When evaluating a used Rollomatic Shapesmart NP4 CNC tool grinder, you want to ensure precision, reliability, and ease of ongoing maintenance. Below are key areas to inspect along with common failure points to look out for.

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Key Inspection Areas

1. Machine & Usage History
   • Check machine serial number and compare to documentation.
   • Review total operating hours and workload types (are they grinding many similar tools, or constantly switching shapes?).
   • Maintenance logs: how often was it serviced, calibrated, repaired.
2. Spindle / Grinding Wheel Condition
   • Examine the spindle for run-out, vibration, unusual noise.
   • Inspect wheel mounts, adapters, balancing.
   • Check condition of grinding wheels (flatness, wear, glazing).
   • Are spare wheels / accessories still available for this model?
3. Feed Drives / Linear Systems
   • The NP4 uses precision linear motors / high-accuracy guides. Check for wear, backlash, or drift in all axes.
   • Inspect ball screws (if any), linear rails, slide wear.
   • Check motor encoders and feedback systems for proper calibration.
4. Coolant System & Cooling Circuits
   • Coolant filtration, pumps, delivery to the grinding wheel surface.
   • Cooling of spindle bearing, coolant supply leak risk.
   • Cleanliness of the fluid, free of debris or metal dust.
5. Control System & Software
   • Rollomatic control interface: version, firmware, usability.
   • Software compatibility: do you have the required tool profiles / shapes loaded, are backups available.
   • Safety interlocks, emergency stop, protective shields.
6. Accuracy & Test Grinding
   • Perform a test grind or make a trial shape to verify wheel path accuracy, dimensional tolerances, shape accuracy.
   • Surface finish test: verify sharpness, burr formation, consistency.
   • Check radial and axial run-out on the smallest diameter tools you might use.
7. Electrical / Power Infrastructure
   • Ensuring proper power supply: voltage stability, grounding, lack of electrical noise or interference.
   • Look for signs of overheating, capacitor or drive module repairs.
8. Spare Parts & Consumables
   • Rods, wheels, dressers, special adaptors. Are they still made or available?
   • Cost and lead time of consumables.
9. Condition of Safety / Protection
   • All guard covers, brushes, shields in excellent condition.
   • Enclosures and splash guards intact.
10. Operator Interface & Ergonomics
    • Screens, switches, control panel should all function well.
    • Is there a good lighting setup? Is access easy for wheel changes, maintenance routines?

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If all these areas check out, a second-hand Shapesmart NP4 can still deliver very high precision and long service life.