Section 9: Balancing Rotors
129
Against rotation (AR) means that if the rotor is turning forward then
you place your weights backwards from the reference point (i.e. in
the opposite direction of the rotor’s rotation).
Ensure that with the rotor stationary, you measure angles in the
direction specified. Do not rotate the rotor in the direction specified.
The selected option is also stored when the balancing data is saved,
and reloaded if the data is reloaded from memory.
Note: AR and WR now only describe the placement of balance
weights. AR and WR no longer apply to tachometer or cross channel
phase measurements.
Remove Trial Weight(s)?
Used to specify whether the trial weight is left on or taken off after
the trial reading.
Note: For dual plane balances, if Remove Trial Weights = Yes then
the trial weight must be removed after each trial run.
Weight Position
Performing balancing operations on a rotor requires establishing a
positioning system for balance weights. To do this you must first
establish a reference mark anywhere on the rotor circumference then
choose the technique that is most appropriate for your balance job.
Degrees
Measure the angle in degrees (0° to 359°) from the reference mark.
The radius must stay constant.
Circumference Arc
Measure the linear distance around the outside of the rotor from the
reference mark to the weight.
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