Relax: Natural Ageing + Preload Release • Castings are left for weeks so internal stress dissipates slowly; no "running-in under stress". • Before assembly, guideway clamps and bearing lock nuts are loosened so guideways and screws sit at "zero stress".
Progress: No-load → Light-load → Heavy-load Ladder • No-load high speed: low → medium → high speed, each for several hours, so rollers/balls form an even oil film. • Light-load cutting: smaller depth and feed, gradually loading to ~50 % normal cutting force. • Heavy-load proof: full cutting force, continuous running, monitor vibration and temperature until both plateau.
Lock: Data Benchmark + Preload Calibration • Laser interferometer checks guideway straightness, wireless ball-bar checks circularity, data benchmarked to factory standard. • Guideway clamps and bearing lock nuts are re-tightened to JSWAY specified torque, avoiding "too tight" or "too loose".
II. On-Site "Four Listen & Three Measure" Method • Listen to vibration: no abnormal high-frequency whistling during no-load high speed. • Listen to oil film: no "dry friction" squeaking during light-load cutting. • Listen to temperature rise: no sudden jumps during heavy-load proof. • Listen to rhythm: stable cycle time, no stuttering under heavy-load continuous run.
III. JSWAY Exclusive Tools • Wireless vibration sensor: real-time spectrum of bearings and guideways, instant alarm on abnormal peaks. • Infrared thermometer: detects temperature rise of bearing housings and slider blocks—stable means qualified. • Laser interferometer: re-checks guideway straightness and ball-screw backlash, data benchmarked to factory standard.
IV. Maintenance “Two-Step Method” • Each shift: infrared thermometer on bearing housings and slider blocks—stable rise means qualified. • Monthly: laser interferometer re-checks guideway straightness, data benchmarked to factory standard.
V. One-Sentence Summary Write “relax-progress-lock” into daily SOP, and let laser, temperature and vibration be the “scale” of break-in — this is the lifetime accuracy insurance JSWAY provides for your Swiss-type lathe.
