Here’s a comprehensive checklist you can use when inspecting and preparing to purchase a Enshu ES450 CNC Vertical Machining Centre (Japan-made) — covering pre-purchase inspection, logistics & delivery, and installation & commissioning.

1. Pre-Purchase Inspection

1.1 Verify Model, Specifications & Documentation

• Confirm that the machine is Enshu ES450, manufactured in Japan.
• Typical specifications:
  • Travel (X/Y/Z): 650 × 450 × 460 mm
  • Table size: 800 × 450 mm
  • Spindle speed: up to 12,000 rpm
  • Tool magazine: 20 tools (standard)
  • Machine weight: approx. 7,000 kg
• Record serial number, year of manufacture, control unit model (often FANUC 18i-MB or Oi-MB), and total spindle hours.
• Request service history and maintenance logs. Machines with consistent lubrication and scheduled ball-screw inspections have significantly longer life spans.

1.2 Structural & Mechanical Condition

• Inspect table surface and T-slots for dents, corrosion, or deep scratches.
• Move X/Y/Z axes across full travel range; listen for irregular sounds, check backlash or step errors.
• Examine guideways and ball screws for wear or pitting — ES450 uses LM linear guideways, which require smooth, consistent motion.
• Check spindle run-out using a test bar; any noticeable vibration or noise may indicate bearing fatigue.
• Inspect ATC (Automatic Tool Changer):
  • Check arm alignment, carousel indexing, and smooth tool change cycles.
  • Verify the number of stations (20/30 tools).
• Evaluate auxiliary systems: coolant pumps, chip conveyors, hydraulic clamps, lubrication lines.

1.3 Performance & Accuracy

• Request a test cut: observe surface finish, dimensional accuracy, and cycle stability.
• Measure positioning and repeatability according to ISO 230-2 (or use a laser interferometer).
• Check rapid traverse rates: around 48 m/min (X/Y) and 36 m/min (Z) should be normal.
• Inspect for signs of previous crashes or column misalignment.
• Review controller logs for alarms or axis errors.

1.4 Electrical, Control & Software

• Verify voltage and phase: usually 200–220 V, 3-phase, 50/60 Hz.
• Open the electrical cabinet: check for burnt connectors, modified cables, or retrofitted drives.
• Confirm controller functionality (FANUC, Mitsubishi, etc.): monitor responsiveness, alarm history, and available spare ports.
• Check if optional upgrades exist: through-spindle coolant, 4th axis interface, spindle chiller, or tool load monitoring.

1.5 Ownership & Documentation

• Ensure legal ownership and serial number match invoices and nameplates.
• Ask for a parts list, electrical diagram, and parameter backup file.
• Confirm that the machine was properly decommissioned — spindle and ATC should be locked, axes in home position.

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2. Logistics, Transport & Delivery

• Machine weight: approximately 7.0 t — confirm your transport capacity.
• Lock the spindle and ATC arm before loading.
• Secure all moving parts with mechanical locks or foam blocks.
• Use moisture-proof wrapping and rust-preventive spray for overseas shipping.
• Verify access width and floor load rating at your installation site.
• Arrange rigging, forklifts, and cranes suitable for the machine’s footprint (~2.6 × 2.8 m).
• Prepare foundation drawings and ensure flatness within ±0.02 mm/m.

Electrical preparation:

• 200–220 V AC, 3 phase, 40 A circuit recommended.
• Stable air pressure 0.5–0.6 MPa for tool clamp/hydraulic systems.
• Install power stabilizer and surge protection to protect the controller.

3. Installation & Commissioning

Step 1 — Leveling and Anchoring

• Level the base using precision spirit level (0.02 mm/m).
• Secure anchor bolts once the bubble stays centered in all axis directions.

Step 2 — Axis Alignment

• Check squareness between X/Y axes and perpendicularity of spindle to table.
• Verify backlash values are within 0.005 mm tolerance.

Step 3 — System Setup

• Reconnect lubrication lines and verify oil flow to guideways.
• Fill coolant tank and check coolant return lines for leaks.
• Power up controller and confirm parameter loading.

Step 4 — Functional Testing

• Home all axes and test soft limit operation.
• Run warm-up cycles: 30 min at incremental spindle speeds (1,500 → 6,000 → 12,000 rpm).
• Test ATC change cycle, coolant on/off, and emergency stop functionality.
• Perform a cutting test to confirm dimensional accuracy and chatter-free operation.

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4. Value, Risks & Commercial Factors

Evaluation Area	Key Considerations
Spindle Health	Check vibration spectrum, noise, heat after 15 min idle run.
Guideways & Screws	Replace lubrication oil and clean LM rails before use.
Controller Age	FANUC 18i-MB units are serviceable; older versions may lack parts.
Tool Magazine	Inspect ATC arm claws and Geneva indexing cam.
Electrical Components	Check Yaskawa/Servo drives for overheating or replaced boards.
Market Value	Typical resale value (2025): USD 20 000–35 000 depending on hours and condition.
Support	Enshu Japan still provides documentation and limited parts support for ES-series models.

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5. Final Checklist Before Purchase

• Verify model, serial number, YOM, control system.
• Inspect table, guideways, and spindle taper.
• Test axes travel, backlash, and noise.
• Run spindle and ATC cycles.
• Review service records and control logs.
• Confirm voltage and air supply compatibility.
• Inspect coolant and lubrication systems.
• Verify transport and installation readiness.
• Perform leveling and accuracy test after setup.
• Define maintenance intervals and backup parameters.