Minimizing waste in a 4x8 sheet?

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Minimizing waste in a 4x8 sheet?

Postby Dean in Ct. » Tue Jan 17, 2012 7:13 pm

I'm working on profile ideas for a modified generic Benroy, from the above listed plans.
It seems to me that if I cut the 4' rear radius I create a lot of "scrap". It looks to me like if I rip a 1' strip (tangent to the curve) and apply that to the fwd upper 19" radius I can move the center of that 19" radius forward a fair amount. Then if I take the last piece which was the original corner of the sheet and bring it to the forward lower corner I can move that corner forward a bit also And add a small, say 10" radius there.
Has anyone done this and what are the actual measurements? I took a piece of Luan and cut it to 8"x16" and played. Unfortunately at that scale the table saw kerf works out to about 1 1/2"-2". I'll try to post a pic of my model because I fear my description may not be very clear. It looks to me like one can gain about 2 square feet of surface which is either 8 or 10 cubic feet. I plan mine to be 5" wide. I think a bunch of shelves or cabinets in the forward wall would be a good storage space for all manner of soft stuff.
Who's done it and how do the actual #'s work out?
Thanks!
Dean
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Postby tamnalan » Tue Jan 17, 2012 9:27 pm

The cutting stock problem is a classic in operations research circles. Yours is harder though because the curves mean that we must solve a nonlinear optimization problem, which is computationally harder.

The quick answer though - will the ply's visible grain still line up? This might be a problem if you care about that. Otherwise it seems like an efficient idea. I did find a lot of uses for those corner pieces though. I ended up with very little waste and most of that went into my woodstove to help keep me warm.
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Postby Dean in Ct. » Tue Jan 17, 2012 9:36 pm

I'm not worried about grain, I figure I can come up with some creative paint job if I do use plywood. I just wish somebody already had done the numbers!
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Postby bobhenry » Wed Jan 18, 2012 7:11 am

Simply don't use the 4 ' radius!

Drag out the scale and a compass and draw partial
circles until you arrive at what YOU want.

Pick the point you want to start and stop your
profile cut , then reverse engineer with a very
large compass made from a ripping a nail and
a pencil. Make an arc from both points and the
intersection becomes the pivot point. I know
clear as mud here is my idea with Andrew' help,
in print.

http://www.tnttt.com/viewtopic.php?t=13925&start=0

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I used a 10' plus radius on Chubby's rear galley and then used a front scrap as a guide to bob his tail to eliminate the pointy tale.
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Postby bobhenry » Wed Jan 18, 2012 7:36 am

just tripped over this ......

http://www.tnttt.com/viewtopic.php?t=43208
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Postby bobhenry » Wed Jan 18, 2012 7:51 am

Here is a modified Benroy with very minimal waste of materials.

I went over to help my friend Billy with this one early on. He was a quick learner it turned out beautiful!

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Postby del690 » Sat Feb 04, 2012 8:19 am

Those doors look sweet. I know they are expensive but ultimately may be the way to go.
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Postby DogStar » Mon Feb 06, 2012 4:32 pm

Do you have a resource for those doors?
Thanks,
Eric


[quote="bobhenry"]Here is a modified Benroy with very minimal waste of materials.

I went over to help my friend Billy with this one early on. He was a quick learner it turned out beautiful!

Image
Always with my thanks,
Eric

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Postby absolutsnwbrdr » Mon Feb 06, 2012 4:54 pm

DogStar wrote:Do you have a resource for those doors?
Thanks,
Eric


Vintage Technologies

:thumbsup:
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Postby DogStar » Mon Feb 06, 2012 4:59 pm

So cool, thanks!
Another resource bookmarked

I'm wanting some big doors with windows.
Eric


absolutsnwbrdr wrote:
Vintage Technologies

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