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Code Issues Releases Wiki Activity

Can now specify short inserts to be used for butt_boxes.

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This commit is contained in:
Chris Palmer 2023-01-28 20:22:53 +00:00
parent 005c112ba9
commit 024439d4c2
2 changed files with 12 additions and 7 deletions
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16
printed/butt_box.scad
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@ -51,9 +51,10 @@ function bbox_name(type) = type[8]; //! Optional name if there is more tha
function bbox_skip_blocks(type)= type[9]; //! List of fixing blocks to skip, used to allow a hinged panel for example
function bbox_star_washers(type)= type[10];//! Set to false to remove star washers.
function bbox_thin_blocks(type) = type[11];//! Set for 2 screw blocks instead of three hole fixing blocks.
function bbox_short_inserts(type)= type[12];//! Set to use short inserts in the blocks
function bbox(screw, sheets, base_sheet, top_sheet, span, size, name = "bbox", skip_blocks = [], star_washers = true, thin_blocks = false) = //! Construct the property list for a butt_box
[ screw, sheets, base_sheet, top_sheet, span, size.x, size.y, size.z, name, skip_blocks, star_washers, thin_blocks ];
function bbox(screw, sheets, base_sheet, top_sheet, span, size, name = "bbox", skip_blocks = [], star_washers = true, thin_blocks = false, short_inserts = false) = //! Construct the property list for a butt_box
[ screw, sheets, base_sheet, top_sheet, span, size.x, size.y, size.z, name, skip_blocks, star_washers, thin_blocks, short_inserts ];
function bbox_volume(type) = bbox_width(type) * bbox_depth(type) * bbox_height(type) / 1000000; //! Internal volume in litres
function bbox_area(type) = let(w = bbox_width(type), d = bbox_depth(type), h = bbox_height(type)) //! Internal surface area in m^2
@ -78,7 +79,8 @@ function corner_block_positions(type) = let(
rotate([z > 0 ? 180 : 0, 0, corner * 90 + (z > 0 ? 90 : 0)])
];
function corner_holes(type) = [for(p = corner_block_positions(type), q = corner_block_holes(bbox_screw(type))) p * q];
function corner_holes(type) = let(short = bbox_short_inserts(type))
[for(p = corner_block_positions(type), q = corner_block_holes(bbox_screw(type), short_insert = short)) p * q];
function fixing_block_positions(type) = let(
width = bbox_width(type),
@ -112,7 +114,8 @@ function fixing_block_positions(type) = let(
function side_holes(type) = let(
screw = bbox_screw(type),
holes = bbox_thin_blocks(type) ? 2screw_block_holes(screw) : fixing_block_holes(screw))
short = bbox_short_inserts(type),
holes = bbox_thin_blocks(type) ? 2screw_block_holes(screw, short_insert = short) : fixing_block_holes(screw))
[for(p = fixing_block_positions(type), q = holes) p * q];
module bbox_drill_holes(type, t)
@ -232,6 +235,7 @@ module _bbox_assembly(type, top = true, base = true, left = true, right = true,
tt = sheet_thickness(bbox_top_sheet(type));
star_washers = bbox_star_washers(type);
thin_blocks = bbox_thin_blocks(type);
short = bbox_short_inserts(type);
function is_missing_screw(p) = p.y > depth / 2 - 1 ? !back : false;
@ -241,14 +245,14 @@ module _bbox_assembly(type, top = true, base = true, left = true, right = true,
let(q = transform([0, 0, 0], p), thickness = q.z > 0 ? tt : bt)
multmatrix(p)
fastened_corner_block_assembly(is_missing_screw(q) && ((q.z > 0) != (q.x > 0)) ? 0 : t, bbox_screw(type), thickness,
is_missing_screw(q) && ((q.z > 0) == (q.x > 0)) ? 0 : t, star_washers = star_washers);
is_missing_screw(q) && ((q.z > 0) == (q.x > 0)) ? 0 : t, star_washers = star_washers, short_insert = short);
h = height / 2 - 1;
for(p = fixing_block_positions(type))
let(q = transform([0, 0, 0], p), thickness = q.z > h ? tt : q.z < -h ? bt : t)
multmatrix(p)
if(thin_blocks)
fastened_2screw_block_assembly(is_missing_screw(q) ? 0 : t, bbox_screw(type), thickness_below = thickness, star_washers = star_washers);
fastened_2screw_block_assembly(is_missing_screw(q) ? 0 : t, bbox_screw(type), thickness_below = thickness, star_washers = star_washers, short_insert = short);
else
fastened_fixing_block_assembly(is_missing_screw(q) ? 0 : t, bbox_screw(type), thickness2 = thickness, star_washers = star_washers);

3
readme.md
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@ -4697,6 +4697,7 @@ fixing_blocks along the sides.
| `bbox_name(type)` | Optional name if there is more than one box in a project |
| `bbox_screw(type)` | Screw type for corner blocks |
| `bbox_sheets(type)` | Sheet type for the sides |
| `bbox_short_inserts(type)` | Set to use short inserts in the blocks |
| `bbox_skip_blocks(type)` | List of fixing blocks to skip, used to allow a hinged panel for example |
| `bbox_span(type)` | Maximum span between fixing blocks |
| `bbox_star_washers(type)` | Set to false to remove star washers. |
@ -4707,7 +4708,7 @@ fixing_blocks along the sides.
### Functions
| Function | Description |
|:--- |:--- |
| `bbox(screw, sheets, base_sheet, top_sheet, span, size, name = "bbox", skip_blocks = [], star_washers = true, thin_blocks = false)` | Construct the property list for a butt_box |
| `bbox(screw, sheets, base_sheet, top_sheet, span, size, name = "bbox", skip_blocks = [], star_washers = true, thin_blocks = false, short_inserts = false)` | Construct the property list for a butt_box |
| `bbox_area(type)` | Internal surface area in m^2 |
| `bbox_volume(type)` | Internal volume in litres |