Compare UniScan to MultiScan Measurements

Compare UniScan and MultiScan Measurements

Can UniScan and MultiScan Result In Different Numbers?

Yes – they can give different numbers.

This is because UniScan and MultiScan cover different parts of the same straight. I trust UniScan to get me closer to the truth about the shape of the tube. Use MultiScan only when a straight is not straight (bowed) and you have to make it straight by measuring only at the two ends.

1) UniScan covers more of the straight with more data. It will give you an average of the entire straight. 2) MultiScan only covers both ends ignoring the center. 3) UniScan with MTA (measured tube averaging) will give you a different result from either of the above – especially on tubes with high deformation or large diameter tubes. See the video on this page: https://www.advancedtubular.net/vtube-laser.html

UniScan Measurements

UniScan measurements take one group of evenly spaced points over the entire straight. The method use to measure with UniScan is like spray painting. UniScan is the best way to get to a true centerline average - especially for deformed diameters in straights. The reason is because UniScan averages out the entire surface of the straight measured.

MultiScan Measurements

MulitScan only measures near the tangents of a straight. (The tangents are the locations on the straights where the straights and bends meet.) MultiScan measurements are usually reserved for straights that are bowed - like in brake lines with long straights. For those kinds of tubes it is often the case that MultiScan is the only way to solve for a centerline. (UniScan would reject those kinds of straights with the normal tolerances.)

MTA Measurements

MTA (Measured Tube Averaging), combined with UniScan measuring, is the the best type of measuring available in VTube-LASER. MTA allows you to measure multiple sides of the same tube, then average the results into a single final tube shape.

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