Mujitsu and Tairaku's Shakuhachi BBQ

World Shakuhachi Discussion / Go to Live Shakuhachi Chat

You are not logged in.


Tube of delight!

#1 2009-09-13 17:38:42

Rob Bondy
Member
Registered: 2009-08-30
Posts: 52
Website

1st (and 2nd) PVC Shakuhachi

My first attempt(s) at making a PVC shakuhachi are done.  Follow the link below to see my video review.

http://www.youtube.com/watch?v=P0xUTXP5ch8

1A was done following the instructions on Kinya Sogawa’s website.

http://www.fides.dti.ne.jp/~sogawa/englishpagepvc.html

1B was done using Perry’s instructions from this forum.

http://shakuhachiforum.com/viewtopic.php?id=3500

However, I also studied Molado’s video a fair bit before starting, so I am sure there was in influence in construction technique.

http://www.youtube.com/watch?v=KRkoKrCLJCY

Things I would like to improve on:

-Utaguchi construction (practice practice)
-alignment of the holes (more precisely in line)

Things I want to introduce:

-a box or work stand to hold the shakuhachi
-wooden wedges that would serve as a rest/guide on a belt sander so that I could us it to get the angle I want for the Utaguchi. (and to slope back the part that rests on the chin)


"Every day is a good day" -Ummon

Offline

 

#2 2009-09-13 18:09:11

edosan
Edomologist
From: Salt Lake City
Registered: 2005-10-09
Posts: 2185

Re: 1st (and 2nd) PVC Shakuhachi

Rob Bondy wrote:

Things I want to introduce:

-a box or work stand to hold the shakuhachi
-wooden wedges that would serve as a rest/guide on a belt sander so that I could us it to get the angle I want for the Utaguchi. (and to slope back the part that rests on the chin)

This may be of some use to you (note that this is on a long flute, and that the backcut angle (for chinrest) is more than for, say, a 1.8; in my experience an utaguchi angle from 30 to 35 degrees works well for 'modern' flutes):

        http://img121.imageshack.us/img121/25/utaguage4if.jpg

This image will print at 5 x 5 inches at fair resolution (96ppi), so it could be printed, enlarged if desired, and cut out and glued to a thin piece of wood or cardboard to use as a guage to get in the ballpark (after all, this is not quite rocket science, but mostly ballpark...).


Zen is not easy.
It takes effort to attain nothingness.
And then what do you have?
Bupkes.

Offline

 

#3 2009-09-13 19:48:36

Rob Bondy
Member
Registered: 2009-08-30
Posts: 52
Website

Re: 1st (and 2nd) PVC Shakuhachi

Thank you Edosan.


"Every day is a good day" -Ummon

Offline

 

#4 2009-09-13 21:34:37

edosan
Edomologist
From: Salt Lake City
Registered: 2005-10-09
Posts: 2185

Re: 1st (and 2nd) PVC Shakuhachi

Rob Bondy wrote:

Thank you Edosan.

Nicely done video, Rob.

Here are some tips on drawing straight lines and getting holes where you want them. This stuff works best on PVC (smooth) tubes, but I've also used the methods on bamboo:

It's quite possible to draw a pretty straight line down the PVC: First, ascertain the center of the tube relative to your utaguchi bevel, mark it, then put one end of the tube against your stomach, and hold the other end with your non-drawing hand (I'm left handed, so reverse this if necessary). Hold the pencil like this (observe finger placement carefully, it's important):

       http://img188.imageshack.us/img188/9039/1strtline02.jpg

The idea is to stack you fingers together against the tube to form a solid foundation/guide for the pencil. Don't grip the thing too tightly, just make everything come together and stay there. Line up with your utaguchi center mark, and lightly make the line, not too fast, almost to the end at your body. NOTE: place the tube against your body off to the side toward your drawing hand, so your hand doesn't hit your body as it comes in. Piece of cake (especially if you've done it for about 30 years...). This is an exercise in paying attention.

Now you'll want to locate a point just opposite your line for the fifth hole. Fold a piece of printer paper in half, short edge to short edge to make a nice sharp straight edge at the fold. Trim of the sheet so you have a 1 1/2-2 inch wide strip. Wrap the piece around the tube so that it overlaps with itself, and make a mark just at the overlap, like this:

       http://img188.imageshack.us/img188/8564/2wrapmark01.jpg

Now find the center point between your mark and the end of the strip by either measuring it, or folding the end to the mark and creasing the strip to mark the center:

       http://img188.imageshack.us/img188/5995/3cntrmark01.jpg

Finally, wrap the strip around the tube so your first mark is aligned with the front line, and then mark the center on the back using the center mark on the strip. Now make another short straight line on the tube in the vicinity of the fifth hole location on the back.

       http://img188.imageshack.us/img188/5334/4oppmark01.jpg


Zen is not easy.
It takes effort to attain nothingness.
And then what do you have?
Bupkes.

Offline

 

#5 2009-09-15 10:42:53

jaybeemusic
Member
From: Moncton, New Brunswick, Canada
Registered: 2006-06-22
Posts: 145

Re: 1st (and 2nd) PVC Shakuhachi

When i'm trying to get a straight line, i take a piece of angle bracket.....(or wooden corner moulding) and take just the tube....no utaguchi attached and lay the pipe in the angle bracket like this....

http://i302.photobucket.com/albums/nn81/jaybeemusic/AngleBracketShakuhachi.jpg

and then just a quick line with a pencil gets you a perfectly straight line.   Then i  can easily align the utaguchi with that line and know that all of my holes will be perfect. 

and as far as the utaguchi...i make it BEFORE i put it on the tube...  that way i know it's perfect, before i even use it....
kinda like it's shown on here...

http://www.navaching.com/shaku/pvc.html

Hope that helps....

jacques

Last edited by jaybeemusic (2009-09-15 11:06:49)


It's better to keep your mouth closed and let people "think" that you're stupid, than to open it, and remove all doubt.

Offline

 

#6 2009-09-15 12:06:45

Taldaran
Member
From: Everett, Washington-USA
Registered: 2009-01-13
Posts: 232

Re: 1st (and 2nd) PVC Shakuhachi

I use narrow blue painter's masking tape. Works great for bamboo that is very curved. Just eyeball the strip of tape down the length from the utaguchi, tag it to the nodes, adjust it press it down when you are satified, and then measure and mark the holes. Just drill right through the tape. It leaves no residue.

Also to mark the thumb hole placement (as was covered above), make your measurement on the top dead center, and take a piece of tape and circle all the way around from your top mark. Cut or mark your tape where the ends come together to give your circumference, pull the tape off and fold the tape non sticky side in half and mark it. Then put it back on the bamboo, and drill on your mark. You don’t need to make any measurements for quick perfect placement.

Last edited by Taldaran (2009-09-15 12:13:06)


Christopher

“Whoever can see through all fear will always be safe.” Tao Te Ching

Offline

 

#7 2009-09-15 16:28:05

Rob Bondy
Member
Registered: 2009-08-30
Posts: 52
Website

Re: 1st (and 2nd) PVC Shakuhachi

Thanks for the replies guys.  I particularly like the bracket idea for drawing the line.  Simple and brilliant.


"Every day is a good day" -Ummon

Offline

 

Board footer

Powered by PunBB
© Copyright 2002–2005 Rickard Andersson

Google