Leather snap placement allowance calculator

Calculate snap x coordinates and snap positions violating supplied fold clearance with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use snap x coordinates and snap positions violating supplied fold clearance to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Panel width (mm)
200
Snap center edge inset supplied (mm)
15
Required snap count
4
Fold lines x coordinates (mm)
60,140
Supplied minimum snap-to-fold clearance (mm)
10
Snap x coordinates (mm)
[15,71.6666666667,128.333333333,185]
Snap positions violating supplied fold clearance (mm)
[]
Equal center spacing (mm)
56.666667

Try another scenario

Panel width (mm)
200
Snap center edge inset supplied (mm)
15
Required snap count
5
Fold lines x coordinates (mm)
60,140
Supplied minimum snap-to-fold clearance (mm)
10
Snap x coordinates (mm)
[15,57.5,100,142.5,185]
Snap positions violating supplied fold clearance (mm)
[57.5,142.5]
Equal center spacing (mm)
42.5
Calculation method

Calculation method

Snap x coordinates (mm)

J([b+i*(a-2*b)/(c-1) for i in range(c)])

Snap positions violating supplied fold clearance (mm)

J([b+i*(a-2*b)/(c-1) for i in range(c) if min([abs(b+i*(a-2*b)/(c-1)-v) for v in d] or [a])<e])

Equal center spacing (mm)

(a-2*b)/(c-1)

Symbols and units
a
Panel width (mm)
b
Snap center edge inset supplied (mm)
c
Required snap count
d
Fold lines x coordinates (mm)
e
Supplied minimum snap-to-fold clearance (mm)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • One straight row evenly spaced between supplied edge insets. Width≥2×inset, minimum two snaps. Supplied hardware clearances only, no pull-out/strength assessment. Supported limits: All numeric inputs must be finite. Only the explicitly described mathematical scenario is supported.
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