round side table

There should not be any springback if you use bending plywood over a form. I saw a bombe door made this way recently and it was spot on, so springback at all, even with the veneers glued on.

But I think Rembo coopered his doors, so springback is not going to happen here either, especially if he oriented his annual growth rings correctly. (It seems as if he laminated his aprons though.)

I made my curved doors a third way, which is with curved ribs done with a router template under a 1/8" plywood skin, with a veneer vacuum pressed on top. Also no springback.
 
In frame-and-panel construction with a flat panel, the largest wood movement is back and forth within the slots in the frame.  This does not create pressure against the lips of the slots, and wood movement against the lips is controlled by having thin panel edges and narrow slots.

Here, since the panels are curved, expansion and contraction of the panels creates pressure against the lips of the stiles (and also the rails).  The movement is not just in and out within the slots.

Do the lips and panel edges hold up well through seasonal expansion and contraction?
 
CDM said:
In frame-and-panel construction with a flat panel, the largest wood movement is back and forth within the slots in the frame.  This does not create pressure against the lips of the slots, and wood movement against the lips is controlled by having thin panel edges and narrow slots.

Here, since the panels are curved, expansion and contraction of the panels creates pressure against the lips of the stiles (and also the rails).  The movement is not just in and out within the slots.

Do the lips and panel edges hold up well through seasonal expansion and contraction?
Click to expand...

Are you sure these are frame and panel? They seem to me to have routed details on a solid door to simulate frame and panel.
 
Rembo, you're a scientist. So glad you decided to start posting here. Also interested in russian woodworking as a whole, it's not something we get to read about too much over here, people seem obsessed with American craftsman stuff, nothing wrong with it but we have an entire planet's history and experience in woodworking and before I'm dead I'd like to learn as much as possible.
Hats off to you sir, you've got us all thinking....which is great!
 
mattfc said:
Richard Leon said:
Are you sure these are frame and panel? They seem to me to have routed details on a solid door to simulate frame and panel.
Click to expand...

Pretty sure its stile/rail plus panel, looking at this picture
http://festoolownersgroup.com/member-projects/round-side-table/?action=dlattach;attach=45944;image

You can see the different grain direction
Click to expand...

Yes, now I see that from the photo. I was looking at one of the pictures which had coopered panels after a picture of the doors. I had assumed this was a before and after set of pictures. Maybe it was to help form the curves?
 
Richard Leon said:
Yes, now I see that from the photo. I was looking at one of the pictures which had coopered panels after a picture of the doors. I had assumed this was a before and after set of pictures. Maybe it was to help form the curves?
Click to expand...

Yes.. I think the rail is made of laminates.. if you look on the bottom right of this pic you can see the balck disk with holes in it, I pressume those are for putting clamps in to hold the rail to the former
http://festoolownersgroup.com/member-projects/round-side-table/?action=dlattach;attach=46070;image
 
GhostFist said:
Rembo, you're a scientist. So glad you decided to start posting here. Also interested in russian woodworking as a whole, it's not something we get to read about too much over here, people seem obsessed with American craftsman stuff, nothing wrong with it but we have an entire planet's history and experience in woodworking and before I'm dead I'd like to learn as much as possible.
Hats off to you sir, you've got us all thinking....which is great!
Click to expand...
Thank you!
but we die early, there is still the case!))
I can not until all tvetit, oznakamlivayus how it's done. the only thing I can comment on that door that I'm showing here are composed of separate piping and panels.
what I know and can try to show.
 
Thanks for sharing all your photos  [big grin]

Don't you think a bag press would be easier for some of your laminating ?

Woodguy.
 
woodguy7 said:
Thanks for sharing all your photos  [big grin]

Don't you think a bag press would be easier for some of your laminating ?

Woodguy.
Click to expand...
I prefer a method that works  [smile]
 
mattfc said:
Rembo said:
I prefer a method that works  [smile]
Click to expand...

I think a vacuum bag might be a good options for some of your gluing, or at least a compression strap.. in this post you can the see the faceted face due to the clamping, a former would prevent this. With a vacuum bag you can get pressure that is even, and up to about 8000kg per m2
http://festoolownersgroup.com/member-projects/round-side-table/msg186470/#msg186470
Click to expand...
Vacuum in the bag I can not control the pasting.
maybe I'm mistaken, we should try
 
Rembo said:
mattfc said:
Rembo said:
I prefer a method that works  [smile]
Click to expand...

I think a vacuum bag might be a good options for some of your gluing, or at least a compression strap.. in this post you can the see the faceted face due to the clamping, a former would prevent this. With a vacuum bag you can get pressure that is even, and up to about 8000kg per m2
http://festoolownersgroup.com/member-projects/round-side-table/msg186470/#msg186470
Click to expand...
Vacuum in the bag I can not control the pasting.
maybe I'm mistaken, we should try
Click to expand...
See this video to get an idea of what I mean by vacuum pressing laminates
Vacuum Press Bag Forming of Curved Wood and laminate
Sorry what do you mean by "pasting"?...
 
Your sawing, routing, and sanding jigs are impressive.  Now you need dust collection jigs to go with them.
 
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