Woodworking question

[Greg Newell]

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Thanks Phil. I appreciate the story. Sounds like I have some work to do=20
making the adjusted radius on the caul piece. Should prove to be a good=20
lesson. I wasn't easy maneuvering a 6" x 12" x 48" stack through a 1/4"=20
bandsaw blade. I guess I get to try again (with one of the pieces anyway).

Greg


At 02:34 PM 6/2/2003, you wrote:

>Perhaps an example will answer your question.  I recently laminated a=20
>molding piece for an upright piano.  On this piano the transition from=20
>side to front was a curve (a portion of a circle).  A molding piece ran=20
>around the bottom of the case.  The portion in the curved area was=20
>missing.  I measured the thickness of the remaining molding and found it=20
>to be 1/2 inch.  I laid a piece of paper on the top edge of the case and=20
>traced the circle.  I then took a compass and adjusted its radius until it=
=20
>matched the tracing.  I drew the inner curve with this.  I laid the=20
>compass on a ruler and determined the radius.  I added 1/2 inch to this=20
>number (the thickness of my desired molding) and adjusted the compass to=20
>this figure with the ruler.  I then drew the outer curve with this.  One=20
>thing to keep in mind if you are using an inner and outer mold (as opposed=
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>to the flexible sacrificial piece suggested by Ron) is that the thickness=
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>of the laminate stackup has to be pretty close to the!
>  desired figure (in my case 1/2 inch)
>or you won't get good clampup.  So, in my case, if I were using 5
>laminations they would need to be pretty close to 1/10 inch each.  Much=20
>more or much less and I wouldn't get good clampup along the whole curve.
>
>Phil F
>
>At 11:01 AM 6/2/03 , you wrote:
> >Thank you Phil. I'll ask you the same question as I did Ron. How do you
> >figure the 2 separate radii?
> >Greg
> >
>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives

Greg Newell
Greg's piano Fort=E9
mailto:gnewell@ameritech.net=20

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