Chapter 9 Flatness Measurements
Setting Up for the Measurement
Measurements Reference Guide 9-7
Choosing a foot spacer
Before you draw the measurement lines, choose a foot spacer. You use the
foot spacers to mark the measurement points, called “stations,” on the
lines as you are drawing the grid. The foot spacer kit includes three foot
spacers: 51 mm (2 inch), 102 mm (4 inch), and 152 mm (6 inch). These
sizes are actually the distances between the scribe lines on the leading
and trailing feet of the foot spacers rather than the overall length of the
foot spacers.
When choosing a foot spacer, remember that the smaller the foot spacer,
the longer it will take you to perform the entire measurement process, but
the better your measurement resolution will be.
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