Sum explicit panel widths, locate fold lines from a declared edge, and reconcile one identified flat-piece source record without inventing fold allowances or imposition.
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A quick decision brief for this specific tool
Inputs that matter
One identified flat piece, face/order, stock and lot, drawing or dummy revision, exact width/height and unit, descriptive fold family, retained fold code/sequence and instruction source, explicit left/right panel-1 origin, a whole 2–8 panel count, every active source-owned panel width, and an optional complete same-piece independent-span record
Output to expect
Explicit panel-width sum, signed sum-minus-flat-width difference, cumulative fold-line distances from the selected origin, corresponding left-edge coordinates and an optional signed independent-span-minus-panel-sum reconciliation
How it works
Add only the explicit active panel widths, accumulate panels 1 through n for each fold line, mirror the coordinate against flat width when panel 1 starts at the right edge, then report signed differences without applying any invented fold allowance or tolerance
Fold-family labels never create panel widths, tuck reductions, fold order or direction. Preserve the controlling drawing, CIP4/JDF code or measured dummy facts and keep piece, face/order, lot, revision and origin fixed.
No folded-size simulation, panel clearance, foldability, stock suitability, scoring, creep, pagination, printer spreads, bleed/marks, imposition, tolerance, quality acceptance or production release is inferred.
Choose your path
Built around the job you need to finish
Create one source-owned flat-piece panel geometry record by summing explicit widths, locating cumulative fold lines from a declared edge and optionally reconciling a same-piece span, while refusing invented allowances, foldability, imposition, quality and release decisions.
Prepress coordinator transcribing a controlled panel drawing
Preserve unequal panel callouts and exact face/order without an unsupported equal-panel or universal tuck rule.
Identify the piece, stock lot and drawing revision, retain the fold code/sequence and left/right panel origin, enter every active width, calculate and hand the traceable record to the Project.
Can reproduce the panel sum and fold coordinates while tolerance, marks, bleed, imposition, machine setup and release remain external.
Finishing reviewer reconciling a physical dummy
Compare source callouts with one independently measured same-piece flat span without allowing arithmetic to decide source authority or acceptance.
Fix piece, face/order, stock and unit identity, enter source-owned widths, complete all four independent fields, review both signed differences and retain a page-session snapshot.
Gets a reproducible discrepancy record without claims about foldability, panel clearance, scoring, stock suitability, quality or disposition.
Production trainee learning coordinate and workflow boundaries
Understand how panel order, origin, fold sequence, pagination and imposition are separate evidence families.
Load the de-identified example, switch origins and panel counts, trigger inactive-panel, partial-comparison, identity, numeric and boundary errors, then inspect the six nondecisions.
Can explain cumulative geometry and source reconciliation without claiming the Tool generated fold order, booklet pages, creep, marks or production approval.
Authoritative checks for this tool
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
Keep one flat piece, face/order, stock lot, drawing or dummy revision and panel-1 origin together. Preserve the exact fold code or sequence from its source; a fold-family label is descriptive only.
Record basis = one piece + one revision + one face/order + one origin
Sum only explicit panels
Enter every active panel width independently. No letter-fold lead, tuck reduction, caliper compensation or equal-panel rule is supplied by the Tool.
Panel span = Σ active source-owned panel widths
Locate and reconcile
Each fold line is the cumulative distance through the preceding panels from the selected edge. Compare the panel span with the source flat width and, optionally, one independently measured same-piece span.
Fold n = Σ panels 1…n; signed difference = compared span − panel span
Updated: September 2026
Example Scenarios
Transcribe three unequal widths, the left-edge panel order and the drawing revision. Review the two cumulative fold coordinates and the signed panel-sum-versus-flat-width difference before external tolerance review.
Keep the exact stock lot and face identity, enter source callouts, then add a complete independent same-piece flat-span measurement record. A difference is reported without selecting the authoritative source.
Load the de-identified example, switch panel 1 to the right edge and confirm cumulative distances remain measured from that origin while corresponding left-edge coordinates are mirrored.
Common Mistakes to Avoid
✕
Applying one generic allowance to every fold family
✓
Transcribe each panel width and the exact fold code/sequence from the controlling source. Do not infer tuck reductions, order or direction from a family label.
✕
Treating arithmetic equality as production approval
✓
Retain the signed reconciliation as evidence, then keep tolerance, material behavior, scoring, machine setup, proof, quality acceptance and release with the responsible workflow.
FAQ
No. Roll, accordion, gate, parallel and custom are descriptive labels only. Every active width must come from the controlling drawing, specification or measured dummy.
Only that the entered numbers are arithmetically equal on this record. It does not prove measurement accuracy, tolerance compliance, panel clearance, foldability, quality or production acceptance.
Panel numbering is ambiguous without an edge and face/order convention. The origin establishes where panel 1 begins and how cumulative fold-line distances are read.
No. Pagination, printer spreads, signatures, creep, bleed, print marks and sheet imposition are separate jobs with their own explicit settings and accountable tools.
The Tool can report a signed same-piece difference only. The accountable reviewer must resolve source authority, measurement method, tolerance and disposition outside this record.
About Folding Dummy Source Record
A reliable folding dummy starts with the controlling drawing or measured physical piece, not a universal allowance. This record preserves piece, stock, revision, face/order and coordinate origin; adds only explicit panel widths; locates cumulative fold lines; and reports signed differences without deciding tolerances, foldability, imposition or release.
