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NopSCADlib
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screw_head_depth() now defaults to all of a cs head if no diameter specified.

This commit is contained in:
Chris Palmer 2020-12-10 17:29:48 +00:00
parent b4f8892b1a
commit dd757a1461
2 changed files with 5 additions and 2 deletions
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2
readme.md
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@ -2930,7 +2930,7 @@ Machine screws and wood screws with various head styles.
| Function | Description |
|:--- |:--- |
| ```screw_boss_diameter(type)``` | Boss big enough for nut trap and washer |
| ```screw_head_depth(type, d)``` | How far a counter sink head will go into a straight hole diameter d |
| ```screw_head_depth(type, d = 0)``` | How far a counter sink head will go into a straight hole diameter d |
| ```screw_longer_than(x)``` | Returns shortest screw length longer or equal to x |
| ```screw_nut_radius(type)``` | Radius of matching nut |
| ```screw_shorter_than(x)``` | Returns longest screw length shorter than or equal to x |

5
vitamins/screw.scad
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@ -41,7 +41,10 @@ function screw_pilot_hole(type) = type[11]; //! Pilot hole radius for w
function screw_clearance_radius(type) = type[12]; //! Clearance hole radius
function screw_nut_radius(type) = screw_nut(type) ? nut_radius(screw_nut(type)) : 0; //! Radius of matching nut
function screw_boss_diameter(type) = max(washer_diameter(screw_washer(type)) + 1, 2 * (screw_nut_radius(type) + 3 * extrusion_width)); //! Boss big enough for nut trap and washer
function screw_head_depth(type, d) = screw_head_height(type) ? 0 : screw_head_radius(type) - d / 2 + screw_radius(type) / 5; //! How far a counter sink head will go into a straight hole diameter d
function screw_head_depth(type, d = 0) = //! How far a counter sink head will go into a straight hole diameter d
screw_head_height(type)
? 0
: let(r = screw_radius(type)) screw_head_radius(type) - max(r, d / 2) + r / 5;
function screw_longer_than(x) = x <= 5 ? 5 : //! Returns shortest screw length longer or equal to x
x <= 8 ? 8 :