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.
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.
FAT documentation:
Establishes performance baseline
Confirms specification compliance
Verifies contract alignment
Documents component brands
Confirms speed capability
Records dimensional tolerances
Strengthens future warranty claims
Without FAT records, disputes become opinion-based.
With FAT records, disputes become evidence-based.
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.
Document:
Shaft diameter measurement
Stand alignment check
Roll tooling verification
Bearing brand confirmation
Gearbox rating plate photo
Motor power rating
Photographic evidence is critical.
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.
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.
If machine includes punching:
Punch alignment measurement
Hole diameter verification
Punch repeatability check
Timing accuracy
Punch disputes are common — documentation prevents ambiguity.
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.
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.
Before shipment:
Backup PLC program
Store securely
Confirm software version
If parameters are later disputed, original baseline is critical.
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:
Conducted by manufacturer
Confirms production capability
Pre-Shipment Inspection:
Often independent
Confirms contract compliance
Both are valuable.
But FAT documentation must be structured.
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.
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.
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.
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.
Create a dedicated FAT file including:
Contract reference sheet
Mechanical inspection checklist
Speed test report
Dimensional accuracy report
Punch test report
Hydraulic test log
Electrical inspection sheet
PLC backup confirmation
Photo documentation folder
Signed FAT approval form
Store digitally and physically.
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.
No — written, measurable documentation is required.
Absolutely.
Yes — when structured properly.
Strongly recommended for high-value machines.
Yes — insurers value baseline records.
Yes — signed confirmation strengthens enforceability.
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.
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