Rockwell Automation 1441-DYN25-MBAL Balancing Extension Module for the Dynamix 2500 - Manual (Page 27)

Rockwell Automation Publication 1441-UM004A-EN-P - May 2011 27
Balancing Extension Module Chapter 2
Take the Initial Vibration Measurement
The initial vibration measurement is taken without any added weights on the
machine. The initial vibration measurement establishes a reference of how the
machine vibrates at each plane without any extra weight added. This vibration is
what will be corrected by the correction weight.
1. If you are using an external tachometer, optical tachometer, or strobescope
as the trigger source, then connect the tachometer cable to the POWER/
USB/TRIGGER connector at the top of the data collector.
2. Attach a transducer to the machine to be balanced.
3. Mark the rotor by making a mark on one rotor that will serve as a reference
mark.
It is also possible to use an existing mark on the rotor as the reference mark,
such as a key or keyway.
4. Start the machine and allow it to reach normal running speed.
5. Press Enter to take the initial vibration measurement.
TIP Skip step 1 if you are using the internal Laser
Tachometer as the trigger source.
IMPORTANT If the rotor has multiple positions (vanes or fan blades), the
reference mark must be at one of the blade positions.
TIP Depending on your setup, the Dynamix 2500 data
collector may ask if the transducer is attached to
plane 1. If the transducer is attached, press F4 (OK).