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ajandClaude Opus 5.5
1fbe57a841
PEP stores 3/16 as 0.188, which missed the machine's 0.1875 at the 0.0005 in tolerance; widen it to 0.001 in, still far below gauge steps. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
45 lines
2.2 KiB
Markdown
45 lines
2.2 KiB
Markdown
# Machine cutting defaults
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A nest's assigned machine (`Nest.Machine`, see [nest file format](nest-file-format.md))
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supplies the starting lead-ins, lead-outs, kerf and cut-off settings for the nest's
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material and thickness, from that machine's Tools > Machine Configuration entry.
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`MachineCuttingDefaults` (OpenNest.Data) holds the mapping; the desktop applies it.
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## Lookup
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The machine's material must match the nest's material name, and its grade when the nest
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has one (otherwise the first grade on file). The thickness matches within 0.001 in after
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converting the nest's thickness to the machine's units, so a thickness rounded to three
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decimals (PEP stores 3/16 as 0.188) finds the machine's 0.1875; the nearest one wins. With no match, or no machine on
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file, nothing changes and the previous behavior applies. Lengths are converted from the
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machine's units to the nest's.
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## Lead-ins and lead-outs
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A plate with no cutting parameters of its own (Plan Cutting, Place Lead-in) starts from the
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last applied parameters, as before, with the machine's leads and kerf laid over them and the
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machine, material, grade and thickness recorded on the parameters. A plate that already has
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parameters keeps them: changing the machine, material or thickness does not rewrite leads
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the plate was planned with.
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The machine holds one lead-in and one lead-out per thickness; both go to external and internal
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contours (internal covers full circles). Types map as follows:
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| Machine type | Lead-in |
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|---|---|
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| None | none |
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| Line | line (length, angle) |
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| Arc | arc (radius) |
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| Line + Arc | line-arc (length, radius, angle) |
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| Clean Hole | clean hole (length, radius, the thickness's kerf), holes only: the external lead-in is kept |
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| Line + Line | not mapped (the configuration has no second segment): every lead-in is kept |
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Lead-outs map None, Line (length, angle) and Arc (radius); any other type is none.
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## Cut-offs
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The plate view's part clearance, overtravel, minimum segment length and direction come from
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the machine's cut-off settings when a nest opens, when Nest > Machine changes the machine and
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after Nest > Edit saves. The head-locked overcut choice is kept. Existing cut-offs are not
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regenerated at that moment; they follow the settings the next time they regenerate.
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