Rockwell Automation 1441-DYN25-MBAL Balancing Extension Module for the Dynamix 2500 - Manual (Page 30)

30 Rockwell Automation Publication 1441-UM004A-EN-P - May 2011
Chapter 2 Balancing Extension Module
You are returned to the Add Trial Weight screen where the estimated trial
weight displays in both the Mass and Estimated Mass fields.
Estimate the Trial Weight
At times, you may want the data collector to calculate the trial weight for you.
The Trial Weight Estimate is based on the criteria that the trial run centrifugal
force does not exceed 10% of the bearing shaft load.
The Dynamix 2500 data collector calculates the trial weight (mass), the angle,
and the radius by using the following formula.
Follow these instructions to estimate the trial weight.
1. From the Add Trial Weight screen, enter the trial weight’s Angle placement
(typically zero) and Radius.
2. Press F3 (Estimate).
You are prompted to enter the rotor’s mass support in this plane.
3. Enter rotor mass supported in this plane (in the Weight Units specified on
the Balance Setup screen).
Use total rotor mass for single plane and 50% of mass for two plane.
4. Press F2 (OK).
You are returned to the Add Trial Weight screen where the estimated trial
weight displays in both the Mass and Estimated Mass fields.
Trial Weight
.1 rotor mass 9.81 900   
radius [speed  2  
-------------------------------------------------------------------- =