spirals for a collapsible basket

[tracyguy]

Hi there Does anyone know how to draw the spirals for a collapsible bowl. I cant work out how the spirals get closer to the middle you go.

Thanks for your help

Martin

[Rob]

I have never made a spiral bowl but Inkscape has a spiral tool.  When you draw the spiral you can click on the node at the outer edge of the spiral and drag it round in a circle to extend the spiral.

 

Hope that makes sense and is helpful,

 

Rob

[Debi Shipman]

Steve Good has one maybe you can take a look at it and get an idea of how it's done.

 

http://scrollsawworkshop.blogspot.com/2008/01/collapsible-basket-pattern-and-video.html

[woodchux]

IMO, some factors to consider when making a spiral bowl before cutting;  - a pattern, 3/4" hardwood, a #9 scrollsaw blade, and bevel of the table. Two of those items will determine how deep the basket will fold out - blade thickness (which produces a deeper basket) & bevel of the table when cutting (4 degree rather than 5 degree) also makes a deeper basket. Consider practicing on an inexpensive grade of wood by starting at the inner most point of the basket base, working your way around to the outer spiral edge. Sand away any rough edges to make the basket open/close easily. Take your time, & be safe.

[amazingkevin]

Thanks for the info,i need to get cranking out some money projects!

 

Hi there Does anyone know how to draw the spirals for a collapsible bowl. I cant work out how the spirals get closer to the middle you go.

Thanks for your help

Martin

 

 

I have never made a spiral bowl but Inkscape has a spiral tool.  When you draw the spiral you can click on the node at the outer edge of the spiral and drag it round in a circle to extend the spiral.

 

Hope that makes sense and is helpful,

 

Rob

 

 

Steve Good has one maybe you can take a look at it and get an idea of how it's done.

 

http://scrollsawworkshop.blogspot.com/2008/01/collapsible-basket-pattern-and-video.html

 

 

IMO, some factors to consider when making a spiral bowl before cutting;  - a pattern, 3/4" hardwood, a #9 scrollsaw blade, and bevel of the table. Two of those items will determine how deep the basket will fold out - blade thickness (which produces a deeper basket) & bevel of the table when cutting (4 degree rather than 5 degree) also makes a deeper basket. Consider practicing on an inexpensive grade of wood by starting at the inner most point of the basket base, working your way around to the outer spiral edge. Sand away any rough edges to make the basket open/close easily. Take your time, & be safe.

[WayneMahler]

I have been thinking about this most of the night. I would think laying out the rings in an order at the proper measurement should work. Seems to involve a lot a of math thought. Something when I get caught up that would be interesting to play  with.

[Lucky2]

Martin, drawing the spirals is the easiest part of the project, anyone can do it. The hard part of the project, is figuring the angle of the cut. It takes some trial and error work, to figure the angle of cut out. The best way to figure it out, is to get a piece of junk wood and practice. Apply your spiral pattern to the wood, and get to cutting it out. It will take a few pieces of scrap wood to practice with, and you should use some different thicknesses. Start with 4* and go on from there, eventually, you'll find the angle that works for you. There are books out there on this subject, they have all the patterns and angles figured out. It might be cheaper to buy a book, rather then waste time and money on practicing and getting frustrated with the results. There's a good book with this type of pattern in it, it's patterns drawn by Rick and Karen Longabough. It's called Collapsable Basket Patterns, and it has over a hundred different patterns in it. They are of all different shapes and sizes, and you even get info with each pattern of what angle and blade to use. I don't think you would regret buying the book, especially, if you're into this kind of cutting.

Len