MicroLinks UM05 - user manual - Manual (Page 51)

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51
Copyright © 2008-2012 MicroLinks Technology Corp.
 When the magnification is high, metal ruler is less accurately than a
calibrator.
 When the magnification is low, a metal ruler can be suitable.
(5) Calculate scale rang
First, the scale setting must calculate the horizontal and vertical scale range,
the following has several steps to decide the scale range, suggested that the
windows size adjust 640*480 the single windows：
 To decide measure distance between machine and observation objects.
 To adjust the focus to see the image as clear as it can.
 Calculate the observation video image of horizontal and vertical scale.
Calculate the range shown in Fig.5-33.
After setup the horizontal and vertical scales, the machine, the observation
distance and focus are not allow to readjustment.
Fig.5-33 Horizontal and vertical measurement range
(6) Calibrate “contacted” and “non-contacted” scale
 Contacted scale: Put the machine onto the calibrator for small field of view ,
it can apply for a focus point at Low or High magnification.
 Non-contacted scale: To hold the machine by the supporter, fix the machine
overhead a ruler for a certain distance, it can observe a wider field of view.
 Non-contacted scale is only for low magnification. See Fig.5-37.