True Position Calculator
Total True Position Error
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0.0000
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Bolt Circle Pattern Deviation
Analyze if the pattern error is a linear shift (fixture offset) or a rotational error (clocking).
°
| Hole # | Nominal Angle | Actual X | Actual Y |
|---|
Linear Shift (Fixture)
X: 0.0000
Y: 0.0000
Mean deviation from center
Clocking Error (Rotation)
0.000°
Angular rotation of pattern
Root Cause Analysis
Linear Error Indicators
If every hole is shifted by the same X/Y value, your Fixture Offset (G54-G59) is likely incorrect.
Clocking Error Indicators
If holes at 12:00 are out in X, but holes at 3:00 are out in Y, the part has rotated in the fixture.
Position Formula
$TP = 2 \times \sqrt{\Delta X^2 + \Delta Y^2}$
Pro Tip: Removing linear shift via offset adjustment is the easiest way to bring a pattern back into tolerance.