3-1/8" x 3-1/8" x 3-1/8" outside, 5 panels, 3.4 m of cord, no glue.
Looking down. Open top: the lacing needs a hand inside the last corner.
Hidden-line projection of the real solids. The lace holes sit inboard of the finger roots, where both boards are solid the whole way along.
| Part | Qty | Length | Width | Thick | Lace holes |
|---|---|---|---|---|---|
| LEFT, RIGHT | 2 | 3-1/8" (79.4 mm) | 3-1/8" (79.4 mm) | 1/4" (6.0 mm) | 5 |
| FRONT, BACK | 2 | 3-1/8" (79.4 mm) | 3-1/8" (79.4 mm) | 1/4" (6.0 mm) | 6 |
| BOTTOM | 1 | 3-1/8" (79.4 mm) | 3-1/8" (79.4 mm) | 1/4" (6.0 mm) | 6 |
Every panel is 1/4" (6.0 mm) baltic_quarter. Cut to the mm; the fraction is a cross-check.
| Qty | Unit | Part | Kind |
|---|---|---|---|
| 3448 | mm | cord_poly_1_0 | cord |
The cord is bought by the metre, so the bill totals a length rather than a count. Buy a spool: 3.4 m is what this box needs and a knot goes wrong.
Thread every hole in order. The side alternates on its own: solid is the first pass going over the outside, dashed is where it comes back inside, and the second pass takes the other side of each leg. 3 holes along the width, 2 crossings. BOTTOM’s holes are 11/32" (9.0 mm) from the arris and FRONT’s are 11/32" (9.0 mm). Cut 405 mm of cord for this corner.
Thread every hole in order. The side alternates on its own: solid is the first pass going over the outside, dashed is where it comes back inside, and the second pass takes the other side of each leg. 4 holes along the height, 3 crossings. FRONT’s holes are 11/32" (9.0 mm) from the arris and LEFT’s are 11/32" (9.0 mm). Cut 457 mm of cord for this corner.
| Corner | Crossings | Cord |
|---|---|---|
| FRONT/LEFT | 3 crossings zigzagged | 457 mm |
| BACK/LEFT | 3 crossings zigzagged | 457 mm |
| FRONT/RIGHT | 3 crossings zigzagged | 457 mm |
| BACK/RIGHT | 3 crossings zigzagged | 457 mm |
| BOTTOM/LEFT | 2 crossings zigzagged | 405 mm |
| BOTTOM/RIGHT | 2 crossings zigzagged | 405 mm |
| BOTTOM/FRONT | 2 crossings zigzagged | 405 mm |
| BACK/BOTTOM | 2 crossings zigzagged | 405 mm |
laser/sheets/. Inner features run before outlines, so every panel is still held in the sheet while its share of the 28 lace holes is cut.| Check | Result | Measured |
|---|---|---|
| the loop solves and nothing clashes | pass | 5 boards, no pair shares a cubic millimetre |
| the box stays open somewhere | pass | 5 faces: the lacing needs a hand inside the last corner, so a closed box cannot be sewn shut from outside |
| kerf compensation runs the right way through a hole | pass | measured 2.4000 mm vs 2.4000 mm — error 4.44e-16 mm (tolerance 1e-06) |
| the hole that comes off the machine passes the cord twice | pass | 2.20 mm path + 0.2 mm kerf = 2.40 mm hole, against 2 mm of cord: 0.40 mm to thread with |
| LEFT fits the bed | pass | 79.4 x 79.4 mm on a 600 x 300 mm bed |
| LEFT cuts inside a 3-1/4" square | pass | 79.6 x 79.6 mm against 82.5 mm |
| RIGHT fits the bed | pass | 79.4 x 79.4 mm on a 600 x 300 mm bed |
| RIGHT cuts inside a 3-1/4" square | pass | 79.6 x 79.6 mm against 82.5 mm |
| FRONT fits the bed | pass | 79.4 x 79.4 mm on a 600 x 300 mm bed |
| FRONT cuts inside a 3-1/4" square | pass | 79.6 x 79.6 mm against 82.5 mm |
| BACK fits the bed | pass | 79.4 x 79.4 mm on a 600 x 300 mm bed |
| BACK cuts inside a 3-1/4" square | pass | 79.6 x 79.6 mm against 82.5 mm |
| BOTTOM fits the bed | pass | 79.4 x 79.4 mm on a 600 x 300 mm bed |
| BOTTOM cuts inside a 3-1/4" square | pass | 79.6 x 79.6 mm against 82.5 mm |
| cord to buy | 3.4 m | 8 corners, 150 mm a tail at each end |
| stitches | 20 | crossings in total, each threaded twice over |
| the baltic_quarter nest stays on the bed | pass | 5 parts inside 427.9 x 85.6 mm |
| baltic_quarter cutting area | 16.61 x 3.13 in | 421.9 x 79.6 mm, edge of cut to edge of cut, 0.36 sq ft of stock |
Plus the frame’s own: every joint’s conscience, and the assertion that no two boards share a cubic millimetre.
| From the frame | Result | |
|---|---|---|
| laser can cut baltic_quarter (flat on the bed, cut straight through) | pass | |
| FRONT/LEFT finger count 5 is odd (one program serves both ends) | pass | |
| lace hole clears LEFT by 1.80 mm, so it opens into the box rather than dead-ending in the socket | pass | |
| lace hole 2.4 mm passes cord_poly_1_0 twice (2.0 mm of cord) | pass | |
| a 2.4 mm hole through 6.0 mm comes out tapered: the beam is a cone, and the cord sees the small end | WARN | |
| FRONT/LEFT: 4 holes over 79 mm, alternating board to board | pass | |
| BACK/LEFT finger count 5 is odd (one program serves both ends) | pass | |
| BACK/LEFT: 4 holes over 79 mm, alternating board to board | pass | |
| BOTTOM/LEFT finger count 5 is odd (one program serves both ends) | pass | |
| BOTTOM/LEFT: 3 holes over 79 mm, alternating board to board | pass | |
| FRONT/RIGHT finger count 5 is odd (one program serves both ends) | pass | |
| lace hole clears RIGHT by 1.80 mm, so it opens into the box rather than dead-ending in the socket | pass | |
| FRONT/RIGHT: 4 holes over 79 mm, alternating board to board | pass | |
| BACK/RIGHT finger count 5 is odd (one program serves both ends) | pass | |
| BACK/RIGHT: 4 holes over 79 mm, alternating board to board | pass | |
| BOTTOM/RIGHT finger count 5 is odd (one program serves both ends) | pass | |
| BOTTOM/RIGHT: 3 holes over 79 mm, alternating board to board | pass | |
| BOTTOM/FRONT finger count 5 is odd (one program serves both ends) | pass | |
| lace hole clears FRONT by 1.80 mm, so it opens into the box rather than dead-ending in the socket | pass | |
| BOTTOM/FRONT: 3 holes over 79 mm, alternating board to board | pass | |
| BACK/BOTTOM finger count 5 is odd (one program serves both ends) | pass | |
| lace hole clears BOTTOM by 1.80 mm, so it opens into the box rather than dead-ending in the socket | pass | |
| BACK/BOTTOM: 3 holes over 79 mm, alternating board to board | pass | |
| no two of 5 parts occupy the same space | pass |
5 panels in baltic_quarter (6 mm), laser, kerf 0.2 mm, cord cord_poly_1_0 (1 mm). Shop: /Users/joel/repos/parametric-studio/shop.py. 15 of 15 checks passed.