But luthiers are supposed to love jigs and fixtures! Next thing you know you guys will be unscrewing light bulbs by hand!
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| Scarf Joint Clamping Product/Idea http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=34080 |
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| Author: | Mark Fogleman [ Mon Oct 31, 2011 8:02 am ] |
| Post subject: | Scarf Joint Clamping Product/Idea |
I'm thinking 2 Strap Hinges will do the same job. |
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| Author: | Pat Foster [ Mon Oct 31, 2011 8:15 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Nice tool, but there's nothing to keep the two pieces from skating around. Pat |
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| Author: | murrmac [ Mon Oct 31, 2011 9:51 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Pat Foster wrote: Nice tool, but there's nothing to keep the two pieces from skating around. Pat As the guy demonstrating it says, if the force is perpendicular to the mating surfaces, there won't be any slippage. |
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| Author: | theguitarwhisperer [ Mon Oct 31, 2011 9:57 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Do those come in a three inch wide version to clamp across the entire width of the scarf? If so, I'd get some, looks like a great system. |
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| Author: | theguitarwhisperer [ Mon Oct 31, 2011 9:57 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Do those come in a three inch wide version to clamp across the entire width of the scarf? If so, I'd get some, looks like a great system. |
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| Author: | theguitarwhisperer [ Mon Oct 31, 2011 9:57 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Do those come in a three inch wide version to clamp across the entire width of the scarf? If so, I'd get some, looks like a great system. |
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| Author: | Robert Renick [ Mon Oct 31, 2011 10:21 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
They look cool and certainly will work, but for me the fun of woodworking is making weird custom cauls for specific applications. Generally this scrap wood and 15 minutes. When I first saw it I was hoping for a clamp to go into the holes so the fumbling in the video does not happen, a pivoting arm with a flat spot in the holes could work too. It is a good solution, but hard to compete in price with 15 minutes and scrap wood. I don't have any pictures of the FJ clamp I made for this project, 40' glue ups each with 2 FJ's. There were a total of 108 boards made 15" x 40'. The clamp rack pictured is made from a warehouse shelving unit on its side. It was made and used for this project only. FJ's done on a shaper with a sled, side glue joints on a moulder, finished in a wide belt, wood was reclaimed teak. |
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| Author: | Tom West [ Mon Oct 31, 2011 10:33 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Interesting and a good candidate for stew mac catalog but I use and prefer the same setup Filippo is showing. Tom |
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| Author: | Mark Fogleman [ Mon Oct 31, 2011 11:32 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
theguitarwhisperer wrote: Do those come in a three inch wide version to clamp across the entire width of the scarf? If so, I'd get some, looks like a great system. Wouldn't be too difficult to make a 3" version out of scrap plywood and a piece of broom stick. |
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| Author: | Mark Fogleman [ Mon Oct 31, 2011 11:43 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
murrmac wrote: Pat Foster wrote: Nice tool, but there's nothing to keep the two pieces from skating around. Pat As the guy demonstrating it says, if the force is perpendicular to the mating surfaces, there won't be any slippage. I think his precision requirements are different than ours. I use a clipped brad ~1/16" proud in one side of the scarf bevel as insurance. It prevents slippage in case I'm not dead on perpendicular. |
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| Author: | Pat Foster [ Mon Oct 31, 2011 12:46 pm ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
murrmac wrote: Pat Foster wrote: Nice tool, but there's nothing to keep the two pieces from skating around. Pat As the guy demonstrating it says, if the force is perpendicular to the mating surfaces, there won't be any slippage. Ah, yes. And therein lies the rub. I use this. One block added to my scarf jig, where the clamp at the lower right is. Borrowed from Cumpiano. Attachment: picture-5.jpg
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| Author: | John Killin [ Mon Oct 31, 2011 1:21 pm ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
If you look in the video, either he didn't line it up (which with the fumbling may be the case) or it slipped. I finally spent 10 minutes making the Cumpiano fixture and had really good results without the emergency clamp shuffle I had been doing in previous attempts. |
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| Author: | John Coloccia [ Mon Oct 31, 2011 9:12 pm ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Todd Stock wrote: Or just use the Cumpiano jig which is trouble free and dirt simple I made my version of Cumpiano's jig and haven't looked back. I like that it's simple to caul the joint full width, and it's simple to test fit before gluing, knowing that my glue joint will have identical alignment to the test fit. |
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| Author: | theguitarwhisperer [ Mon Oct 31, 2011 9:15 pm ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Tarhead wrote: theguitarwhisperer wrote: Do those come in a three inch wide version to clamp across the entire width of the scarf? If so, I'd get some, looks like a great system. Wouldn't be too difficult to make a 3" version out of scrap plywood and a piece of broom stick. Hey, you're right! Good idea. |
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| Author: | TonyKarol [ Tue Nov 01, 2011 6:58 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Does your bench have dog holes ???? Then no jig required. I use a bench dog to stop/set the end of the headstock piece. Then use a bar clamp the neck piece to the bench in its correct alignment. Add glue and clamp the headstock piece to the neck piece. Done. This takes all of 2 minutes to set up. I leave it claped to the bench for about ten minutes, then its set enough that you can unclamp from the bench and carry on with something else. |
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| Author: | Peter J [ Tue Nov 01, 2011 7:49 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
I'm with Phillipo and Tony. I just use plywood end stops clamped or bench dogged down to prevent the slippage. No jigs or special tooling involved. I already have too many "special" tools laying around. Let the KISS principle prevail. |
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| Author: | Clay S. [ Tue Nov 01, 2011 8:58 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
But luthiers are supposed to love jigs and fixtures! Next thing you know you guys will be unscrewing light bulbs by hand!
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| Author: | TonyKarol [ Tue Nov 01, 2011 1:11 pm ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Unscrewing light bulbs by hand ... nah .. thats what apprentices are for .... ![[clap]](./images/smilies/smiley32.gif "adulations")
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| Author: | Bryan Bear [ Tue Nov 01, 2011 1:33 pm ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Clay S. wrote: But luthiers are supposed to love jigs and fixtures! Next thing you know you guys will be unscrewing light bulbs by hand! I never have to unscrew light bulbs because I drive mine in with a hammer. |
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| Author: | David Malicky [ Tue Nov 01, 2011 2:01 pm ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
Bryan Bear wrote: I never have to unscrew light bulbs because I drive mine in with a hammer.
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| Author: | CWLiu [ Tue Nov 01, 2011 7:48 pm ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
I started out using Cumpiano's method. Now I use two position pins/nails and clamp the joint. Just drill the holes when they are lined up the way I like. |
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| Author: | Setch [ Wed Nov 02, 2011 2:58 am ] |
| Post subject: | Re: Scarf Joint Clamping Product/Idea |
http://home.asparagine.net/ant/blog/?p=121 Here's how I do it - no jig, nothing clamped to my workbench and perfect results. It's idiotically simple (probably how I stumbled upon it!). Everyone I know who has tried it has stuck with it and been very happy. |
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