Machinery Diagnostics
For rotary machines, unbalanced rotating mechanisms easily generate unacceptable vibration and noise, while reducing the lifetime of shaft bearings. The unbalance can be caused by effective displacement of the mass centre line from the actual axis of the mechanism. Especially in tooling machines, vibrations caused by the unbalance can seriously affect machining precision.
To avoid such vibration and noise, the imbalance is reduced using a procedure known as dynamic balance, in which an accelerometer and tachometer measure vibration frequency and rotary speed to enable calculation of the unbalanced mass and deviation angle. A DSA (dynamic signal acquisition) module with high resolution and wide dynamic range is implemented to receive output from the accelerometer and tachometer.
ADLINK Solution: USB-2405: 4-CH 24-Bit 128kS/s Dynamic Signal Acquisition USB 2.0 Module
The USB-2405 is a 24-bit USB DSA delivering 4 simultaneous-sampling input channels capable of simultaneously measuring both accelerometer and tachometer. Each channel provides up to 2mA excitation current to IEPE or ICP® sensors. With the library of the included Visual Signal DAQ Express utility, vibration frequency and rotary speed can be calculated precisely with no programming requirement for further dynamic balance analysis.