a question this might seem like a dumb question after you drill the holes in the round work piece then glue in the round plugs after you re-turn or sand the round piece smooth will the plugs still look round or will the be slightly oval
Bill ----- Original Message ----- From: [email protected] To: [email protected] Sent: Friday, January 21, 2011 9:13 AM Subject: Re: spiral cuts control Hi Curt I have been thinking about some spiral designs on a cylinder. I have attached two diagrams showing a design on the cylinder as well as the design on a circular platter using the rotary table. On the cylinder I was thinking of using a Forstner bit in the router with the speed reduced. The bit's center positions would be obtained as outline in my previous messages. The Forstner bit will give provide a flat bottom hole. There will be a small hole at the center due to the centering screw. A disk whose diameter is the same as the Forstner bit will be glued into the hole. These disks could be made on the Legacy from a column whose diameter is the same as the hole. I would mill the column close to the diameter but test fit as I go to insure a tight fit. Now the disks can be made by slicing off the required thickness so that when inserted into the hole they stand a little proud of the column surface. This is because one has to sand the column bringing the disk level to the surface with the correct curvature. When one applies the glue to the hole make sure there is some along the sides and the center hole is filled. After a period of take off the glue squeeze out when in a gummy state. I would use some blue painters tape strap across each glued in disk to provide clamping pressure. I would make the disks of a contrasting color to make the design pop. Like for a maple cylinder red heart, purple heart or black walnut would stand out. In the drawing I show one of the disks as a ring as an example of design variation. This could be made by applying the same technique in a second pass. That is with the same bit positions and using a smaller Forstner bit drill a hole in the center of the glued in disks. Now glue in maple or another color in the smaller holes. In the diagram I also show banding along a spiral line on each side the disks spirals. These are cut using straight flute bits. The banding is made of a contrasting wood and glued in the groove. I can imagine a lot of design variations. One could incorporate different colored wood buttons that stand proud of the surface. On the use of hole saws I would infill the grooves using crushed color stone. I think some else had made that suggestion as well. The second diagram shows the same design on a wooden platter using the rotary table. The example has the disks every 45 degrees. The rotary table rotates 45 degrees for each revolution of the head stock shaft or a 8 to 1 ratio. Using a hole template with 9 equally space holes will provide 5 degree rotation of the rotary table for each hole traversed. This will provide angles which multiples of 5 degrees i.e. 5,10,20,25,30,35,40,45,50,55,60 etc. The same techniques used on the cylinder can be used here. In addition would could make up a sandwich blank for the platter . I would glue a piece of contrasting wood between two pieces of the platter stock. The thickness of the top piece of the platter stock should be equal to the depth one will drill with the hole saw. This provides the contrast for the rings generated. Also any banding grooves cut will be high lighted. Instead of a single piece of wood for contrast one could glue up different colored radial pieces. Then the ring grooves will show different colors as one proceeds around the platter. I can think of other variations but I have been rambling enough. Let me what you think. Ron -- You received this message because you are subscribed to the Google Groups "Legacy Ornamental Mills" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/legacy-ornamental-mills?hl=en. -- You received this message because you are subscribed to the Google Groups "Legacy Ornamental Mills" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/legacy-ornamental-mills?hl=en.
