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NopSCADlib
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Updated images and readme

This commit is contained in:
Chris Palmer 2021-01-09 23:37:06 +00:00
parent 888199f698
commit 53e3378efe
4 changed files with 14 additions and 8 deletions
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libtest.png
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4
readme.md
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@ -2658,6 +2658,8 @@ Linear rails with carriages.
| `rail_carriage(type)` | Carriage type |
| `rail_end(type)` | Minimum distance screw can be from the end |
| `rail_end_screw(type)` | Screw used for ends only (Countersink used for better location) |
| `rail_groove_offset(type)` | Offset of centre of groove from top of rail |
| `rail_groove_width(type)` | Groove width |
| `rail_height(type)` | Height of rail section |
| `rail_hole(type)` | Screw hole diameter |
| `rail_pitch(type)` | Distance between screws |
@ -2678,7 +2680,7 @@ Linear rails with carriages.
|:--- |:--- |
| `carriage(type, rail, end_colour = grey(20)` | Draw the specified carriage |
| `carriage_hole_positions(type)` | Position children over screw holes |
| `rail(type, length)` | Draw the specified rail |
| `rail(type, length, colour = grey(90)` | Draw the specified rail |
| `rail_assembly(type, length, pos, carriage_end_colour = grey(20)` | Rail and carriage assembly |
| `rail_hole_positions(type, length, first = 0, screws = 100, both_ends = true)` | Position children over screw holes |
| `rail_screws(type, length, thickness, screws = 100, index_screws = undef)` | Place screws in the rail |

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18
vitamins/rail.scad
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@ -144,28 +144,32 @@ module rail(type, length, colour = grey(90), use_polycircles = false) { //! Draw
vitamin(str("rail(", type[0], ", ", length, "): Linear rail ", type[0], " x ", length, "mm"));
color(colour) {
rbr = rail_bore(type) / 2;
w = corrected_radius(rbr) * 2 + 2 * eps; // width of core big enough for the holes
linear_extrude(height - rail_bore_depth(type)) difference() {
square([length, width], center = true);
square([length, w], center = true);
rail_hole_positions(type, length)
if (use_polycircles)
poly_circle(r = rail_hole(type) / 2);
poly_circle(rail_hole(type) / 2);
else
circle(r = rail_hole(type) / 2);
circle(d = rail_hole(type));
}
translate_z(rail_height(type) - rail_bore_depth(type))
linear_extrude(rail_bore_depth(type)) difference() {
square([length, rail_bore(type) + 2 * eps], center = true);
square([length, w], center = true);
rail_hole_positions(type, length)
if (use_polycircles)
poly_circle(r = rail_bore(type) / 2);
poly_circle(rbr);
else
circle(r = rail_bore(type) / 2);
circle(rbr);
}
go = height - rail_groove_offset(type);
gw = rail_groove_width(type);
gd = gw / 2;
sw = (width - rail_bore(type)) / 2;
sw = (width - w) / 2;
for (m = [0, 1])
mirror([0, m, 0])
translate([0, -width / 2])