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3dmodels/change-holder.jscad
Knut Ahlers b4d30fe003
Update some measurements as coins sit a little tight
Signed-off-by: Knut Ahlers <knut@ahlers.me>
2020-07-14 23:28:11 +02:00

76 lines
1.9 KiB
JavaScript

/*
* title : Spare-Change holder
* author : Knut Ahlers
* revision : 0.1.1
*/
const coinCount = 15
const coinDiameters = [
24, // 1 EUR
27, // 2 EUR
]
const coinHeight = 2.8 // Use max coin thickness + a little but less than 2 coins
const fingerDia = 18 // Measure your finger, should be less than the smallest coin diameter
const height = coinCount * coinHeight // Think of something to hold all the coins but not too big
const wall = 1.5 // Something you're comfortable with to print and hold your coin
const blockHeight = () => coinDiameters.sort().reverse()[0] + wall
const blockWidth = () => coinDiameters.reduce((sum, v) => sum + v) + (coinDiameters.length + 1) * wall
const calcMove = (posY, slotDia) => slotDia / 2 + posY
/* exported main */
function main() {
// Create a block containing everything
let obj = cube({ size: [
height,
blockWidth(),
blockHeight(),
], center: true }).translate([0, blockWidth() / 2, 0])
let posY = wall
for (const slotDia of coinDiameters) {
// Remove pipes holding the coins
obj = difference(obj, cylinder({
center: true,
h: height,
r: slotDia / 2,
})
.rotateY(90)
.translate([
wall,
calcMove(posY, slotDia),
blockHeight() / 2 - slotDia / 2,
]))
// Remove finger access to coins
obj = difference(obj, cube({ size: [
height,
fingerDia,
slotDia / 2,
], center: true })
.translate([
0,
posY + slotDia / 2,
blockHeight() / 2 - slotDia / 4,
]))
// Remove one-coin-slot to pull coins out
obj = difference(obj, cube({ size: [
coinHeight,
slotDia,
slotDia / 2,
], center: true })
.translate([
height / -2 + wall + coinHeight / 2,
posY + slotDia / 2,
blockHeight() / 2 - slotDia / 4,
]))
posY += slotDia + wall
}
return obj
}
// vim: set ft=javascript: