Official Luthiers Forum!
http://www.luthiersforum.com/forum/

Profile your sides: before/after bending. Which way and why?
http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=44205		 Page 1 of 1
Author:  Steve Jeffries [ Mon Sep 22, 2014 7:44 pm ]
Post subject:  Profile your sides: before/after bending. Which way and why?
Just wanted to get a general idea of how you personally prefer to do it, and your reasoning behind it...
Author:  uvh sam [ Mon Sep 22, 2014 7:49 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Before and after. Before, to a rough template so final profiling with a radius dish, after, is quicker
Author:  Michaeldc [ Mon Sep 22, 2014 8:09 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
+1 for uvh sam..
Author:  Terence Kennedy [ Mon Sep 22, 2014 9:34 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Me too.
Author:  johnparchem [ Mon Sep 22, 2014 10:42 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Close before, fine tune after. It is a lot easier to cut a flat board than a bent side.
Author:  jac68984 [ Mon Sep 22, 2014 11:18 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
I prefer to bend sides at a uniform width, which is typically just a bit wider than the final dimension at the tail. Once the tail and head blocks are in, a small block plane quickly gets things close enough to move to a dish.
Author:  doncaparker [ Tue Sep 23, 2014 12:08 am ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
I've done it both ways. I currently like roughly profiling while flat, then bending and gluing, then later getting things perfect with a dished sander. I have more useful leftovers this way. You have to pay more attention during bending, though. Having two left sides is no big deal if the wood stays a uniform width, but it is a replacement level mistake with pre-profiled sides.
Author:  meddlingfool [ Tue Sep 23, 2014 12:24 am ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Two steps as well. Before the bend, then final with radius dish. This way, you can nearly always take a set of bindings off the sides. Our general practice is to rip the bindings, profile the sides, then put the bindings back on near where they came from for a beautiful color match...Image
Author:  meddlingfool [ Tue Sep 23, 2014 12:27 am ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Image
Author:  Bri [ Tue Sep 23, 2014 12:56 am ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
doncaparker wrote:
but it is a replacement level mistake with pre-profiled sides.


This is very true, but, you will only do it once. I hope.(doh!)

Everyone finds what works best for them. Me I hate sanding, so i get the sides close and then place the sides on a radius dish, scribe and plane as necessary. I also do the braces this way.
Author:  bluescreek [ Tue Sep 23, 2014 5:52 am ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
I do profile before before bending as it saves a lot of work . Bending a 5 in wide pieces makes for a lot of work to taper and radius the sides. On Classicals I don't think it would matter that much as they don't have the same amount of taper as a steel string.
Author:  mkellyvrod [ Tue Sep 23, 2014 7:13 am ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
I've only done classicals thus far, and do it as Aaron has described. Cut the sides to the dimension of the tail (tad higher), bend, and then plane a slight taper on the back of the sides down to the head block, once the sides are glued to the top. Very little sanding needed.
Author:  Michael Lloyd [ Tue Sep 23, 2014 1:44 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
I also do it as Aaron and Martin have described with the profile drawn on the sides before bending. A small block plane makes for short work. Though I must say I have been tempted many times to cut first but always seem to go the safe route. :)
Author:  Nils [ Wed Sep 24, 2014 7:43 am ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
I cut my sides to be as tall as the end block. I then bend. Then I profile them with a plane, and finish up with a radius sanding board. No real profiling prior to bending.
Author:  Rodger Knox [ Wed Sep 24, 2014 12:39 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
I profile before bending, and I do not use a radius dish.
I don't know if I'd recommend this method to a beginner because gluing the blocks has to be perfect, but it works for me.
Author:  Don Williams [ Wed Sep 24, 2014 12:51 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Here's where a CNC and CAD/CAM software can come in really handy...

I created a 3D model of my last OM, and then created the cut file for the sides. Bend, and then I simply glued on the linings a hair proud and use a radius template (also made with the CNC) to sand the linings to the correct curvature, and then glue on the back.
My top rim stays mostly flat.
Author:  Goodin [ Wed Sep 24, 2014 1:13 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
I do it like Nils. It doesn't take long to make the profile with a sharp spokeshave. Then sand it to radius in the dish. I might try profiling first on the next one. I don't see a reason why not to do that. Cutting the profile on the band saw would be quick.
Author:  jfmckenna [ Wed Sep 24, 2014 3:28 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Nils wrote:
I cut my sides to be as tall as the end block. I then bend. Then I profile them with a plane, and finish up with a radius sanding board. No real profiling prior to bending.

ME too. I've done it both ways. I started off prebending but found that if I leave them square it helps if I over shoot the bend and end up with some cut off which would place the predefined profile off line. I use a hot pipe to bend so I guess if using a bender it would not matter.
Author:  Tom West [ Wed Sep 24, 2014 5:37 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Nils wrote:
I cut my sides to be as tall as the end block. I then bend. Then I profile them with a plane, and finish up with a radius sanding board. No real profiling prior to bending.



Yes, same way here...!
Tom
Author:  ernie [ Wed Sep 24, 2014 7:44 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
I prefer to have my sides flat when bending. I use a silicone heating blanket. /bending form .My tops are flat. Having 2 flat sides .I have the option of choosing which one to profile , so I can get some contrast in the grain of the sides. I use laminated sides , so there is extra work involved. I run a fine pencil line on the inside of the sides in the mold sitting on the 15 ft back radius dish. I profile quickly on the trusty rockwell 6 by 48 sander . glue in the blocks, a quick radius sand and the back is glued on with fish glue , it too is sometimes laminated. Top is glued on last .the current one is WRC with balsa lattice bracing
Author:  Joe Sallis [ Thu Sep 25, 2014 4:44 am ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Only one thing to add- I usually bend on a hot pipe and profile sides later with a block plane. Last build I smacked off a chunk of the sides with the front on the plane and had to repair. So, watch out what you're doing with that plane!
Author:  Goodin [ Thu Sep 25, 2014 11:25 am ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Joe Sallis wrote:
Only one thing to add- I usually bend on a hot pipe and profile sides later with a block plane. Last build I smacked off a chunk of the sides with the front on the plane and had to repair. So, watch out what you're doing with that plane!


One of the reasons why I prefer a spokeshave for this task.
Author:  jfmckenna [ Thu Sep 25, 2014 1:34 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Goodin wrote:
Joe Sallis wrote:
Only one thing to add- I usually bend on a hot pipe and profile sides later with a block plane. Last build I smacked off a chunk of the sides with the front on the plane and had to repair. So, watch out what you're doing with that plane!


One of the reasons why I prefer a spokeshave for this task.

I use a spoke shave too. [:Y:]

I had the same problem with a block plane once but fortunately I had a lot more room to recover.
Author:  Joe Sallis [ Fri Sep 26, 2014 4:37 am ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
Goodin wrote:
Joe Sallis wrote:
Only one thing to add- I usually bend on a hot pipe and profile sides later with a block plane. Last build I smacked off a chunk of the sides with the front on the plane and had to repair. So, watch out what you're doing with that plane!


One of the reasons why I prefer a spokeshave for this task.



Yes, I'll not be using a plane again.
Author:  Quine [ Sat Sep 27, 2014 7:27 pm ]
Post subject:  Re: Profile your sides: before/after bending. Which way and
I profile after bending. I use a chisel to rough it out and a block plane to smooth the taper. I check by laying a level across both sides and sliding it from the butt end to the neck end. This will show if you have one side higher than the other at any point (assuming your bench is level to start with)
Page 1 of 1 All times are UTC - 5 hours
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/