From The Bed Saddle: JSWAY Swiss-Type Accuracy at The “Foundation” Level

In the Swiss-type lathe industry, the bed saddle is often likened to a “foundation” — it carries the spindle, turret and all cutting reaction forces, yet must remain rock-steady at the micron scale. Starting from this “foundation”, JSWAY CNC locks bed deformation within the allowable band through constant-temperature natural ageing plus laser side-master-line calibration, laying an unshakeable basis for machine-wide micron-level accuracy.

JSWAY places the cast bed saddle in a constant-temperature environment for several of weeks, allowing casting stresses to release slowly. This process involves no heating or cutting — only “time + temperature” — yet it effectively eliminates microscopic distortion, ensuring the bed will not deform during subsequent machining, transport or temperature changes — JSWAY’s first time-insurance for long-term accuracy.

The side-master-line of the bed saddle is the “invisible spine” of turret transverse motion. JSWAY uses a laser interferometer to sweep the side-master-line point by point, comparing the theoretical straight line with the actual one in real time, and adjusts guideway clamping forces point by point, locking side-master-line error within the allowable band. This “laser lock” is more precise and traceable than traditional feeler-gauge

adjustment, ensuring zero-drift transverse motion of the turret.

Monthly, JSWAY still uses a laser interferometer to re-check bed straightness, benchmarking data against factory standards. Any drift triggers immediate alarm and compensation, ensuring the bed saddle remains “rock-steady” throughout the machine’s life cycle.

On the JSWAY site, you can see: the laser sweeping the bed, micron-level run-out displayed in real time; long-axis cutting, roundness visible on site; continuous operation, accuracy rock-steady long term. This is JSWAY’s on-site value locked from the “foundation” — locking in customer delivery anxiety and locking in customer accuracy anxiety.

Starting from the bed saddle, JSWAY locks micron-level accuracy with “time + laser + data”, so that every cut of the Swiss-type lathe is rock-steady — this is JSWAY’s on-site value starting from the “foundation”.