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Units of measure
Positions and distances obey the system’s integer-dimension convention. The active unit mode
determines how a value is interpreted:
| UOM mode | Meaning | Stored as |
|---|---|---|
| 1 | Metric | mm × 100 (hundredths of a mm) |
| 2 | Imperial decimal | 64ths of an inch |
| 3 | Imperial fraction | 64ths of an inch |
| 4 | Feet | 64ths of an inch (feet shown for display) |
Width/height adjustments handed to the notching engine come pre-computed in both systems:
metric in mm/100 and imperial in 64ths. Each operation’s position is then stored in the active
unit and re-formatted per-UOM for the BOM text.
Position expressions and tokens
The position rules (X / Y / Z and the centre adjustment) accept an expression in the
rule’s description, not just a fixed number. Before the expression is evaluated, these tokens
are substituted with live values:
| Token | Substituted with |
|---|---|
WADJ |
Width adjustment for this part (converted to the active unit). |
HADJ |
Height adjustment for this part. |
WMAT / HMAT |
Matrix-derived width / height adjustment (looked up from a costing/adjustment matrix). |
M1 / M2 / M3 |
Design/option parameters carried on the unit. |
After substitution, arithmetic is evaluated — e.g. WADJ + 5 or
M1 * 0.5 — to yield the final coordinate in the active unit.