Strategies to minimize wood movement
Вставка
- Опубліковано 1 бер 2023
- Rob Cosman discusses several different techniques he uses to minimize wood movement.
----------
If you like our content please LIKE us, SUBSCRIBE to our UA-cam channel, and RING THE BELL to be notified whenever we release a new video.
_______
* SUBSCRIBE TO ROB"S MONTHLY WOODWORKING TIPS NEWSLETTER - lp.constantcontactpages.com/s...
* SUBSCRIBE TO ROB'S UA-cam CHANNEL TO TAKE YOUR WOODWORKING TO THE NEXT LEVEL: / robcosmancom
* POPULAR VIDEO PLAYLISTS:
- Sharpening Plane Blades and Chisels: • Sharpening Hand Plane ...
- Hand Plane Basics: • Hand Plane Basics
- Woodworking Tips and Tricks: • Woodworking Tips & Tricks
- Hand Cut Dovetails: • Dovetails by Hand
- Best of Rob Cosman Videos: • Best of Rob Cosman You...
- Tool Reviews: • Tool Reviews
- Rob Cosman Workbench: • Rob Cosman Workbench
* SUBSCRIBE TO ROB'S ONLINE WORKSHOP - robcosman.com/pages/rob-s-onl...
* LIVE UA-cam WORSHOPS - Every other saturday at 6:00pm Eastern Time
* QUESTIONS - Have a question about the Tools, Techniques, or Anything Else you saw in this video? Post your question in the comments section of this video!
* VISIT OUR STORE - To learn more or purchase any of the tools you saw Rob use in this video, please visit our retail store at www.robcosman.com
* LEARN ABOUT ROB'S PURPLE HEART PROJECT: robcosman.com/pages/php-what-...
* DONATE TO THE PURPLE HEART PROJECT: robcosman.com/products/how-to...
* FOLLOW US ON SOCIAL MEDIA:
FACEBOOK - / robcosman
INSTAGRAM - / robcosman_handtoolwood... - Навчання та стиль
Hello Rob, my husband and I are from Peru we made wood characters with different kind of wood and now tried our first wooden box. We want to thank your videos they’re very instructive and helpful.
Rod, your channel has some of the best content related to woodworking. Keep up the great work.
You keep watching and we will keep filming
Thank you Rob - great info
Awesome video/info Rob! Thank you...
thank you Rob
Thanks
Great information. Thank you!!
You are so welcome!
thanks
Dang Rob. Hell of a main you have going there. This video along with JKM's video that includes data on how much each species can move are very useful
Go get a copy of Hoadley’s book. It has all the formulas and details on wood movement a great reference.
Thank you for video by the way. Very helpful information.
Thanks for watching
Thanks again Rob Julien Lamarche
Thanks for sharing that!
No problem!
This is really great content, and excellent teaching
Glad you liked it
Thank You very much, very helpful video!!!!! As always!!!
You bet
Very good, very informative.
Glad it was helpful
That was very helpful, thanks.
Glad it was helpful!
Great information.👍 Thank you for sharing.🙂🙂
Thanks for watching
I deal with a lot of 8/4 and 12/4 walnut. Air dried, kiln dried. I also use my moisture meter, all my stock is sub 8%. That makes a big difference right away. Also, as you pointed out if it’s highly figured, then you have to account for it. My method mill it oversized , wait a couple days and measure see what happens. For example, a table I’m finishing up has a finished size of 8/4 on the dot. I bought the walnut in October 2022. I only issues with one board that was 9 foot long and was highly figured. It moved a lot, but it was my centerpiece so I got to 1 3/4 while rest was 2” and had to feather the bottom for the apron. It took a month for that piece to behave lol.
If people reading this get nervous, don’t be. Woodworking is an adventure and if you are patient you can control the narrative.
That's a very interesting video! This kind of things, as my old friend Giuseppe would say, is kind of "80 years in 10 minutes" 🙏🏻🌞
Thanks for posting
Thanks for watching
Thanks for watching
HI rob that was so good. I always go to nearest to what I need and then I am in trouble. lol
This was very helpful
glad I could assist
Great insight
Thanks for commenting
Thanks great info
Thanks for watching and commenting
The more I learn from guys like you, the more I want to find à different hobby.
So much to learn! I know NOTHING!!!
Not really because with Wood it applies universally. So you just need some basic skills, good tools, and an understanding of what movement
Спасибо!
thanks
If you liked this video check out Rob's other video on wood movement: ua-cam.com/video/vHkZG-HDelQ/v-deo.html
Looks like Rob also likes the "David Charlesworth" hair trick.
I was thinking the same thing. 😆
yes I do
You mentioned it in passing, but cutting your rough lumber down to approximate size, letting it sit a couple days before milling makes a big difference both in staying square and minimizing waste. Imperfections in squareness amplify the larger a piece is - a small twist in a 2 ft board might require removing 1/16" to square, but that same twist on a 10 ft board could take 1/2" or more...and then cutting that 10 ft board after milling might release more tension, requiring further milling.
You are 100% correct
I can now go to the store to buy the correct wood. Bring it home and work with it knowing how it might react. Very useful information that most people don’t usually think about. Excellent video thank you for sharing your knowledge and experience. Take care. 👍🏻
Thanks Kent and thanks for doing the Php Facebook page
Thanks🙏👌🌹
You’re welcome 😊
Hi Rob, thanks for your insights, it will certainly help me in the future.
I notice that on some furniture (dining table, outdoor tables or seat slats) they put a groove down the middle of the board (on the underside). I think this is to avoid cupping.
As I'm currently building a garden bench, I was wondering whether this would help, or whether the wood would just crack down the middle.
Do you have any thoughts on doing that?
great information, thank you a lot for that. It would have been great too to talk about panel creation and how you lay out the wood board to avoid global cupping (like in your video front picture).
Go watch my video on breadboard ends
I am completely new to woodworking, about 3 months in. Helpful video, the end when Rob mentioned 40% waste blew me away.
Just wait till someone asks you to build something out of some exotic wood that costs $150 a board foot...
The secret to woodworking is straight square wood. And to get that you need to be prepared to through some wood away that won't cooperate
Thank you very much Rob. First time i tried to resaw a 1 x 3 feets by 1 inch thick flat sawn fir board by hand, I ended up with two hugely and simmetrically cupped boards. What would you do? Would you clamp them back together and let them dry or the stress of clamping would check and crack them?
Rob, Love the videos!!! Have you done any videos on a complete project start to finish? For instance Chair, table, case work?
Thanks and keep videos coming!
Many, however they are in my online workshop, that is a membership site accessible on my webpage, robcosman.com
I had no idea torrefied wood had any applications outside of lutherie. I know it from acoustic guitar building, every guitar manufacturer has a special name for it but it's all basically torrification, which changes the sound. It's supposed to make it sound like an aged, played-in instrument, I don't know about that but I have played some that sound incredible. Specifically ones made with torrefied Sitka and Adirondack spruce.
I've just done this. I'm building some shaker style cupboard doors for someone and worked out I needed 10 lengths (2.5m) bought 14 and glad I did as 3 turned out to be as straight as ocean waves
There you go. I have been there too
Hi. Fairly new to woodworking. I’ve done a few softwood projects and going to start using hardwood. Mainly oak and ash I expect as they are more readily available here in the UK. My question is if I am having to take my stock from 1 to 3/4 inches, I would need to do it in two stages each separated by a week to dry / settle in order for it to be really stable? Great video. Thank you😊
At 3:06 you say "there's no glue from here to here" and I wonder what it would do if it was glued all the way across. Is it a matter of it might blow that upper corner apart so you glued in such a way as to control which way to control the direction of the movement? Could you have made that frame go all way around but leave room in what would become the bottom of that frame to allow for movement but keeping it hidden? I've never seen a 3-sided frame before.
I've mentioned several times how much I enjoy these videos but I don't think I've ever mentioned the video quality. The woodworking demos and the tips and tricks are invaluable but I'm also impressed with Jake's experetise behind the camera. He really does a great job. He follows the action almost perfectly every time and gets nice, steady, clear, closeup shots whenever they're called for. Being really good at what you do must be a Cosman family trait. Because Frick handles his part of the live streams really well too. Whoever does the editing gets an A+ from me as well.
SO... As always, thanks guys! It always makes my day to see that notification of a new video!! {8^)
You cannot stop Wood from moving. If you glued it, then the wood would move and something would have to give the word would crack or twist or break apart. Wood is unbelievably strong in moving so you just have to deal with it and allow the word to move you cannot stop it.
If you're building a bench top using construction southern yellow pine edge glued, is it better to use wider boards like 2x8s and have 5 boards across or 10 2x4s across?
I have plenty of wood that goes bad twists warped or whatever I slice them up into long thin pieces glue them back together kind of like cutting board style but longer boards, matching up strips to compensate for each other and then I end up getting really nice straight boards that I use for things like drawers. The variations create really cool effects
Great tip
Your thoughts on alternating the grain direction every other board in a glued top if a person cannot get quartersawn boards? Recommended by a few, but I am not sure if these are truly informed recommendations. Thank you for sharing your experience !
That was more applicable when housing was not so climate controlled. Wild temperature swings and consequently relative humidity swings. I don’t think I would ever have bought into the idea of ruining the grain continuity for the extra work and blah look of 2” wide strips. Better off seasoning the boards in the room where the piece will live , before you build.
Did you drawbore the p ins on the breadboard top.
Can you get Accoya in Canada?
It is a type of pine that has been processed using vinegar type chemicals. This changes the cell structure to stop it absorbing water. This means very little movement and rot. They guarantee it for 25 years buried in the ground….
They are building window frames with it in the UK. I built a conservatory extension with it
However, it’s no good for hand tool working - very splitty…..
I’ve never heard of it before
Thanks for the information! I’ve heard that when we’re making really small pieces, like a small ring box or something similar (a few inches by a few inches) that wood movement isn’t really a concern - is there any truth to that or should I still plan around it?
Thats basically true, there is wood movement but on very small pieces the movement is so small its negligible
I love woodworking and i am only 13
Keep watching rob and other great teachers to learn. You will enjoy the hobby much more if you learn from them. Have fun.
I’m 73 and I do too. I wish you lived in my neighborhood! Stay with it and it will pay you back in more ways than you might guess right now.
Hi Darrian....I was like you at 13. Keep watching my videos and you will learn a lot
You're gonna be a great woodworker with a head start like that!
When you do a table top they use the do them in strip, does that help with the twisting?
Not at all pure wives tale
Rob, Which "Hoadleys book on wood"? It seems Mr Hoadleys is a prolific author. I'm finding several different books penned by him. As always, Thanks for the video. I've discovered the pitfalls of re sawing, especially if it's a spendy piece of exotic wood. Having to buy it again to fix the results is a valuable lesson learned......
Understanding wood by hoadley
I use 5/4 quarter-sawn white oak for serving trays up to 24 x 24 inches. Resawing 5/4 down the middle to achieve two boards just less than 7/16 thickness for panel glue up. Even though the panel is housed in dados/grooves 2 inch tall sides (serving tray), I have still experienced instances of both the panel bowing and the occasional twist causing the sides to lift right off the surface. I guess Resawing is not recommending based on Rob’s suggestion for planing wood on both sides?
That’s correct. When you resolve would you release a lot of tension in the room wood. And that tension is what is causing the Bowing and twisting. As I stated you’d be better off taking the 7/16 out of the center of the board therefore you would evenly remove, would not causing as much change in the tension of the board.. if you must Risa, I would re-saw then let those boards sit in the acclimate for at least two weeks then you can to see whether they’re going to twister bow which they probably will and then you know not to use them
Thank you very much for the response! I was afraid that might be the answer, but that definitely helps! Trying to economically do this with 5/4, as I sell these trays. I love quartersawn white oak but it is obviously expensive. Can’t seem to find 1/2 inch quartersawn stock locally, so I will be investigating 1/2 1/4sawn white oak plywood next. Thanks again! Really appreciate it.
What width of board do you not need to worry about wood movement? Someone once told me 4" in width or less you don't have to worry.
All wood moves in width and thickness. The wider the board the more wood fibers there are so the more moisture it can soak up and thus the more it will move. The less wide the less it moves but it still moves. Now throw in the species of wood as they all move differently. Get Hoadleys book on wood and he has tables that will define exactly how much wood will move by species, size and relative humidity
Torrefied ? What kind sorcery is that! Man I want to make a table from wood like that :)
Would you say that torrified (?) wood isn't compatible with pva glue?
It is. We use it with PVA glue and it holds
40% Ouch! With all the waste from my newbie skills, furniture is looking cheaper at the fancy store 😁
But that fancy store the furniture is steel, made with pressboard wood bolts, and won’t last you nearly as long as a well made traditional piece of furniture
Please use metric sistem too!
You need to watch my video on imperial verses metric
Given you factor in 40% waste when buying lumber for a project, what have been some of your go-to scrap wood projects over the years?
Easy small wood boxes
That hair tho ❤
Me and Fabio
Wood movement is one of the reasons I don't really like working with wood. Not having the tools and time to mill rough lumber down and letting it sit to stabilize in a climate controlled environment is a big barrier to entry for me. I think I just like the idea of working with wood.
Someone tell me again why Rob is letting his hair grow long? Don't get me wrong, I have no issue with it, in fact he is one of those that can let it get long and it looks good. Just don't recall why he is going with the long flowing look. If I had to guess, I would say it has something to do with hockey.
Dear Rob as you seem to be going full hippie a beard cannot be far off. Go for it. I mean a big beard full on 18th century.
Beech moves a lot
Allwood moves some more than others
40% waste factor...oof.
Lets say you are making a larger furniture piece, like a long rectangular tv console out of solid wood; do you box joint the 4 ends to deal with wood movement? Or just say fuck it and do ply?