Help with cutting a laminated board

Kim Cant

PRO Member
I am new to segmented turning and am in the process of making my first feature ring bowl. I am a little confused about cutting the laminated board. I am making a feature ring with eight chevrons and have created the laminated board with the chevron pattern. Do I now cut through the board at the mitre angle, or is it better to cut through each segment at right angles and then cut the mitre angle on each segment (i.e. on the table saw or disc sander)? If I cut the angle straight from the board, is there an allowance for the saw kerf in lamination pro? I am concerned that each cut will shorten the SEL of each segment, and the next joint will move up the next chevron. Allen
 

mfisher

Super Moderator
Staff member
- imo, if you have one continues board glued up with the chevron pattern you would want to cut off the ears on both sides. Then cut through at right angles to make your segment. then you would cut the miter angle. To accommodate the loss of wood by the saw kerf in when designing your laminate make the repeating unit 1/8th (assuming that is your blade with) larger than the SEL. If you need a 2" repeating pair make cut them 2 1/8.

- I tend to make the laminate board. Cut the board to make the repeating pairs. Then glue up the pairs so I end up with my segment blocks (exampel I need 12 segments so I end up with 12 blocks after glue up. these blocks have the ends (ears) cut off and squared up. then I cut the miter needed for the segments to make a ring. Attached is an example of how I cut them. This method you don't have to worry about loss of wood from the saw kerf.

Have fun making your bowl.
 

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Lloyd Johnson

Administrator
Staff member
Allen,

My rule of thumb is that if I’m going to make another generation, I glue the repeating units into a board. But if I’m making the final generation, I only glue two strips into a repeating unit (this is always the case with chevrons because they are always 1st generation boards.

There isn’t much reason to glue chevrons into a board because the next step would be to cut the board into repeating units as Mike has said.

Lloyd
 

Kim Cant

PRO Member
Lloyd
Thank you for this. I have followed yous and Mikes advice and my first chevron bowl is nearly finished.

Allen
 
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