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Dish Radius Jig
http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10102&t=4085
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Author:  j.Brown [ Tue Dec 13, 2005 7:35 am ]
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Does anyone have photos of a (built) dish radiusing jig per the plans sold by Lance? I have the plans and I have a pretty good handle on it, but any photos would be greatly appreciated.
Thanks.

-j.

Author:  old man [ Tue Dec 13, 2005 8:10 am ]
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J. Brown, I don't know how close this jig is to the one Lance has, but it works very well. You can see two sets of guides, one for 28' radius and one for 15'.

Ron


Author:  PaulB [ Tue Dec 13, 2005 8:43 am ]
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I've built the jig but don't have any pics. Really busy time of year for me, I've built the jig but haven't had time to use it I'm going to dish the dishes (4 of them) outside, it should be interesting 'cause my neighbours are fanatical about washing their cars and I'm gonna make lots of dust. It'll give em an excuse to wash them again 'cause I know they love doing it. That's me - good neighbour.

I'll see if I can get a few pics tonight when I get home. I used bigger wheels than the plan called for 'cause I could get some cheap and then adjusted their position on the jig to compensate.

Author:  Michael Dale Payne [ Tue Dec 13, 2005 8:51 am ]
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It is very much like Ron's shown but uses bearing wheels to index aginst the blank. One thing I do need to say is the blank need to be round and smooth of the outer edges of you circle is real rough then it will not turn freely. I cut my blanks with a router on a cicle attachment and it leaves me a relitive smooth surface for the bearings to index aginst.

Author:  PaulB [ Tue Dec 13, 2005 9:49 pm ]
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Ok here's some pics, I made mine a little differently in that I used a thicker base plate 'cause I've got a great huge lump of a (3 1/4 hp) router and I didn't want the jig to sag in the middle under the weight, I also made it wider to accomodate the router base plate, I just added the difference to the other dimensions. Also the wheels are a little larger in diameter 'cause they were cheap and suitable and right in front of me when I was in the hardware store - they were designed for sliding doors. The jig is a little rough by some standards 'cause I'm not one to make pretty jigs, if it works well that's good enough for me, especially if I'm only going to use it a couple times.



As you can see I don't have the radiused rails installed (or even made yet)but you can see where they're supposed to go.



Here's a pic of the underside, you can see how the wheels are placed in relation to the dish.



Here's a pic from the side showing how the wheels index against the side of the dish. I'm using 32mm mdf which is about 1 1/4" in the old money.

Hope this makes it clear, if you've got any questions ask away.

*edit* er, Lance it just occured to me that people could build the jig from these pics rather than the plans - depriving the OLF of revenue. Please feel free to delete my post if it will help the OLF.PaulB38700.2453819444

Author:  j.Brown [ Wed Dec 14, 2005 3:30 am ]
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I have them. Thanks for the photos. Thanks for the plans, Lance. I was just looking for a little more visual guidance, so please remove the photos if you feel it infringes on the copyright or value of the plans.
-j.

Author:  LanceK [ Wed Dec 14, 2005 3:36 am ]
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actualy it may help! Showing what a great jig Michael created!

Looks great guys!

Author:  Michael Dale Payne [ Wed Dec 14, 2005 3:58 am ]
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Thanks for the kind kodos Lance

Actually Paul I like the idea of the beefed up base and nothing rong with the door rollers either.

I think the big advantage about this jig is the ability have interchangable radius rails. I build OM's and SJ with 15' back radius and 25' top and Dreads with 16' back and 28'top so that is 4 differnt radii but only one jig.

Author:  PaulB [ Wed Dec 14, 2005 9:21 am ]
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Yeah, it is a great jig.

One thing I forgot to mention is that if you make it wider to accomodate a wider router base, then you've also got to make it longer at each end as well. What I did was to draw it all out on the base before I started cutting and routing. Then fit the base over the dish blank, put the router on top and started looking for problems - that's when I picked up the length problem. Also if you beef up the base you have to check that your router will have enough plunge depth.

Author:  Michael Dale Payne [ Thu Dec 15, 2005 1:27 am ]
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Yep it was designed for a laminate trimer not a router.

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