guid.foo
My Gridfinity models
Post-print tweaks to the pegboard shelf
First 1x1 test print showed the hooks and pegs were way too long, the
15° tilt was more aggressive than expected, and the baseplate was
colliding with the backplate after rotation. Shortened j-hooks and
bottom pegs by about half, dialed the tilt back to 10°, and added a
forward clearance offset so the baseplate clears the backplate wall.
Reworked the gusset geometry to follow the actual shelf underside angle
and tuck inside the baseplate radius.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
+20
-15
+20
-15
pegboard-shelf.scad
+20
-15
pegboard-shelf.scad
···
26
26
/* [Options] */
27
27
enable_magnets = false;
28
28
// Tilt shelf forward for bin visibility
29
-
shelf_angle = 15; // [0:5:20]
29
+
shelf_angle = 10; // [0:5:20]
30
30
31
31
// === DERIVED ===
32
32
···
49
49
gusset_depth = shelf_depth;
50
50
num_gussets = max(2, floor(grid_x / 2) + 1);
51
51
52
+
bp_clearance = BASEPLATE_HEIGHT * sin(shelf_angle);
53
+
52
54
hole_options = enable_magnets
53
55
? bundle_hole_options(magnet_hole=true, crush_ribs=true, chamfer=true)
54
56
: bundle_hole_options();
···
67
69
translate([0, -backplate_thick, -BASEPLATE_HEIGHT])
68
70
{
69
71
// Gridfinity baseplate surface
70
-
translate([shelf_width/2, backplate_thick + shelf_depth/2, 0])
72
+
translate([shelf_width/2, backplate_thick + bp_clearance + shelf_depth/2, 0])
71
73
gridfinityBaseplate(
72
74
[grid_x, grid_y], l_grid, [0, 0],
73
75
0, hole_options, 0
74
76
);
75
77
76
-
// Fill the rounded baseplate corners at the backplate edge
78
+
// Fill the clearance gap behind the baseplate
77
79
translate([0, backplate_thick, 0])
78
-
cube([shelf_width, BASEPLATE_OUTER_RADIUS, BASEPLATE_HEIGHT]);
80
+
cube([shelf_width, bp_clearance, BASEPLATE_HEIGHT]);
79
81
}
80
82
81
83
// Gussets (in world coords, bridging tilted shelf to vertical backplate)
···
98
100
// Bottom row pegs (anti-rotation)
99
101
for (i = [0 : num_pegs - 1])
100
102
translate([peg_x_start + i * peg_spacing, 0, bottom_peg_z])
101
-
peg(board_thickness + 4);
103
+
peg(board_thickness + 2);
102
104
}
103
105
104
106
// === MODULES ===
···
111
113
}
112
114
113
115
module j_hook() {
114
-
shaft_behind = 6;
116
+
shaft_behind = 3;
115
117
shaft_length = board_thickness + shaft_behind;
116
-
tip_length = 5;
118
+
tip_length = 3;
117
119
tip_angle = 20;
118
120
119
121
// Straight shaft through the board
···
133
135
// Triangle in the Y-Z plane bridging tilted shelf to vertical backplate
134
136
// rotate([0,90,0]) maps: polygon_x → -world_z, polygon_y → world_y
135
137
136
-
// Hinge point (top of backplate where shelf pivots)
137
-
ay = backplate_thick;
138
-
az = BASEPLATE_HEIGHT;
139
-
140
-
// Front-bottom of tilted shelf
141
-
by = backplate_thick
138
+
// Front-bottom of tilted shelf (pulled back to not overshoot baseplate radius)
139
+
by = backplate_thick + bp_clearance
142
140
+ shelf_depth * cos(shelf_angle)
143
-
- BASEPLATE_HEIGHT * sin(shelf_angle);
141
+
- BASEPLATE_HEIGHT * sin(shelf_angle)
142
+
- BASEPLATE_OUTER_RADIUS;
144
143
bz = BASEPLATE_HEIGHT * (1 - cos(shelf_angle))
145
-
- shelf_depth * sin(shelf_angle);
144
+
- shelf_depth * sin(shelf_angle)
145
+
+ BASEPLATE_OUTER_RADIUS * sin(shelf_angle);
146
+
147
+
// Shelf underside projected back to the backplate face
148
+
ay = backplate_thick;
149
+
az = bz + (by - backplate_thick) * tan(shelf_angle)
150
+
+ BASEPLATE_OUTER_RADIUS;
146
151
147
152
// Bottom of backplate
148
153
cy = backplate_thick;