Mirror Ball Motor RPM Spread Diameter Lookup
Describe measured ideal one-to-one reflected sweep and ball rotation; actual reflection geometry/facet doubling/beam paths are caller model, not motor rating, rigging or strobe exposure assessment.
Description
A mirror-ball sweep model relates rotations to a measured circular footprint.
A mirror-ball sweep model relates rotations to a measured circular footprint. Real facets and reflection paths can change the relationship.1
Enter nonnegative RPM/time and positive diameter. Return rotations, perimeter travel and tangential m/s under the one-to-one model.
When to use Mirror Ball Motor RPM Spread Diameter Lookup
Use Mirror Ball Motor RPM Spread Diameter Lookup when you need to evaluate the supplied records under the calculation and evidence rules below. No facet doubling, actual beam path, motor rating or rigging assessment is provided.
Prepare the actual venue, production, inventory or financial records requested. Confirm units and supply applicable local limits or verified catalog values.
How to use Mirror Ball Motor RPM Spread Diameter Lookup and understand its results
- Prepare the actual venue, production, inventory or financial records requested. Confirm units and supply applicable local limits or verified catalog values.
- Enter observedMirrorBallRpm, measuredReflectedSweepDiameterM, callerObservationSeconds using the field table and calculation rules, then run the tool.
- Read modeledBallRotationsInObservation, modeledPerimeterSweepM, modeledTangentialSweepSpeedMSecond. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| observedMirrorBallRpm | Observed mirror ball rpm | number | Required |
| measuredReflectedSweepDiameterM | Measured reflected sweep diameter m | number | Required |
| callerObservationSeconds | Caller observation seconds | number | Required |
Enter nonnegative RPM/time and positive diameter. Return rotations, perimeter travel and tangential m/s under the one-to-one model.
rotations=RPM×seconds/60; sweep=πdiameter×rotations Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| modeledBallRotationsInObservation | Modeled ball rotations in observation | number |
| modeledPerimeterSweepM | Modeled perimeter sweep m | number |
| modeledTangentialSweepSpeedMSecond | Modeled tangential sweep speed m second | number |
{
"input": {
"observedMirrorBallRpm": 2,
"measuredReflectedSweepDiameterM": 4,
"callerObservationSeconds": 30
},
"output": {
"modeledBallRotationsInObservation": 1,
"modeledPerimeterSweepM": 12.566370614359172,
"modeledTangentialSweepSpeedMSecond": 0.41887902047863906
}
}Limitations and assumptions
No facet doubling, actual beam path, motor rating or rigging assessment is provided.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Speaker Array Coverage Angle Venue Width Calculator: A centered audience-plane footprint determines an ideal horizontal angle. Measured speaker coverage is a separate input. For a complementary task, use LED Wash Par Can Replacement Equiv Lookup: Replacement lighting estimates need matched-area illuminance rather than wattage alone. Whole fixtures introduce rounding in both output and power.
References
Similar or alternative tools
- Speaker Array Coverage Angle Venue Width Calculator
A centered audience-plane footprint determines an ideal horizontal angle. Measured speaker coverage is a separate input.
- LED Wash Par Can Replacement Equiv Lookup
Replacement lighting estimates need matched-area illuminance rather than wattage alone. Whole fixtures introduce rounding in both output and power.