done wonderful work, and clearly have a good eye for beautiful wood. Thanks for sharing this. BTW, how much did it finally sell for? I hope it was worth the sale.
I think the Lundberg is an incredible reference but I do think there are places it suffers for the expertise of the author-- namely in the fitting of ribs. It is a testament to his experience that he could do it on the form with chisels and files, but I think it is a very hard way to learn! I personally prefer a setup more like a Cooper's plane, only using a chisel or file if I have found an error in a rib already glued in place. The Lundberg technique compensates better for a form that isn't geometrically perfect, though, so it's all about choosing your battles. I wish you all the best with your descant, you'll get there in time!
@@benjaminkratchmer8124 It's interesting, some of the things he didn't go into. Like the fluting of the form, which he shows in pics but never mentions in text. I figured out how to do it, and so that's not an issue. But it's clear to me that he knew how to do it so well that he just didn't even consider parts of it that heavily. Don't get me wrong, I consider it a gift, as there really isn't all that much else that I've found that isn't either a reprint of a 16th century book or is written with guitar construction in mind. He was a good writer, and the pics of his instruments show that he definitely knew what he was talking about. Thanks for the encouragement, I have a bunch of them in mind before I stop this foolishness. I look forward to seeing and hearing more of your work.
Beautiful work!!! It’s been a joy following the story.
Thanks for following along!
Great that you've done this in support of the music community. An immense amount of care, effort, time and love goes into making an instrument such as this and they sound just fab. :) :)
Thank you! It was a really meaningful opportunity for me, and I'm glad to support community music through my work.
Bending the ribs is a skill that has to be acquired. I made a mould and cut out ribs, planed and scraped them to size. However, I've tried hard, and I'm not one to give up, but I can't get the ribs to bend into the correct shapes, so my Lute building project has sadly stalled.... :(
It takes some time to learn how the wood feels when it's ready to bend. What species, how thick, and what kind of iron are you using? I am sure your project will move forward again!
I have used hide glue for box making and quite enjoy they process. I have done some hammer veneering and would be quite interested is seeing more instruction on using hide glue and hammer veneering when laying veneer on something like a cedar or blanket chest.
It's a lot of fun and a great way to do complex layups with less stress than a press or vacuum bag, in my opinion. I'll see if I can put together a tutorial video!
!!! tuxedo kitty !!!
I have been trying to get one of these for a couple years now. The last I missed sold for 510. What are good alternatives to the hold-heet pot to consistently heat
Nice to see you posting lute content! I'm 7 ribs into my first attempt using the David Van Edwards course. Your prior videos have been so helpful to me as I've been figuring this whole thing out! ❤
Glad it helps! David's course is a fantastic primer, keep at it and you'll have a nice instrument and a tremendous amount of gained skills at the end!
Aaa what is it?
Found this very helpful - I've watched a fair few videos of flattening but liked your explanations and seeing the process all in one go. Thanks!
Glad it was helpful!
hide glue is really out standing within glues, thanks for the video
Thanks for watching!
is the rib really from walnut wood ? it's very shaped like to mahogany wood
Yes, it is! Walnut and mahogany have very similar pore structure, especially when the walnut is quartersawn like this.
How much play do you have to work with when doing this? I.e. maybe it isn't perfect, but then you tape/glue it together and it pulls it all together. How much give do you have, about?
@@benjaminkratchmer8124 That is pretty tight! Say I'm making my first lute, and I keep things relatively simple, and it's just going to be my own instrument, I'm guessing I could get away with a bit better tolerance than .05... But I guess you also say use spacers. Could I also use some thin shavings of wood and hide glue to hide some of these gaps, especially as I get started on making my first lute? I'm assuming that my spacers will be pretty flat. I guess I'm also a little confused on how one controls getting a hollow-shaped rib vs. a flat rib.
You did an excellent discussion. I’d love to see more of your educational material on woodworking techniques
Thanks, will do!
This is a man of science talking, isn't it?
My background is indeed varied, with a stint in biology research.
Outstanding content. Immediately subbed
Awesome, thank you!
@@benjaminkratchmer8124 and thank you, too
Thank you very much for an excellent and concise explanation.
I really enjoyed your theorbo making series. I think a lot of people would love to see some sort of update, even just a quick video to see how far you’ve gotten with it. Good luck with the instrument, and with all your projects.
I notice you are using 251 strength glue, it appears that there is also 315 gram strength. For guitar building I am concerned about gluing on the bridge with the constant pull of the strings, which would you use? Also I have read about bone glue, and rabbit skin glues, both other types of hide glue, have you ever tried these? I am looking at switching to hide glue and shellac not only because they are great materials but more environmentally friendly than the chemical based alternatives. Thanks for doing this.
so simple process need 13 min video. what happens if described process will be more complicated? 5 seasons 4 episodes each 50 min long.
Game of Glues, coming soon!
@Benjamin Kratchmer Hi, and thanks for the video! I posted this comment in another video of yours, but I thought I would mention it here too. just wondering if you will be making any more videos? I can't seem to find anything newer than 2 years ago, but I did see some more recent comments about building a baroque guitar etc. I'd love to be able to watch any videos you make on the subject of instrument making, and to find out what you're up to in general since the pandemic! Thanks very much!
That was surprisingly satisfying to watch all tye way through.. like woodworking asmr
Glad you enjoyed it!
Informative video
Thank you I will be back
Thanks for this concise answer to this specific question.
This is a couple of years old now and I watched it yesterday. I just saw a short video on rib bending for a oud and here is the link ruclips.net/video/sIh78Trp9AA/видео.html
Yes, would love to see more about hide glue and the theorbo build too! I like your presentation of things. No loud annoying music and unnecessary long introductions, nor slapping the camera with your palm, etc.
Where can one find the earlier footage on facebook? Also, are there anymore videos following this. I want to build a lute and detailed videos on the construction are rare. Please continue to post more.
I'll see if I can find a way to bundle them together and link them. More videos will be coming-- hopefully soon-- but unfortunately taking video and getting it trimmed up takes a lot of time! I'm finishing up a video about making a baroque guitar mold, and I'm considering doing an instructional series on a smaller instrument.
hola Benjamin ,sera posible que compartas los planos con sus respectivas medidas?
I do not own the rights to these particular plans as they are not my own measurements. There are good working drawings available to purchase from the Lute Society. You can also buy measurements from many museums but be aware these are 'as is' and may require correction/interpretation to be working drawings for building from.
como se puede conseguir los planos?
Wat is “holle” wood?
Holly, when talking wood, is harvested from Ilex opaca, a North American shrubby tree with almost no tannin in the heartwood. It stays very bright white for many years if it is harvested in winter and immediately dried, if cut wet in summer it will turn blue-gray from fungus!
@@benjaminkratchmer8124 ik dacht aan esdoornhout, Maplewood. Bedankt Benjamin.
Thank you for all that you share with us as an art of making lutes. I would like to know how can we locate the width of the soundboard. Where exactly on the soundboard is this width located?
The width at the widest point can be found a number of ways. On more primitive instruments it is simply twice the highest point of the back, since they had regular hemispheres defining their shape. As the backs of lutes became more and more flattened the width was based on other geometric ratios-- I highly recommend reading the work Robert Lundberg did studying period instruments and laying out their shapes.
Thanks for sharing this process. I've just started making a Baroque Lute from a plan. Just building the mould and good to look ahead here to cutting and forming the ribs. It would be interesting to know whether the rib material is flat sawn or quarter sawn and if it matters...
Rib material is usually quartersawn unless using a wood where the figure is only seen on the flatsawn face. I've not done any side by side tests to compare, but in theory the quartersawn is more resistant to loss of shape and breakage around the curves than flatsawn.
@@benjaminkratchmer8124 Thanks for reply, I acquired some quartersawn yew and just starting to trial bend that :)
can I know how much the thickness of the ribs please ? many thanks
It depends a bit on the size of the instrument and the material chosen, but somewhere between 1mm and 2mm is typical. For this instrument they are 1.5mm.
Thanks, this was very helpful and interesting. How do you turn a technical drawing of an instrument into a mould in the first place? You mentioned there was some kind of livestream that preceded this video - is that available somewhere to view?
You're very welcome, James! There are a few different ways to go about the making of a mould, and each has its own set of steps for getting from drawings to reality. I should do a quick video explaining some of it for the RUclips audience-- thanks for this reminder of an interesting and important topic! I had livestreamed a fair number of times on my personal Facebook profile, where the streams should be publicly viewable still. Some were cut into a bunch of fragments by spotty internet, some are in once piece. Let me know if this helps!
@@benjaminkratchmer8124 Thanks Benjamin, I'll go and dig out those facebook videos. I for one would certainly be interested in what you have to say about making moulds. I have made one already following David van Edwards' instructions but am currently try to figure out making one of my own for a different instrument. I've been enjoying your videos on other aspects of the building process too. Very helpful! How is the instrument you're building here coming along?
James, I'm currently figuring out how I'm going to make a form for a baroque guitar, and that will include some similar techniques and considerations. I'll see if I can put together a video about it! Otherwise I am also working on setting up my shop to do live sessions, specifically to show certain processes and allow for Q&A sessions. Once I'm set up for that I think there are several of us who would enjoy a scheduled chat about form-making. I'll keep you posted!
@@benjaminkratchmer8124 Sounds interesting, please do!
Great explanation of wood movement. I like you mentioning how much to take off at one time, 1/8th. This is helpful in that I built a book case a while back and a portion of it split because I did not allow for wood movement. Thank you again for your insights!
Where would I go to if I wanted plans for an eight-course Renaissance Lute? I have seen a book on the subject which costs hundreds of (UK) pounds so that's out. There are "images" of plans on the web but there is no detail. I've got most of the wood I'll need and all of the tools so am ready to go! Thank You. I'm looking forward to seeing the completion of the Theorbo!
I want to set up an oud workshop in my own home, can you help me with the necessary equipment?
I've never made an oud so there might be some differences in how they are made, but if you have questions about general tools for getting started I'm happy to share my thoughts some time.
you are doing a valuable job my friend, continue making videos
Just a couple of things, first, you don't need a scale to mix glue, second another really good warmer is an electric fondue pot, I have used one in my shop for years and it works great, you just have to keep adding water, also, buy an inexpensive christmas light timer, I plug in my heaters to it and set it for six hours, then if I forget to turn them off, it does it for me
Yes, a scale is definitely not a must-- I've found it to be a great way to always have glue that is consistent, but mixing by volume works too with a bit of adjustment. It's all about learning how you like your glue, and having a repeatable way to make it that way. The timer is really clever-- I have an old digital one for vacations where you can set days and hours to run, might automate my pot for 9-5 Monday through Friday!
Very useful information. thanks!
Glad it was helpful!
2 things: how thin did you cut that strip (i'm assuming between 1/16 and 1/8)? also did you do that dry? like no presoaking?
These ribs are about 1.5mm thick when they are bent. Depending on the density of the wood used they may be a bit thicker or thinner. The bending is done dry, with material this thin the heat conducts quite well through the wood without the use of water.
this is an excellent tutorial, i don't have much to complain about from this distance, your camera equipment seems to be fine lol
sucks that yer phone died for this tutorial though :(
The phone died doing what it loved, I hope.
@@benjaminkratchmer8124 lol
Nacer Bensfia Thank you very much for sharing this technique for making spacers. I am an amateur oud maker and I needed a spacers manufacturing model, it is really useful to me. I think this is the only video on this topic on youtube. thanks again.
Glad it was helpful! For other ideas and techniques you might look at furniture makers who are producing "stringing" for inlay. Very similar, we just are more particular about which way the grains runs since we are bending it.
@@benjaminkratchmer8124 Hi, just wondering if you will be making any more videos? I can't seem to find anything newer than 2 years ago, but I did see some comments from 7 months ago about building a baroque guitar etc. I'd love to be able to watch any videos you make on the subject of instrument-making, and to find out what you're up to in general since the pandemic! Thanks very much!
Great work. Would be really useful to publish a video detailing the making of the form, together with measurements which make it possible to make the form.
Good job brother...am from morrocco..you are prof
Seeing this in live is so helpful. Theorbo making is quite a niche hobby to get into, and finding the appropriate litterature can be exhausting. I cant thank you enough for sharing this ! Edit : if you could get into the process of acquiring the bending iron in the future, that would be so neat !
I'm glad you enjoy these videos! This started as way to provide some entertainment during lockdown, but I also think there is value in videos of craftwork that are not accelerating a 120-hour process into 10 minutes. I hope to, in essence, video-blog the creation of this instrument with a lot of real-time explanation of each step even if there is some work done in between that gets sped up or is off camera.