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Multi Plane Balancing Calculator

Below calculator could be used to perform dynamic balancing calculation for more than one plane.

ROTOR BALANCING — LEAST-SQUARES INFLUENCE COEFFICIENT METHOD

Dynamic Balance Solver

Enter the unbalanced vibration reading, then one trial run per correction plane. The solver builds the influence-coefficient matrix, computes correction weights by least squares, splits each one across the two nearest mounting holes, and lets you run a follow-up trim pass.

01

Configuration

A measurement point is one vibration pickup / phase reference location. You need at least as many measurement points as correction planes. Holes/blades are assumed evenly spaced on one ring, shared by every plane.

02

Initial (unbalanced) run

Vibration amplitude and phase at each measurement point, before any trial weight is added.

03

Trial runs

Add one trial weight at a time and record vibration at every measurement point. By default the trial weight is removed before the next plane's trial — tick "Keep this trial mass on the rotor" under a trial if you'd rather leave it fitted; the calculator accounts for it either way.

Correction weights — split to nearest holes

Influence coefficient matrix

Predicted residual vibration after correction

04

Trim balancing (if the result isn't fully satisfactory)

After mounting the correction weights above, run the rotor again and enter the new vibration readings here. If it's not yet within tolerance, this calculates a small additional trim mass per plane from the same influence coefficients found in Step 03 (no new trial weights needed) — also split to the nearest holes. Run Step 03 first — the button below stays disabled until then.

Trim correction weights — split to nearest holes

Final weight to mount at each hole (initial correction + trim combined)

Convention: every phase angle (initial run, trial weights, trial/trim readings) is measured from the same fixed 0° reference mark on the rotor, against the direction of rotation — the usual stroboscope convention. Hole numbers increase opposite to the direction of rotation, with the highest-numbered hole sitting at the reference mark. Correction and trim angles are returned in that same frame.

Runs entirely in your browser — nothing entered here is sent anywhere.

Rotor diagram

Grey dots are mounting holes: Hole N sits at the 0° reference mark, and hole numbers increase opposite to the direction of rotation — so a larger hole number means more phase lag against rotation. The teal arrow shows direction of rotation. Lighter lines are trial weights, darker lines are calculated correction weights.