Does this choose a balance grade for a paper roll?

No. Enter a G value or specific residual-unbalance limit already selected by the responsible specification or engineering process.

Does it split total unbalance between two planes?

No. The number of correction and tolerance planes and allocation among them require the applicable rotor geometry and controlled procedure.

Does it calculate a correction mass?

No. Correction requires vector magnitude and phase at defined planes/radii and cannot be inferred from a scalar total tolerance.

Does it set vibration limits?

No. Machine vibration acceptance and paper-quality criteria are separate from residual-unbalance arithmetic.

Source-gated rigid-rotor arithmetic

Documented Roll Residual-Unbalance Arithmetic

Convert a documented speed and documented G or specific-unbalance limit into total scalar residual-unbalance arithmetic. No paper-roll grade,plane allocation or correction vector is invented.

No automatic G gradeNo 50/50 plane splitNo correction mass

Total scalar residual-unbalance arithmetic

Rotasjonshastighet

Angular speed

Specific residual unbalance e

Entered basis

Scalar arithmetic only.

surface mode:n=v/(πD); ω=2πn/60; G mode:e=1000G/ω [μm]; U=eM [g·mm]

The identity1kg·μm=1g·mm is used.Direct-e mode skips the G conversion.U is a scalar total arithmetic value,not an allocated tolerance-plane vector.

Current source status

ISO21940-11:2016,edition1,confirmed2021 and currently under systematic review,with Amd1:2022 establishes procedures/tolerances for rotors with rigid behaviour.It covers magnitude,necessary correction planes,allocation to tolerance planes and balancing errors.It excludes flexible behaviour,which is addressed by Part12.

NEEDS_LICENSED_SOURCE: exact G selection,formula/constants,plane allocation,acceptance and amendment details.No paper-industry G recommendation is asserted.

Ikke beregnet

Paper-roll balance grade or vibration limit.
One/two-plane selection or a50/50 split.
Correction mass,phase,radius or couple/static components.
Bearing force,vibration response,paper quality or field-balancing readiness.

Kilder

ISO21940-11:2016; ISO21940-11:2016/Amd1:2022; ISO21940-1:2019.