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CALCULATORS / SHEET METAL, FORMING AND WIRE

Wire feed, cut length and production rate calculator

Constant feed time for supplied straight and bend-centerline lengths.

sheet-metal-wire-feed.napkin / editable
✓ checks pass

SCENARIO COMPARISON

Compare the numbers.

This source describes an analytical model. Its quantities and checks are the view.

Scenariototalmmdurations
1202.4
1002

All calculated quantities are listed with the inputs. Switch to Source to inspect the equations.

SCENARIOS / CALCULATED VALUESSAME SOURCE

Change an input to see the consequences.

feed time budget2.40 s✓ passes

BASELINE INPUTS

CALCULATED

total120 mm
duration2.4 s

Edits change the baseline source.

Calculated from your source · not saved
Baseline · Baseline
feed time budget2.40 s ✓ passes
alternative · alternative
feed time budget2.00 s ✓ passes

Illustrative first-order example. Checks are editable requirements, not design standards. The broader topic may require additional equations, data, and validation.

Formula and units

This example uses the following equations. Input names and units match the editable source above.

total
total = straightLength+bendLength [mm]
duration
duration = total/feedSpeed [s]

Original worked example

These are the baseline values in the downloadable source. Edits above let you test your own values.

Given

straight length
100 mm
bend length
20 mm
feed speed
50 mm/s

Calculated

total
120 mm
duration
2.4 s

Assumptions and limits

Constant feed time for supplied straight and bend-centerline lengths.

The requirement checks use the limits written in this example. Passing a check does not establish that the model covers every load, material behavior, or operating condition in a real design.

Download this .napkin example ↓

Take it further with your agent

Napkin keeps the inputs, equations, checks and assumptions together in one study. Your agent sets it up; you change the numbers.

Try with Claude ↗

codex 'Use Napkin (https://napkin.engineering/mcp, or the local Napkin plugin) to build a study: Wire feed, cut length and production rate. Inputs: feed speed; part length; cuts per cycle; shaft speed. Outputs: parts/min; required feed and cut timing. Model scope: Specified bend geometry and calibrated material/process factors. Read napkin_capabilities and the current snapshot. Ask me for the values that matter, label assumptions with units, author .napkin source, validate it and apply it with napkin_source using the current revision, then open the study. Add checks for the limits I supply. Keep unsupported analyses explicit.'

Claude needs the Napkin connector; Codex needs the Napkin plugin. Set up your agent ↗

The broader study

The topic brief below describes the broader scope. The worked example above states the particular calculation it implements.

  • Inputs: feed speed, part length, cuts per cycle, shaft speed
  • Outputs: parts/min, required feed and cut timing
  • Modes: calculate, compare, sweep
  • Drawing: Flat pattern and forming sequence

EXECUTABLE WORKED EXAMPLE · FIRST-ORDER MODEL · CHECK THE SCOPE & ASSUMPTIONS

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