I guess I missed the contest ……… by a few months …….. :-)
Well all the colour decisions have been made and the flowers are glued in. The next job is to build a jewellery box to glue them onto. I have decided on Baltic Birch plywood for the carcase because it is very important that the top and bottom do not warp. With no ends on the carcase itself the outer reaches of both are supported only on the back and inner edges.The bottom, back, and top are dovetailed and the dividers are in dados. I veneered both sides of the bottom and dividers but won’t do the inside of the top until I can apply the top marquetry at the same time. The veneer is Walnut and , like the drawers, will be ebonized.
The drawers are solid Walnut with three corners dovetailed and the fourth attached to the hinge barrel.
In the first photo above and in the next one I am using a sawing jig that I made from David Barron’s design.
In the article I used he suggested 7/8" magnets and I made the mistake of reading “Rare Earth” between the lines. The jig didn’t work as well for me as I had hoped, partly because the magnets were WAY too strong and partly because my somewhat arthritic thumbs are not. In the subsequent photos below I have switched to the Veritas jig which works exactly the same except that the magnets aren’t as strong and the screw clamp does the holding. My dovetails are better and my thumbs are much happier.
The hinge pins must be a very close tolerance to keep the drawers from drooping when open and resting on each other when closed. I know lots of people work with precision measuring tools and many are better turners than I am but I have always been a “measure from the work” kind of guy so this is how I achieved the necessary close tolerance. (The wood is Queen Ebony and I’m not expecting it to swell up at all.)
I cut a square of 3/4" plywood and drilled a 1/8" hole in the middle.
Then I made a 1/2" hole half way through centering on the 1/8" hole.
I roughed out a shaft and turned one end to 1/2", gauged with a 1/2" wrench, cut off the oversize end …
…. and fitted it in the block, now mounted on the live center. This allowed me to fit a cut off segment of one of my actual hinge barrels onto the shaft and move it along as I reduced the shaft.
Doing it this way I was able to remove the dowel from the lathe and check for fit in the actual barrels and still return it to the lathe if it was too tight.
When I was satisfied, I applied a little wax.
Here’s a rough assembly. It still knocks apart and that’s a good thing because it has to travel to Az. at the end of the week. There is minimal play in the hinges and no noticeable droop despite the appearance in the last photo. The apparent droop there is “wide angle droop”. It corresponds to the apparent arc in the perfectly flat top. :-)
That’s all for now. My next entry will be from sunny Az. where I will be getting on with the rest of the marquetry.
Thanks for looking in.
-- The early bird gets the worm but its the second mouse that gets the cheese.