CTL Buyer First-Scope Checklist
A CTL buyer first-scope checklist for sheet output, material envelope, length tolerance, flatness, leveler, shear, stacking, FAT/SAT records, plant constraints, and CT model routing.
A first CTL inquiry should not begin with a generic request for a cut-to-length line. The buyer should first define sheet output, material envelope, coil data, length tolerance, flatness target, shear and stacking needs, plant constraints, FAT/SAT evidence, and the CT model path that fits the real production burden.
This page is the CTL buyer first-scope checklist in the MaxDo topic network. For the station-by-station process, use the cut-to-length process station acceptance map. For engineering handoff details, use the CTL engineering handoff checklist. For medium-gauge technical acceptance, use the medium-gauge CTL acceptance specification. This page focuses only on the first buyer scope before RFQ.
Confirm the Output Is Sheet, Not Strip
CTL lines produce flat sheets or blanks from coil. Slitting lines produce narrow coils. Before comparing equipment, confirm whether the downstream process needs sheet length, stack quality, flatness, and squareness, or whether it needs continuous strip feed. If the team is still deciding, use the slitting vs CTL ROI decision record.
| First-scope question | What to write down | Why it matters |
|---|---|---|
| Output form | Flat sheets, blanks, or both sheet and strip workflow | Prevents buying the wrong process type |
| Sheet program | Sheet length families, width, tolerance, stack format | Defines feeder, shear, and stacking requirements |
| Downstream use | Press, laser cutting, fabrication, construction, appliance, service center | Determines flatness, surface, and stack acceptance |
Freeze the Coil and Material Envelope
The first CTL scope should record material grade, thickness range, yield strength, tensile strength, coating, surface sensitivity, coil width, coil weight, coil ID and OD, incoming coil condition, and expected job mix. A line sized around one easy sample may fail the real production mix.
If the buyer uses gauge language, convert gauge to real thickness with the gauge thickness chart. For light and medium-gauge boundaries, review the light vs medium gauge CTL selection boundary.
Define Length, Flatness, Squareness, and Stack Quality
A CTL buyer scope should treat the finished sheet as the commercial product. Record target sheet lengths, length tolerance, flatness target, squareness, surface condition, burr or shear edge requirement, stack height, stack alignment, pallet or table format, and handling route. Do not accept length alone if flatness or stack quality will decide downstream use.
| Output field | Acceptance evidence | Owner |
|---|---|---|
| Length tolerance | Measured sheet samples at agreed speed and material | Quality and controls |
| Flatness | Measurement method, sample size, and target condition | Quality and mechanical |
| Squareness | Diagonal check on agreed sheet sizes | Quality |
| Stack quality | Alignment, surface, release, and handling inspection | Production and quality |
Choose Leveler, Feed, Shear, and Stacking Scope
The buyer does not need to design every component, but the first scope should describe what each station must prove. The leveler must match material strength and flatness target. The feed and measuring system must match length tolerance. The shear must match thickness, edge condition, and speed. The stacker must protect surface quality and downstream handling.
For servo feed and controller evidence, use the servo roll feed controller acceptance checklist. For automation records, use the automated metal processing system map.
Map the Plant Before Sizing the CTL Line
A CTL line must fit the site. Record floor space, foundation, power supply, crane or forklift route, coil staging, sheet transfer, stack removal, operator access, safety guarding, maintenance clearance, installation window, and commissioning target. Plant constraints can change whether the buyer should begin with CT-850, CT-1350, or CT-1650.
Build FAT and SAT Into the First RFQ
The first RFQ should explain how the CTL line will be accepted. FAT should prove the agreed sheet program before shipment. SAT should repeat the same checks on site with the buyer’s utilities, operators, material handling route, and real material. Each deviation should have an owner, correction plan, retest method, and final sign-off.
- Freeze material grade, thickness, coil width, coil weight, sheet length families, and downstream use.
- Define length tolerance, flatness, squareness, surface condition, stack quality, and sample count.
- Record leveler, feed, shear, stacking, operator training, spare parts, and deviation closeout.
Route the First Scope to CTL Product Paths
After the first scope is stable, route the project through the metal cut-to-length line category. Narrow or lighter sheet programs may begin with Cutlength-850. Mid-width CTL projects can compare CT-1350. Wider or heavier sheet programs should evaluate CT-1650.
To ask MaxDo for a first CTL scope review, send the material envelope, coil data, sheet output program, length and flatness targets, stack requirement, plant constraints, FAT/SAT plan, and preferred CT model boundary through the contact form.
