Very nice bryce. The one I made was wood (oak) and inspired by this video. Fun stuff!
Very nice bryce. The one I made was wood (oak) and inspired by this video. Fun stuff!
Hats off! Looks impressive. Where did those wheels with the "hollow ground" centers for riding the track come from? Probably hard to do but this machine looks like it is crying for a YouTube video of it in action?
Like this.
Last edited by Bernie Daniel; Jan-04-2015 at 9:55am.
Bernie
____
Due to current budgetary restrictions the light at the end of the tunnel has been turned off -- sorry about the inconvenience.
I'm reviving an older thread to see if I can get help with laying out contours on top or bottom plates.
I'm using Andrew Mowry's contour maps with two piece plates. The glued, rough plate is tapered from center/midline (about 25 mm thick) to edge (about 10 mm thick). If the plate were flat--if it were a consistent thickness from middle to edge--I'd have no problem tacking the (flat) contour map to the (also flat) piece of wood and drilling away. Since it's tapered from center to edge, it seems to me that if I tacked the paper to the wedge-shaped plate I'd be distorting the contours.
Any thoughts for how to lay out these contours accurately with my flat template over an uneven surface?
Thanks for your help. Thanks in particular to Andrew Mowry.
I make the center thickness just about where it needs to be - 18mm. So sand it down in the middle some more and the contours won't be so distorted.
Isabel Mandolins
https://www.facebook.com/pages/Arche...50923841658006
There's no problem with using wedge shaped wood. The distortion is actually smaller than you think. You won't be able to drill the holes or route the steps as precisely as you mark them over the wedge from templates. The diference due to the slope would be less than thickness of a line made by blunt pencil , nothing to worry about. Also you can plane down the thickness to your maximum arch height before you start with arch (on planer or similar machine). It will save you a lot of handwork.
Adrian
Id also bring the center to 18mm to start but would try to plan on finishing things out closer to the 15-16mm mark depending on stiffness. Just don't start the inside until all is final on the outside so you can monitor that center thickness easier [arch height].
I'd agree with Adrian that the distortion resulting from bending the templates down over arch is probably pretty minimal. I always treated the contours as approximate guidelines anyway. I'm glad the templates have been useful!
Andrew Mowry
Mowry Stringed Instruments
http://mowrystrings.com
Also visit me on Facebook to see work in progress and other updates.
'Gotta admit that I secretly lust after that Clone 4D carver more than a LLoar signed F5!!!!!!
Bernie, Sorry I never answered your question. The wheels are just V-belt pulleys.
David Houchens
http://bryceinstruments.com/
i used to do exactly what michael lewis said in his reply..the thing i found was important was the leveling of the top or back. if you try to do it on a sanding board it will take forever..to avert that problem i carved out the inside up to almost the recurve area, then leveled it..gavin
Gavin Baird
http://www.sheba.ca
Bookmarks