Factory Acceptance Test Documentation — How to Structure FAT Records That Protect Your Warranty

A Factory Acceptance Test (FAT) is one of the most critical stages in any roll forming machine purchase.

But the test itself is not enough.

What truly protects you long-term is:

Structured, measurable, and contract-linked FAT documentation.

Many warranty disputes occur because:

• FAT was informal

• Measurements were not recorded

• No dimensional reports were saved

• Speed claims were not verified

• Component brands were not documented

• PLC parameters were not backed up

When a failure occurs months later, there is no baseline proof.

This guide explains:

• What proper FAT documentation should include

• How FAT protects warranty claims

• The most common FAT mistakes

• How to structure a FAT file for long-term protection

• What investors and insurers look for

In industrial machinery, documentation equals leverage.

What Is Factory Acceptance Testing (FAT)?

Factory Acceptance Testing is conducted:

• At the manufacturer’s facility

• Before shipment

• Before final payment

• After machine build completion

Its purpose is to confirm:

• Mechanical performance

• Electrical function

• Speed capability

• Profile dimensional accuracy

• Punching precision

• Safety system functionality

But without documentation, FAT loses protective value.

Why FAT Documentation Protects Warranty

FAT documentation:

1. Establishes performance baseline

2. Confirms specification compliance

3. Verifies contract alignment

4. Documents component brands

5. Confirms speed capability

6. Records dimensional tolerances

7. Strengthens future warranty claims

Without FAT records, disputes become opinion-based.

With FAT records, disputes become evidence-based.

Core Elements of Proper FAT Documentation

1. Contract Reference Page

The FAT file should begin with:

• Contract number

• Machine model

• Profile type

• Gauge range

• Speed specification

• Delivery terms

Every test result should reference contract obligations.

2. Mechanical Verification Records

Document:

• Shaft diameter measurement

• Stand alignment check

• Roll tooling verification

• Bearing brand confirmation

• Gearbox rating plate photo

• Motor power rating

Photographic evidence is critical.

3. Performance Speed Test

Record:

• Maximum tested speed

• Continuous operating speed

• Gauge used during test

• Coil width

• Material grade

Do not accept “the machine can reach 40 m/min” without measurable test documentation.

Speed must be recorded under realistic load.

4. Dimensional Accuracy Report

For each profile tested:

• Panel width

• Rib height

• Leg length

• Punch position accuracy

• Cut length tolerance

• Squareness

Measured with calibrated tools.

Signed by both parties if possible.

5. Punching System Verification

If machine includes punching:

• Punch alignment measurement

• Hole diameter verification

• Punch repeatability check

• Timing accuracy

Punch disputes are common — documentation prevents ambiguity.

6. Hydraulic System Data

Record:

• Hydraulic pressure

• Temperature during operation

• Pump model and rating

• Hose condition

• Leak check confirmation

Hydraulic failures often occur within first 12–18 months.

Baseline pressure data strengthens claims.

7. Electrical System Documentation

Include:

• PLC brand and model

• Servo drive brand

• Electrical cabinet wiring photos

• Grounding confirmation

• Voltage and frequency tested

• Safety relay confirmation

Electrical instability is a frequent warranty rejection reason.

FAT documentation helps eliminate ambiguity.

8. PLC Backup File

Before shipment:

• Backup PLC program

• Store securely

• Confirm software version

If parameters are later disputed, original baseline is critical.

Common FAT Documentation Mistakes

• Only video recordings

• No dimensional measurement report

• No written speed verification

• No material grade confirmation

• No component serial number records

• No signed confirmation

• No independent measurement

Video alone is not structured evidence.

FAT vs Pre-Shipment Inspection

FAT:

• Conducted by manufacturer

• Confirms production capability

Pre-Shipment Inspection:

• Often independent

• Confirms contract compliance

Both are valuable.

But FAT documentation must be structured.

Real Case Example — Poor FAT Documentation

Buyer relied on short demonstration video.

No dimensional report recorded.

After delivery:

• Panel width inconsistent

• Supplier claimed “installation issue”

Buyer had no documented baseline.

Warranty dispute extended for weeks.

Real Case Example — Strong FAT Documentation

Buyer insisted on:

• Full dimensional test report

• Continuous speed verification

• Hydraulic pressure log

• Signed FAT document

After 9 months, speed instability occurred.

Buyer presented FAT speed documentation.

Supplier accepted warranty claim without dispute.

Documentation reduced conflict.

FAT and Investor Due Diligence

Investors reviewing roll forming operations will assess:

• FAT documentation quality

• Performance baseline

• Maintenance alignment with FAT

• Commissioning consistency

Strong FAT records increase confidence in asset integrity.

FAT and Insurance Claims

If machinery breakdown insurance is in place:

Insurers may request:

• Original FAT documentation

• Baseline operating data

• Component specification confirmation

Proper FAT file strengthens insurance approval.

Recommended FAT Documentation Structure

Create a dedicated FAT file including:

1. Contract reference sheet

2. Mechanical inspection checklist

3. Speed test report

4. Dimensional accuracy report

5. Punch test report

6. Hydraulic test log

7. Electrical inspection sheet

8. PLC backup confirmation

9. Photo documentation folder

10. Signed FAT approval form

Store digitally and physically.

How FAT Protects Long-Term Warranty

When failure occurs:

• Compare performance to FAT baseline

• Compare speed data

• Compare hydraulic pressure

• Compare electrical parameters

Deviation indicates potential defect.

No baseline = no leverage.

Frequently Asked Questions

Is video proof enough for FAT?

No — written, measurable documentation is required.

Should FAT include dimensional measurement?

Absolutely.

Does FAT protect against warranty rejection?

Yes — when structured properly.

Should buyer attend FAT in person?

Strongly recommended for high-value machines.

Can FAT documentation help insurance claims?

Yes — insurers value baseline records.

Should FAT be signed?

Yes — signed confirmation strengthens enforceability.

Final Conclusion

Factory Acceptance Testing is not just a formality.

It is your first line of warranty defense.

But only if properly documented.

In roll forming machine purchases, structured FAT documentation:

• Protects against performance disputes

• Reduces warranty ambiguity

• Strengthens insurance claims

• Preserves resale value

• Protects investor confidence

The smartest buyers do not just watch the machine run.

They measure it, record it, verify it, and archive it.

Because when something fails months later, documentation — not memory — determines outcome.