Undersized

kerfmaster pin list · Definitions

rulingA decision by Aristide or Jordan. True because it was decided; it can be superseded, but it cannot be stale.

Content last changed 2026-08-02 — computed from the item itself, not typed.

Undersized = a bridge, tab, slug-retention tab or any other narrow web that measures narrower than the table minimum for that material and thickness. It is a measurement against our table, not a judgement about the customer's file.

What we do about it — Jordan's rule

• If the customer's file already has bridges, leave them alone. Only flag and suggest when one falls under the table minimum. Never silently re-cut a bridge that is in spec.
• For bare text and unbridged islands, we calculate both positions and widths — there is nothing of the customer's to preserve.
• The minimum applies to any narrow web, spacing included.
• An undersized flag never moves geometry by itself. The proposal is drawn on the CM_BRIDGE_ADJUST layer — the wider web and a tick at each wall's new position — and a human decides.

Measured example — the novi sign

91 contours, 92 narrow webs: 73 real bridges holding 46 islands, 0 unbridged. Of those, 10 measured under table — 59/63/64/73/74/75/75 thou in text against an 80 thou minimum, and 113/115/121 thou on the big art island against 125. A further 9 narrow webs under 80 thou were spacing, not bridges, including the 23.3 thou U–T gap, which is the narrowest of the nine (23.3 / 34.3 / 52.8 / 58.1 / 65.9 / 67.6 / 68.0 / 72.2 / 79.0). Re-measured 2026-08-02 at HEAD 0ded91a; the 10 under-table widths are 59.0 / 63.3 / 64.4 / 73.0 / 74.2 / 75.0 / 75.5 in text and 113.5 / 115.1 / 120.6 on the art island, all at the board’s 0.060 thickness setting.

Undersized is not the same as defective. It means our table wants more material there than the file has, on this material and thickness. Change the material and the same geometry may be fine.