Machine Tool Vibration Monitoring

Why the structure knows before the controller does

A collision dumps a shock wave into the casting long before the drive current or the position loop reacts. A sensor bolted to the spindle housing sits at the source: the GKG392's ±40 g range and 500 Hz bandwidth resolve the impact transient a crash actually produces, while the same triaxial channel picks up the tooth-passing frequency and the chatter signature of a wearing tool. One sensor covers two protection jobs — and it needs no proprietary bus: standard MODBUS RTU feeds the CNC, a PLC or the plant monitoring system.

Typical use cases

Vibration truth at the cutting point

Spindle crash & collision detection — a GKG392 on the spindle housing logs the impact transient as it enters the structure, giving the controller or a safety PLC a trigger before more scrap is cut, plus a peak-g record for the post-mortem.
Tool wear & breakage watch — tooth-passing frequency and chatter amplitude trend inside the same 500 Hz band; a rising trend flags a dulling tool, and a step jump flags a broken one.
Spindle bearing & gearbox health — bearing defect frequencies and gear-mesh harmonics compared against a commissioned baseline, on machines that run around the clock.
Plant-wide roll-out — many machines share one RS485 / MODBUS chain and one log format; where the monitoring network is IP-based, the GHA360 adds an Ethernet triaxial channel of the same measurement.