Medium-Gauge CTL Acceptance Specification
A narrow medium-gauge CTL acceptance specification for thickness, yield strength, leveler capacity, feed length, shear type, flatness, stacking, FAT/SAT records, and CT model routing.
A medium-gauge CTL line should be specified by acceptance records, not by a broad promise of precision. The buyer and supplier need to freeze thickness, yield strength, coil width, coil weight, leveler capacity, feed length tolerance, shear type, flatness, surface handling, stacking, FAT/SAT records, and commissioning evidence before the equipment path is accepted.
This page is a narrow support page for medium-gauge CTL acceptance specification in the MaxDo topic network. It owns only the specification layer: thickness, yield strength, coil width, leveler capacity, feed length tolerance, shear type, flatness, surface handling, stacking, FAT/SAT records, commissioning evidence, and CT model routing. It is not the main cut-to-length process page and not a CTL supplier acceptance matrix. For the general operating sequence, use the cut-to-length process station acceptance map. For project handoff data, use the CTL engineering handoff checklist. This page focuses on the specification details that decide whether a medium-gauge CTL line can be accepted.
Define the Medium-Gauge Boundary
Medium gauge should be defined by processing load, not only by a thickness label. Record material grade, yield strength range, tensile strength, thickness range, coil width, coil ID and OD, maximum coil weight, surface condition, and expected job mix. A line that handles one easy grade at a middle thickness may still fail if the real order mix includes higher-strength material or wider coils.
| Specification item | Acceptance record | Risk if vague |
|---|---|---|
| Thickness and strength | Grade, yield range, tensile range, thickness family | Under-sized leveler, drive, or shear |
| Coil condition | Width, weight, ID/OD, surface, coating, oil | Loading, marking, or handling problems |
| Output target | Sheet length, tolerance, flatness, stack form | Accepted machine but rejected product |
| Job mix | Monthly tonnage by grade and length family | Wrong model or wrong option package |
Accept the Leveler Before Speed Claims
For medium-gauge CTL work, the leveler is often the quality gate. Acceptance should define incoming coil condition, target flatness, leveler adjustment range, roller condition, setup method, and how flatness will be measured. If flatness is not measured under agreed material and speed conditions, the line speed claim is not enough evidence.
For choosing whether a project is light or medium gauge, use the light vs medium gauge CTL selection boundaries. For thickness conversion before RFQ, use the gauge thickness chart.
Specify Feed Length and Shear Acceptance Together
Feed length tolerance and shear timing must be accepted together. The record should include programmed length, measured length, sample quantity, measuring tool, production speed, acceleration setting, encoder feedback, shear mode, blade condition, and restart behavior. A length test done without the agreed speed, material, and shear condition does not prove production acceptance.
For controller-level evidence, connect this specification to the servo roll feed controller acceptance checklist. For line-level automation records, use the automated metal processing system map.
Make Stacking Part of the Specification
Medium-gauge sheets can pass length and flatness checks but still fail production if stack quality is poor. Specify stack height, pallet or table format, sheet alignment, surface protection, conveyor release, static or friction risk, inspection access, and forklift or crane path. Stacking should be inspected as part of CTL acceptance, not treated as a packaging afterthought.
| Output check | How to accept it | Record owner |
|---|---|---|
| Length tolerance | Repeated sample set at agreed speed and material | Quality and controls |
| Flatness | Measurement method defined before FAT | Quality and mechanical |
| Squareness | Diagonal check on agreed sheet sizes | Quality |
| Stack quality | Alignment, surface, release, and handling inspection | Production and quality |
Turn FAT and SAT Into Specification Proof
FAT should prove the specification under controlled conditions before shipment. SAT should prove the same requirements on the buyer’s site with real utilities, handling paths, operators, and material. Each deviation should have an owner, correction plan, and closeout record. Without this discipline, medium-gauge CTL acceptance can become a subjective discussion after the machine is already installed.
- Freeze material grade, strength range, thickness, coil width, coil weight, and sheet length families.
- Define leveler, feed, shear, flatness, squareness, surface, and stacking acceptance records.
- Attach the measuring method, sample quantity, test speed, and test material for FAT and SAT.
- Record deviation ownership, correction timing, training, spare parts, and final sign-off.
Route the Specification to CTL Product Paths
After the medium-gauge specification is stable, route the project to the metal cut-to-length line category. Narrow or lighter medium-gauge projects may begin with CT-850. Mid-width medium-gauge work often maps to CT-1350. Wider coil programs should compare CT-1650.
If the same investment is being compared with slitting economics, use the slitting vs CTL ROI decision record. For supplier evidence, use the CTL supplier acceptance matrix. To ask MaxDo to review a medium-gauge CTL specification, send the material range, coil data, sheet length target, flatness target, stacking method, FAT/SAT plan, and site constraints through the contact form.
If the acceptance target changes from flat sheet to slit coil, keep this page as the medium-gauge CTL acceptance specification and route the equipment comparison to the metal slitting machine category. The slitting route should carry strip-width, burr, recoiling, and edge-quality evidence instead of CTL flatness and stacking records.
