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Showing posts with label Marquetry. Show all posts
Showing posts with label Marquetry. Show all posts

2012-08-07

Making the rosette

Well I began to make the rosette of the #4.
It's roughly based on the FE17, not a replica but largely based on that.
Here I am doing the chess board tile in the central theme.
I will also the doing the herringbone wheat pattern surrounding the central theme.



The FE17 rosette. This is the actual Torres' FE17; the first Torres guitar that Francisco Tárrega used. It was originally Torres' own guitar but Tárrega persuaded Torres to sell him this FE17.


First of all I need to cut the veneer sheet.
Well I use my proven method to cut which was fast and quiet.
I clamp the rule on the veneer and then scribe using my purfling cutter.
After that I cut the veneer into size clamp in alternate layers of blue and white.
To get the thickness I use 2 veneers for each layer.
I intend to do a 5x5 matrix so I need to glue up 6 layers.
When I slice it into tiles I can alternate the layers to form the matrix theme.



Slice up the veneer

The veneer all done

Cut into 6 equal pieces



Layer the strips and measure the thickness

Clamp the strips after gluing.
The tiles block was done quite OK.
I just plane the sides flat and saw away the ends on a miter box.
When I began to saw the individual tiles slices for gluing into the matrix, it didn't work out too good.
The slice thickness was not very even.
I probably need to do something to improve the accuracy...



Shooting the sides of the block


A thin slice of the strip


Sawing the slices in a miter box


The 2 slices in alternate layout. As you can see the thickness is not even.

By adjusting the width and changing to the rip teeth of the ryoba, I am able to get a more unform slice.
However the slice is still too thick and doesn't seem to form the matrix too well...
Time for more narrow adjustment.



6x6 tiles but it look too fat.


Or 6x4 matrix but doesn't look very nice to me...

Meanwhile I began to smoothen out the top using my wooden plane.
It's been a while since I use the plane but after some tuning, it shaved the top like nothing.
The top originally was in a raw state where I can see the fibers.
At first I had no success in removing those fibers except by sanding.
But by sanding I am not able to bring out the beautiful silking in the top.
Only when I use the plane to plane the top the beautiful silking appears!



Planing the top


Beautiful silking in the top after planing. Now it will be ready for rosette inlay.

I adjusted the thickness of the slice by loosening the clamp and give the block a slight tap.
Then I began to slice the tile and the thickness is just right.
But because there isn't support on the tile below, it started to de-laminate due to the sawing stress on the layers.
So I put a piece of wood beneath to support the tiles while I slice up the layers.
It worked and I was able to get 6 good slices to glue up.
I glued up the layers after making sure the orientation is correct and clamp the tiles.



Dry fitting of the slice. Now the effect is better.


Preparing to glue the slices


Glued and clamped

After looking thru' the photo closely, I just realise I can't count...
This is not a 6x6 matrix... It's 10x6 (white and blue) or 5x3(blue only) haha
No wonder it look funny; Nothing like the original which is 8x8 or 4x4(blue only)



The rosette tile glued. Now to cut them into slices. This is a short tile so I think I can get 4 pieces out of it. I probably need another block to do the rosette


It's a been a long breaks since I work on #4's rosette.
Well, finally I found the time to continue making it.
Here is the 2nd layer of the lozenges (king of big but still looks quite OK).
I also began to work on the outer wheat motif purfling.
The Angle will be 30 degree to facilitate easier sawing with the miter box.



The lozenges layer.


Wheat motif purlfing


Another option for the purfling. Which looks nicer?


I started to glued the purfling block and decide with the 1st scheme.
The procedure is same with the way I do with the rosette block.



Apply the glue.


Clamped.


The making of the wheat motif purfling is going well.
After the block has dried, I plane level the 2 sides and saw off the ends in the miter box that I have made.
The angle is 30 degrees.
Then I clamp the stopper block to predetermine the thickness of each tile and started to saw the tiles.
The line is skewed vertically but it's ok the effect isn't too visible in the final product.
This just shows my jig making has yet to reach the precision that I would like to have.
After the tiles are sawn I dry assembled the purfling and it sure looks good.
The width of the purlfing is about 4mm.
Now to consider how to assemble them.
Basically I have 2 options to glue and assemble straight into the top or to preassembled and then inlay into the top.
For the 1st option my channel must be very precise.
If not gaps will occur again.
I got the next few days to think about before I continue.
Meanwhile I just saw enough tiles to make 2 purfling one outer one inner for the rosette.
For the top and back and side purlfing I better think of a better way to make this faster and less painful.



Level the 2 sides of the block


Trim the ends to 30 degrees in the miter box


The miter box set up for slicing the tile.


One slice sawn.


The wheat motif purfling.

2012-05-21

Making marquetry

Well I thought of doing some marquetry tiles for the rosette.
I have always wanted to try to make some.
The first I have in mind is a diamond surrounded by a rectangle border.
This kind of pattern was used by Torres, Romanillos and other luthiers.
The steps on one to make the pattern was described in Romanillos' book on Torres; making the lozenges pattern purfling.
However, I am not going to make the small sized fine pattern as it requires the use of table saw or band saw to saw thru' a continuous long wood block.
Instead I am going make the size of the diamond about 3mm big as dictated by the thickness of my headplate :)
My steps are as follows:
1) Sandwich the central diamond piece by 2 surrounding piece. Make sure they are all of the same thickness.
2) Plane away the protruding part from the assembly when the glue has dried
3) Glue 2 more piece substantially wider than the central diamond above and below it.
4) Plane the overall assembly in an diagonal way such that the central square is now orientated in a diamond
5) Slice the assembly in to tiles the cross-section shape should show the diamond

Sandwich the central piece with 2 sides.
After the protruding central piece is planed flushed with the 2 sides, glue 2 pieces 1 on top and 1 below.
Shows the x-section of the assembly
Start planing the border
The final diamond or lozenges tile.
The white diamond too :)

2011-02-23

Making the Meander Tiles

Some updates: My workshop apartment is undergoing some major upgrade, (changing of all the sewage pipes, water pipes etc...
So unfortunately, I won't be able to work on my guitar for a few months :(
Hope to work my guitar soon.

I wanted to have a thick back strip for the guitar, and also possibly decorate the head-plate too.
So I thought of making a meander tile for it.
I originally thinking of a more complicated 2 fold meander pattern but settled for just one fold.

I started with the paper and calculated the width of each of the piece on the paper.
The centre strip was 15mm wide, and each piece thickness was 3mm.
So I add according and came out with a list of the width to cut.

I use Basswood for the white part and Indian Rosewood (double length head-plate) for the dark part.
To cut the strips from the head-plate I use my purfling cutter tool and it works like a charm.
I measure the width from the caliper (with some allowance) and set the tool width according.

Then when I cut the strips I just need to make sure the IRW / basswood edge is straight (by shooting on the shooting board) and then exert a constant pressure on the edge while i glide the purfling cutter on the head-plate.
I score on one side first and then flip on the reverse side and continue until it cuts completely.
Then I shoot both pieces to get a straight edge.
The main piece has to be shot to be straightened too, for the next cut.

Here are the pics:

Planning for the Meander pattern.
Nearly did a width calculation mistake for one of the piece (less 3mm)


A clearer picture of the design.
All dimensions in mm.

Measure the width setting on my purfling cutter.

Shooting to straighten the edge.

Cut the strips from the head-plate.

Dry assembly looks good.




The gluing part needs lots of clamp and clips.
Luckily I have lots of clamps around.
I use normal PVA white glue for the job because of the open time.
Anyway it dries clear and it's not structurally crucial, so PVA glue will suffice.

Gluing the 1st strip

Simple just use the clips

After some pieces. The meander is taking shape

More clamps are employed as the meander tiles gets thicker

S-shape formed

More clamping

Amost done.

Tada... Completed



Next to come is to cut up the tiles.
So in order to cut properly I made a miter box to be used with my douzuki saw.

Miter box for cutting up the tiles

Another view

Using the miter box.
The right block is thicker than the left.
It's meant as a stop to control the thickness of the tile slice.

Sawing the tile

The full view of the set-up.

The 1st tile sawn. So far so far

The pattern forming up.

My meander back strip (dry assembly).
The 2 white lines are for the look and feel.
The actual one will be thinner.

After a number of tiles sawn.
You can see the dust piling up.


My collection of tiles ready for installation. 
Should be able to inlay on 2 or 3 backs.