Re-heading a framedrum...........................................
Cooperman 'Randy Crafton' Bendir.................................
(c)Paul Marshall 2004
In 2003 I purchased a beautiful bendir from my good friend
and fellow FDG contributor Bill Smith. It was one of my favourite drums to play.
Toward the end of the year, one of the sky-scraping stacks of drums in my studio
was toppled and the skin became ripped by something with a sharp edge falling
into it. I was a little upset.
In early 2004 I gained a contact who would be able to
supply me with an occasional Lambeg skin.
These skins are superb for framedrums because they
are scraped exceptionally thin, this also makes them ideal for bodhrans because of their flexibility and
pitch-bending capability under low tensions, but I digress. You can see the
macro image (right) of the skin showing its thinness, the ruler measurement is
in milimetres. I reckon this is 0.2mm.
The job
in hand was to re-head the bendir using the Lambeg skin. I have tried to take
photos at each critical step to help illustrate. If anything is unclear, please
e-mail me and I'll try to fill in the blanks.
What you
need.
- Cleaned drum shell
with all traces of the old head and any adhesive removed
- Goatskin
- Pencil /
Sharpie
- Scissors
- Bucket of
Water
- Strong string or
long hose clip
- Water-based
woodworkers glue & small paintbrush (or finger :)
First
thing is to lay the drum skin flat on the ground with the playing side face
down, Mark around the skin with your sharpie leaving 2" or so all around. This
provides a skirt that can be pulled upon to place the initial tension on the
drum. Cut around this line
.....
Take the
skin and soak it in a bucket of cold water, you may have to fold it, that's
fine. With a skin this thin it only needs 20 minutes or so to become soft and
pliable. If it gets mushy or starts to become 'fat' then it's overdone. If you
haven't yet had the pleasure of the smell of goat then you have a new experience
coming your way. If it stinks then chances are it's from a billy. Nannys make
the best drums I believe.
.....
When the
skin is ready, take it out and let the excess moisture drain back into the
bucket. Place the skin on an old towel (I keep one just for skins) roll it up
and wring it. This really sucks the excess moisture out of it and from this
point in you're on a clock as the skin will start to dry and harden.
For my
own skins, I then take the skin, roll it into a cylinder and stretch it as hard
as I can pull, I do this in all directions. This will help to break up the
fibres in the skin and will stop it from de-tuning so much when the skin is
fresh. You may be surprised at how much stretch is in the skin. You will not
break it unless you use some mechanical stretching device. You may or may not
choose to do this, it works for me.
Next step is to apply a layer of the glue to the shell
where you wish the skin to be attached, I have found that it takes more glue
than I would have thought prudent but make sure that it's not too thick and
oozy. With this drum there was a handy fixing groove routed in the shell and
this gave a natural boundary for the adhesive. You may wish to use some masking
or other lo-tack tape to give a neat line.
I couldn't find a paintbrush to use so I used my finger to
apply the glue, I'd not do this normally, but I was missing this in my
preparations, I was on a skin-drying clock and couldn't quickly source one.
After
application of the glue, I laid the damp skin flat on the towel again with the
playing side face down.
Place the drum shell on top of the skin and lift the edge
of the skin so that you can press it against the glue (see right). It should be
tacky and the skin should stick at least part of the way around. The dampness of
the skin re-activates any glue that will have dried slightly. You can now turn
the drum over (image left)
With this drum, the fixing groove, as designed, really
assists with the attachment of the skin and I only needed to use a piece of
string with a sliding knot to hold the skin in place. With the string tied, you
can start to pull the skin through the groove. You must ensure that the skin
remains centred and that you pull all wrinkles out of the skin.
With the skin in place and evened out, I attached a pen as
a tourniquet and proceeded to put in a half a dozen twists to place the drum
under tension. Because this is a framedrum intended to be played by fingers I
pulled the skin relatively taut. The drum skin will taughten naturally as it
dries and you need to have an idea of how tight to pull it when wet to achieve a
desired finished sound. I'm afraid this can only be achieved through you being
here or by doing it yourself.
Working my way around the drum, pulling on opposite sides
simultaneously, I gradually stepped up the pressure on the skin until I felt it
had reached the point where I wished for it to be.
When that is done, put it
somewhere that it can dry naturally, the moisture needs to evaporate as the skin
seeks to equalise with the moisture content of the air. Don't place it in front
of a heat source such as a radiator or fire as this can damage the skin.
Somewhere with good ventilation is preferred and keep it away from a pet dog who
will enjoy chewing the odorous new plaything.
Now
comes a big tip.
LEAVE IT
ALONE!!
Seriously.
Every
drum that I have skinned where I have tried to advance the progress by
continuing working on it before it has completed the drying stage has suffered
some sort of negative effect because of it. I am reminded of a chinese proverb
about a farmer who went out into his fields and uprooted all his crop to see if
it was growing. By all means tap the head and check the pitch, check for touch
dryness but do not play it at full tilt and do not attempt to trim the edge of
the skin until the 'skirt' becomes rock hard. If the drum is tunable do not try
and bring it to playing pitch. The bit of skin below the string that you can't
see will remain damp for longer than the rest of the skin plus the shell will
maintain some of the moisture inside after the skin is touch dry. It is still
vulnerable to being moved, ripped or otherwise affected. I'd advise waiting 24
hrs before carrying out the next step.
The
Next Day...
Using a
sharp hobby knife trim the excess skirt of skin off the drum. As with any sharp
tool, let common sense prevail. Think twice before you cut once. A framedrum can
survive a slice normally because of lowish tension but it may deteriorate when
playing or may simply be unsightly. In any case, you didn't go to all this
trouble just to undo all your hard work.
In the
case of this drum, that cutting is made straightforward because there is a
routed groove and the string provides a natural smooth edge against which to run
the knife. I should get a neat job.
In the
case of a drum which doesn't have any natural cutting edge, I'm afraid that
you'll need a steady hand. I have had mixed success with placing something under
the skirt of skin and in being able to slice through the small collar of skin
'ramped' between the lower and higher levels. For pure aesthetics, I'd avoid
cutting directly into the drumshell if possible unless you are confident that
you'll leave a straight enough line for you to use again.
When the
skin is trimmed, that's it, the drum is ready. It will decrease in pitch
slightly initially as the skin relaxes into its new position but will soon
settle.
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