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2021-01-09

Making the binding and purfling of guitar (front)


20201219
Now to work on the front binding channel side.
I had to figure out how to hold the guitar this way.
So I added a wood tension and clamp down the guitar.
I also fixed the L wooden bracket with dowels.
Now I am ready for the front binding channel.
For this side I go by the hand binding route instead.
I find that it has more control.
Luckily for me I had my own binding cutter as well the LMI gramil.
I set mine as the top cutter and the gramil as the side cutter.
This time round I use my 2m chisel and shave down the sides as I scribed it.
This method works great but abeit slower.
My paring chisel with a square reference (not bevelled) works great in this case too.



Holding down the guitar using some wood spring tension


The butt L-bracket is reinforced with dowels.


Cutting the top part using my binding cutter.


Scraping the side part using LMI gramil


The cut line by the gramil


Chiseling the waste away


Test fitting the channel


Almost end in sight


20201226
Merry Xmas everyone.
Next I began to cut the purfling channels.
This is relatively easy as the cutter can easily scribe the spruce without any issue.
I only need to control the depth not to cut too deeply.
But even if cut all the way thru' it should not be an issue, as my linings are about 10mm wide more than enough to support the top.
To cut the purfling channels accurately, I use my router plane and set the depth and cut in 2 passes.

When the channel is ready, I began to glue the purfling after some test fitting.
For holding the purfling, tape is still the best medium as it can apply the force in a wide area (equals the width of the tape used) After some time the gluing is done.
I did a joint on the purfling, which looks very good.



Test fitting the binding


Close up of the binding channel


Scribing the purfling channel


Cutting the purfling channel using a router plane


Test fitting the purfling


Close up of the purfling channel


Close up of the purfling channel


Gluing the purfling using tape


Spreading the glue in the channel


All done.


Preparing the binding and cutting it to length


Check the fit


20210102
A Happy New Year to all!
I began gluing the front binding after checking all the fit.
I was contemplating whether to do both at the same time or one by one.
If doing one by one, the fitting at the butt end can be made to perfection.
But the rope pressure might damage the purfling.
If doing both at the same time, the fitting could be more tricky to handle.
In addition the rope tying sequence will be affected unless I started at the waist.
In the end I decide to go one by one.
Again by using just rope only I am able to see any gaps and close them before the glue dries.
If surrounded by tapes, I cant see anything...

The next day I did the other side repeating the same procedure.
The purfling was alright luckily.
Anyway the purlfing is a bit proud of the top surface so it can be sanded down easily.



Gluing the front binding.


Close up


Binding on the other side


Close up


20210109
Once the glue dried completely, I took off the ropes and began to scrape the binding flush with with sides and top.
There are some areas which I fill the gaps with saw dust and glue.
The effect came out very good.



After the rope removed


Scraping the sides


Waste from all the scraping..


End graft after sanding and scraping


Front view after sanding and scraping

2 comments:

David Negron said...

Re your binding cutter. What is it exactly and why not use the gramil? I’m trying to learn how to cut bibding/purfling with only hand tools. I appreciate your use of the router plane and blog in general.

Sen Goh said...

First of all it's good to have 2 binding cutter if you intend to do it by hand.
One to scribe the top and one to scribe the sides.
I have 2 cutter: one is home made one is from LMI gramil.

The gramil is well made but the only issue I have with it is that it is small.
There are some instance where I need to apply more strength to scribe the wood (back hardwood especially) and there isnt much place to hold for the 2nd hand at the gramil.
For my own cutter, I can easily hold it cutting arm and apply more strength.
Other than this, there isnt really much difference between the two.

Anyway my cutter was also made for cutting rosette channel too.