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| Tail and heelblock preparation http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=28280 |
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| Author: | segovia [ Mon Jul 19, 2010 2:49 pm ] |
| Post subject: | Tail and heelblock preparation |
I am getting ready to fit tail and heel block to my sides which are in the mold. I will leave them 1/32" proud of the sides to match the kerfing, is it good practice to cut/set an angle on the top and bottom of the blocks before I glue them in? My sides have already been tapered before bending, I using a 15 degree back and 28 degree top. If so what angles shall I use, 1.5 degrees on the top of the heel block seems about right, what are the others? Regards John |
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| Author: | Robbie O'Brien [ Mon Jul 19, 2010 3:02 pm ] |
| Post subject: | Re: Tail and heelblock preparation |
John, I put the radius on the top and bottom of the blocks when I radius the kerfing and sides. Here is a video that might answer some of your questions. |
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| Author: | Daniel Minard [ Mon Jul 19, 2010 3:14 pm ] |
| Post subject: | Re: Tail and heelblock preparation |
If you are using concave sanding dishes, they will take the blocks down perfectly in short order. I don't bother cutting the angles. If your heel block has a long tongue on it, make sure you leave enough material. I DO put the tongue on at a +2 degree angle & sand to shape afterwards. I leave way more than 1/32" top & bottom... Give yourself some wiggle room. It's not a big job sanding off a little excess. |
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| Author: | Tom West [ Mon Jul 19, 2010 5:33 pm ] |
| Post subject: | Re: Tail and heelblock preparation |
Same as Robbie...! Tom |
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| Author: | James W B [ Mon Jul 19, 2010 5:36 pm ] |
| Post subject: | Re: Tail and heelblock preparation |
Ditto on what Robbie does. James |
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| Author: | segovia [ Tue Jul 20, 2010 12:45 am ] |
| Post subject: | Re: Tail and heelblock preparation |
Hi I don't use a radius dish, to be honest I am still struggling with the concept of a radius dish so it is probably best to leave that for another post. I use a radius stick which is about 22" long and 1 1/2 " wide with 15 and 28 radius's. I draw the sticks from the heel to the tail block on the top and back after the kerfing is in place, this puts an angle on the kerfing. I suppose my question is do I leave the block proud or leave the blocks proud with a slight angle. Its all a question of geometry which I am struggling to understand. J |
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