Medallion vs Coin Rotation Checker
Observedcoin180°versusmedal0°alignment undercallermeasurementtolerance,not authenticity/issuemintstandard.
Description
Coin and medal alignment describe the reverse's rotation relative to the obverse.
Coin and medal alignment describe the reverse's rotation relative to the obverse.1
A measured angular tolerance permits comparison near 180 degrees and near zero without authenticating the issue.
When to use Medallion vs Coin Rotation Checker
Use this tool to apply the stated medallion vs coin rotation checker operation with an explicit input and unit basis.
How to use Medallion vs Coin Rotation Checker and how it works
- Establish the measurement basis and units described above.
- Enter actualObservedReverseRotationFromObverseDegrees, callerIndependentAlignmentToleranceDegrees and run the tool.
- Read result.coinAlignmentMatch, result.medalAlignmentMatch using the output meanings below.
- If input is rejected, correct the stated type, range, ordering or alignment issue and rerun; review successful results under the declared convention.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualObservedReverseRotationFromObverseDegrees | Observed reverse rotation from obverse degrees, on the basis specified in the algorithm. | number | required; finite; further conditions in the algorithm |
| callerIndependentAlignmentToleranceDegrees | Alignment tolerance degrees, on the basis specified in the algorithm. | number | required; finite; nonnegative; further conditions in the algorithm |
Require finite angle and tolerance from zero to less than 90 degrees. Normalize angle modulo 360; compare to 180 for coin alignment and circular distance to zero for medal alignment.
coin = abs(angle−180) ≤ tolerance; medal = min(angle,360−angle) ≤ tolerance Apply the declared units, ordering and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the declared output fields. | object |
| result.coinAlignmentMatch | True when normalized rotation is within tolerance of 180 degrees. | boolean |
| result.medalAlignmentMatch | True when circular rotation is within tolerance of zero degrees. | boolean |
{
"input": {
"actualObservedReverseRotationFromObverseDegrees": 180,
"callerIndependentAlignmentToleranceDegrees": 2
},
"output": {
"result": {
"coinAlignmentMatch": true,
"medalAlignmentMatch": false
}
}
}Limitations and assumptions
The output applies the declared operation to the values you supply. Establish the measurement basis, units, coefficients and any caller-selected rules before interpreting it. The tool does not independently collect or verify observations or decide whether a model or reference applies.
Supply explicit required fields with the documented types and dense aligned arrays. Unknown fields, wrong types and nonfinite numbers are rejected. Branch-specific constraints are explained above. A successful false boolean, negative signed difference, empty slice or unresolved tie is distinct from an input error. Very large inputs or outputs may be rejected by shared resource limits.
Alternative or Complementary methods
Use Die Rotation Deviation to complement this result. Measure the smallest angular deviation from a supplied expected alignment.
Use Coin Weight Deviation to complement this result. Compare measured coin mass with a separately established reference mass.
References
-
Medallion vs Coin Rotation Checker — tool.io
Similar or alternative tools
- Die Rotation Deviation
Measure the smallest angular deviation from a supplied expected alignment.
- Coin Weight Deviation
Compare measured coin mass with a separately established reference mass.