musings on calibration</A>
for a more in-depth discussion.

<P>I had earlier proposed a technique which uses numerous measurements
on a calibration print in the calibration procedure to reduce XY distortions.
While this technique does work, it is limited by errors in measurement,
printing, and part warpage when the plastic cools.
It also assumes that the print spread is anisoplanatic, where on most printers
it is not.
I know that my blower is not completely uniform, and spread around the nozzle
is not unifo