Slitting Width Tolerance Measurement Protocol
A narrow slitting width tolerance measurement protocol covering sampling points, gauges, burr, camber, setup drift, FAT/SAT records, and corrective actions.
This page is a narrow support page for slitting width tolerance measurement. It owns only the measurement protocol: sampling point, measuring tool, burr condition, camber check, setup drift, FAT/SAT record, and corrective-action trigger. It is not the main metal slitting line core page, not the high precision technology overview, and not a model selection page.
Slitting width tolerance is useful only when it can be measured the same way by the buyer, operator, and supplier. A tolerance claim such as +/-0.05 mm or +/-0.10 mm should define the strip program, material, measuring tool, sampling location, sampling frequency, burr condition, camber check, and action rule when the value drifts.
This page is the width-tolerance measurement protocol in the MaxDo topic network. For the broader technology stack behind tight tolerances, use the high precision slitting technology support page. For RFQ and FAT/SAT language, use the verified slitting precision and width tolerance guide. This page focuses on how to measure, record, and correct width tolerance in production.
Define the Width Tolerance Before Measuring
A measurement protocol should state the nominal strip width, allowed deviation, number of slit strips, material grade, thickness, coating, target burr, coil width, trim allowance, and downstream use. A tolerance for narrow stainless strip going into stamping is not the same as a tolerance for wider construction strip. For material intake, use the MD series material compatibility checklist.
| Protocol item | What to write down | Why it matters |
|---|---|---|
| Nominal width | Each finished strip width and tolerance band | Prevents a generic accuracy claim from replacing the real strip program |
| Material state | Grade, thickness, strength, coating, surface sensitivity | Material behavior changes burr, springback, and tracking |
| Measuring method | Tool, calibration, sampling point, operator, record format | Makes supplier and buyer results comparable |
| Action rule | When to adjust knives, tension, speed, separator, or recoiler | Turns measurement into production control |
Measure at the Right Sampling Points
Do not measure only the first strip after setup. A practical protocol checks first-piece approval, early running stability, mid-coil drift, end-of-coil behavior, and any strip that shows burr, camber, wave, or telescoping risk. Record left, center, and right positions across the coil when multiple strips are produced from one master coil.
The process context still matters. Use the metal slitting line process guide to connect width checks to decoiling, slitting, separating, tensioning, and recoiling. If the main issue is yield loss rather than measurement repeatability, use the slitting scrap process loss map.
Separate Width Error From Burr and Camber
A strip can be within width tolerance but still fail because burr, camber, edge wave, or surface damage makes it unusable downstream. Record width, burr height, camber, edge condition, and coil build as separate fields. This prevents one acceptable number from hiding a different quality problem.
If deformation or shape instability is the main complaint, use the slitting deformation control checklist. If the buyer is still deciding whether output should be slit strip or flat blank, use the slitting vs blanking decision map.
Convert Measurement Drift Into Corrective Action
Width drift should trigger a defined response. Random adjustment can make the next coil worse. The correction path should check knife clearance, spacer stack, blade wear, arbor alignment, strip tension, separator pressure, recoiling tension, line speed, and measuring-tool calibration in a fixed order. For control upgrade planning, review the slitting line control system upgrade roadmap.
| Finding | Likely check | Corrective action |
|---|---|---|
| All strips wide or narrow by a similar amount | Spacer stack, knife setup, measuring tool calibration | Recheck setup against nominal strip program before running volume |
| Only edge strips drift | Trim allowance, edge wave, coil tracking, separator setup | Adjust entry guidance, trim plan, and separator pressure |
| Width changes during the coil | Tension, blade heat, wear, speed, coil tracking | Review tension recipe, speed, blade condition, and mid-coil sampling |
| Width is correct but downstream feed fails | Burr, camber, coil build, edge condition | Measure related quality fields before changing width setup |
Use the Protocol in FAT, SAT, and Production
Factory acceptance testing should use the buyer’s target material or a documented equivalent. Site acceptance testing should repeat the same measurement method after installation. Production checks should keep the same fields so the plant can compare first-piece approval, shift records, complaint records, and maintenance actions without changing definitions.
- Define nominal width, tolerance band, strip count, trim, material, and thickness before testing.
- Use calibrated calipers, micrometers, or inline width measurement with a stated resolution.
- Measure first piece, early run, mid-coil, end-coil, and any strip with visible edge or coil-build risk.
- Record width, burr, camber, edge condition, recoiling condition, operator, time, and line speed.
- Define the corrective-action order before approving FAT, SAT, or production release.
Route Width Tolerance Requirements to Equipment
After the measurement protocol is clear, compare the metal slitting machine category. Narrow or light-gauge work may begin with MA-850. Mid-width projects can compare MA-1350. Wider coil programs should evaluate MD-1650 y MD-2200 against the actual strip program.
For model selection across the MA and MD range, use the MA and MD slitting machine model fit matrix. To ask MaxDo to review a width-tolerance protocol, send the material grade, thickness, coil width, strip widths, tolerance target, burr limit, camber limit, measurement method, and acceptance plan through the contact form.
