It will be within a few thousandths properly done Fred, which would be as close as cutting it from a piece of paper. Plently accurate for at least my purposes
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| Need a favor from a CAD user - radius arcs needed in PDF http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=29337 |
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| Author: | John A [ Mon Oct 04, 2010 3:44 pm ] |
| Post subject: | Need a favor from a CAD user - radius arcs needed in PDF |
Hi everyone, I was hoping some you smart guys or gals can make some radius arcs - to help shape the braces. I tried the ruler thing - flexing it - but I am not happy with the results - I want a template I can just print out and glue to a piece of wood and then shape the wood with the template. For my back braces I need a 11' radius, and 8' radius, and a 20' radius Or is there a program that can do this for me - so I can print out the arcs segments as needed ? Seems so simple - but I can't find anything - Thanks in advance ! |
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| Author: | John A [ Mon Oct 04, 2010 3:50 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
better yet - can someone create a PDF that has all the common arc radius' all on one page ? So as someone needs it - he or she can print it out and cut out the arc they need. Even if it has to be printed on 11x17" paper - it would be useful, or if you can tape together a few sheet of 8 1/2" x 11 paper that would work too. I was thinking - if you print the arcs in landscape mode - you can get more of the length on there - it would be useful to have a center line on the arc too. |
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| Author: | JoeUlman [ Mon Oct 04, 2010 5:51 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
John - Could you use a steel measuring tape with the end pinned to the floor and a marking knife or pencil secured at the various radii? BTW, I have used the free version of Google SketchUP, a 3D modeling program to model most of the geometry on the guitar. Arcs are very easy. There’s a slight learning curve for the program of course, but it comes in very handy. Joe |
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| Author: | Darrel Friesen [ Mon Oct 04, 2010 6:08 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
A piece of string, a nail and a pencil works good too. |
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| Author: | John A [ Mon Oct 04, 2010 6:14 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
I thought of that but it would be useful for lots of people to have a siple pdf to print with various arcs. |
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| Author: | LuthierSupplier [ Mon Oct 04, 2010 6:46 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
Or you could order some of my radius gauges here: http://www.luthiersuppliers.com/products/p7.html With these you don't need to print anything. Just place it on the wood and trace the arc with a pencil on the brace. These are convex and concave on each side. Good luck! |
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| Author: | CharlieT [ Mon Oct 04, 2010 6:47 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
John - I could create a PDF with those radii. I will do that and post it shortly. |
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| Author: | CharlieT [ Mon Oct 04, 2010 7:10 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
Here you go John. This is scaled for 11" x 17" so it will need o be printed on that size paper in order to be accurate. |
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| Author: | John A [ Mon Oct 04, 2010 7:11 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
Thanks Charlie And LuthierSupplier, that ia also a good idea and alternative |
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| Author: | CharlieT [ Mon Oct 04, 2010 7:24 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
Oops...I somehow missed LuthierSupplier's response. Their templates are definitely the way to go if you don't have CAD and want a high quality template that can be used over and over. |
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| Author: | Fred Tellier [ Mon Oct 04, 2010 9:06 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
The tape rule or string method is not very accurate in my opinion, I have a set of templates and they are a great tool. Fred |
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| Author: | Darrel Friesen [ Mon Oct 04, 2010 10:08 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
It will be within a few thousandths properly done Fred, which would be as close as cutting it from a piece of paper. Plently accurate for at least my purposes
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| Author: | Heath Blair [ Mon Oct 04, 2010 10:15 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
http://gicl.cs.drexel.edu/people/sevy/l ... mpass.html replace the pencil with a router and you can very accurately make your own templates. i did. or just use the method to draw the arc. its the best method ive come across. short of someone else making them with a CNC, that is. that, of course, costs significantly more. |
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| Author: | CharlieT [ Tue Oct 05, 2010 5:32 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
Per John's request, I have added 3 additional radii to the attached PDF. |
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| Author: | JohnAbercrombie [ Tue Oct 05, 2010 6:54 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
Charlie- Thanks for those files- very useful. Steve Senseney produced a similar .pdf which is accessible from the MIMF library. You can get it printed full size at any place that has a large format printer, or use it to lay out your large radius template, or check the results from a long compass layout. Attachment: Steve Senseney 15 18 25 radii.pdf Cheers John |
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| Author: | CharlieT [ Tue Oct 05, 2010 7:56 pm ] |
| Post subject: | Re: Need a favor from a CAD user - radius arcs needed in PDF |
My pleasure, John. I like the fact that Steve's file includes the offset measurements, which is a good idea. Thanks for posting it. |
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