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New Luthier Tips du Jour video - The Spanish Heel
http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=21072		 Page 1 of 1
Author:  Robbie O'Brien [ Mon Feb 16, 2009 10:12 am ]
Post subject:  New Luthier Tips du Jour video - The Spanish Heel
I just uploaded the latest Luthier Tips du Jour video. The topic is slotting the Spanish heel using a table saw. As always, comments and discussion are welcome.
Enjoy!
Author:  Colin S [ Mon Feb 16, 2009 10:50 am ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Simple and well explained Robbie, as usual.

I like to use the Romanillos double wedge, (two opposed wedges each side) so I guess it would be a matter of having two different sized spacers 10mm different to make the two cuts on each side before chiselling out the wood.

Colin
Author:  Robbie O'Brien [ Mon Feb 16, 2009 10:56 am ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Colin S wrote:
Simple and well explained Robbie, as usual.

I like to use the Romanillos double wedge, (two opposed wedges each side) so I guess it would be a matter of having two different sized spacers 10mm different to make the two cuts on each side before chiselling out the wood.

Colin


Thank you Colin, You are correct. That would work for the Romanillos type wedged heel joint he uses. For folks who have table saws without tilting blades you can make a shim to raise the neck on the peghead end and get the angle that way.
Author:  ChuckH [ Mon Feb 16, 2009 11:12 am ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Thanks for another video Robbie.

Chuck
Author:  WaddyThomson [ Mon Feb 16, 2009 11:13 am ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Nice Robbie. I think I ran into trouble trying to get a compound angle when I was trying to cut the 10 mm slot. On the plan I have, the width of the center strip is about 25 - 30 mm wide at the top, going to a point at the bottom, which makes the wedges follow the angle of the side of the Spanish foot. Turning the miter gauge around might have helped that problem. I think I'll try some experiments on some 2x4's instead of using necks I've put a V-joint in. [headinwall] [headinwall]
Author:  Dave_UK [ Mon Feb 16, 2009 11:15 am ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Hi Robbie

Many thanks for the video's they help explain the different techiniques very well [clap]

Could you please tell me why you turned the Mitre fence round when you made the second tenon cut as I can't see why you did this? Sorry not trying to criticise just can't understand why it was done thats all :)

Dave
Author:  WaddyThomson [ Mon Feb 16, 2009 11:24 am ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
So he could cut the second slot with the neck turned around, with the top of the neck in contact with the miter gauge instead of using a different surface. This way, both slots are exactly the same.
Author:  SniderMike [ Mon Feb 16, 2009 11:41 am ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Que bueno, señor! Great as always.
Author:  Dave_UK [ Mon Feb 16, 2009 11:56 am ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Hi Waddy

thanks for the reply [:Y:]

I get what you mean but would it make a large amount of difference if the timber is square to start with? Any benefit is negligible as you are holding against the mitre fence which is dangerous as the wood could slip or pull away from the mitre as you push through?

Don't mean to sound offish just can't see it would make a great difference and its not altogether safe!

Dave
Author:  Colin S [ Mon Feb 16, 2009 12:07 pm ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Dave, it is always best to use the same surface, in this case more so as the whole of the mitre fence then bears against the length of the neck surface for both cuts, rather than just the shorter less stable heel block, on the second one.

If you are worried just clamp the neck to the mitre fence

Colin
Author:  Robbie O'Brien [ Mon Feb 16, 2009 12:12 pm ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Dave,

Colin and Waddy are correct. This way is the best way to make sure the slots line up after cutting. If you try adjusting the miter gauge or neck, you will have misaligned slots, Believe me! [headinwall]
If you have safety concerns then try clamping the neck to the miter gauge for extra support.
Author:  Marc [ Mon Feb 16, 2009 12:26 pm ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Nice Video Robbie.

After watching your DVD a couple of years ago I made a jig based on your method for cutting the slot but with a tilt so that the cut wasn't as deep on the top side. You just run it through one way, then flip the neck over, clamp it to the other side and run it through the other, the fence stop made sure the slots were symetrical, worked great. I also had a thin kerf 8" hitachi blade that cut a .086" slot, just about right for my sides. Unfortunately the oak miter runner warped and I needed a new blade, I never got around to replacing either, so now I just cut them by hand and do the Romanillos heel-- I'm a slow builder anyway.
Attachment:
HeelJIG.JPG
Author:  Robbie O'Brien [ Mon Feb 16, 2009 12:29 pm ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Nice Jig Marc!! That is another way it could be done. Thanks for sharing.
Author:  Ricardo [ Mon Feb 16, 2009 2:02 pm ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Robbie, I guess this approach assumes that the neck has no positive angle to the body. How would you modify it to account for say a 2 degree positive angle?
Author:  WaddyThomson [ Mon Feb 16, 2009 2:07 pm ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Not the case at all, Ricardo. The angle is so negligible that it is not taken into account. A 2mm drop in 325 mm is not much of an angle, You can't even see it in the sides.
Author:  Robbie O'Brien [ Mon Feb 16, 2009 2:15 pm ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
WaddyThomson wrote:
Not the case at all, Ricardo. The angle is so negligible that it is not taken into account. A 2mm drop in 325 mm is not much of an angle, You can't even see it in the sides.


[:Y:] [:Y:] [:Y:]
Author:  Ricardo [ Mon Feb 16, 2009 2:24 pm ]
Post subject:  Re: New Luthier Tips du Jour video - The Spanish Heel
Robbie, thats comforting. Thanks for the tip! [:Y:] [:Y:]
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