56 lines
2.3 KiB
Markdown
56 lines
2.3 KiB
Markdown
# roubo
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[OpenSCAD](https://openscad.org/) model of a 'roubo' style carpentry bench.
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The 'roubo' bench is a style of woodworking bench constructed primarily from
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softwood and without metal fastenings, traditional in parts of east Asia. The
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internally threaded blocks for the two vices are clearly turned from close-
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grained hardwood; I suspect the moving block for the end vice, and
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the treenails and locking wedges, should also be hardwood.
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All dimensions in this model are in millimetres.
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If reasonable sizes for top planks include 150mm (which is
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what we have) then the maximum possible diameter of a vice
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screw is 25mm; which means we may as well use commercial
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metal threaded rod. A wooden screw that small would be
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finicky to make and pretty fragile.
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if you can get 200x75mm for the top planks then a turned wooden screw
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may become more practical, but I have not parameterised the screw
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diameter
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This file is partially constructed from analysis of [this video](https://www.youtube.com/watch?v=XhAEbklxJME).
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Key points:
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1. 1:55-3:08 leg top joint detail
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2. 3:10-7:50 top plank end tenon detail
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3. 7:50-9:20 cutting end vice slot (I don't think the cutting of the internal slot for the end vice moving block is ever shown)
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4. 9:30-10:14 dowels to assemble top planks
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5. 10:24-13:25 detail of end vice assembly
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6. 10:24-13-09 top end cap assembly
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7. 13:30-14:20 cutting end tenons of leg cross brace
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8. 14:20-16:40; 19:30-20:00 front vice assembly
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9. 16:42-17:08 assembling leg cross brace
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10. 17:20-18:05 leg longitudinal brace
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11. 18:20-18:55 assembling leg assembly to top assembly
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This model is parameterised and is resizeable within limits, but if you vary any dimenstion by more than about 25% you're probably going to need to do some rework.
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Colours are for clarity only.
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## Errata/todo:
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1. locking wedges and treenails are generally not present in this
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drawing;
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2. mortices and holes for wedges and treenails are not all present;
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3. two of the tapered mortices for the longitudinal braces are the
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wrong way round;
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5. while all tenons are modelled, not all mortices are; where a tenon
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intersects an apparently solid piece, assume there is a mortice!
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## Licence
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[Creative Commons Attribution/Non-commercial/Share Alike](https://creativecommons.org/licenses/by-nc-sa/4.0/deed.en)
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