Why does blade sharpness drive cutting accuracy?

A dull blade needs pressure, and pressure shifts fabric layers mid-cut — the ragged edge is visible, but the shifted layers are the real accuracy loss. A sharp blade glides with almost none, keeping stacked layers aligned.

What's the change rhythm?

Heavy cutters swap every 2–4 weeks; occasional quilters get months. The rule is the first skip, not a schedule — pushing a dull blade costs accuracy on every cut after.

Replace — sharpeners exist, but re-ground edges tend toward inconsistency and return to skipping. At consumable prices, a fresh precision-ground edge wins.