Machinery Balancing Module
Balancing Using the Strobe light
Balancing Using the Strobe light
The strobe light contains an internally tuned filter that is incorporated in a phase
shifting network, which allows the shaft reference mark to be directed at any convenient
location on the machine while balancing or performing motion studies (phase
measurement) along a machine’s casing or along a machine train.
Examples of a convenient location are the machine’s horizontal split line, top or bottom
dead center, or the plane of the reference transducer.
It is recommended to log this reference location for use in future
studies or balancing procedures.
As a general setup guideline, in order to be triggered properly and to read phase
properly, check the following:
•
Connect the interface cables between the strobe light and the GX. The Input and
Output jacks are located on the left side of the strobe light.
•
Connect the vibration transducer to the strobe light cable.
Use accessory cables CMAC 5404 (input cable) and CMAC 5406
(output cable). Reference
Appendix C, Using the Headphones
and Strobe Light
for connection details.
Ensure the phase control knob on the strobe light indicates 0.
Ensure the lock / track rocker
switch is set to INT.
Set the bandwidth rocker switch to the desired position (narrow if
you expect the 1X speed to be constant or wide if you expect the
1X to vary).
Important! Ensure the strobe light battery is fully charged before you start
balancing. If the battery is close to being fully discharged you will not get accurate
readings.
The vibration transducer provides the signal the strobe uses as a phase trigger source
and is the input to the strobe. The vibration transducer also provides the vibration
signal to the GX. The interface cable provides a “TEE” connection to both. The strobe
provides the phase referenced tachometer signal (output), which is used as a TTL input
to the GX for triggering.
•
When you are ready to start the balancing procedure
and the machine is running,
tune the strobe to 1X running speed.
Reference your Strobe Light User Manual for details on how to
tune the strobe.
•
Once the reference mark is frozen (slight rotation is acceptable), switch the Lock /
Track rocker switch to EXT. The flash rate is now derived from the vibration
transducer.
The trigger must stay depressed until the Microlog is finished
capturing the data.
Once the Microlog has captured the data return the Lock / Track
rocker switch to INT.
SKF Microlog - GX Series
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User Manual
