Page 77 - Glass-Technology International no. 5-2018

AUTOMATIC PRINT QUALITY
CONTROL VISION SYSTEM
APPLICATION. MULTIPLE DEFECTS
HAVE BEEN IDENTIFIED AND THE
SELECTED DEFECT ZOOMED

AUTOMATIC SCREEN
PRINTING CONTROL VISION
SYSTEM APPLICATION. THE
GLASS HAS BEEN GRABBED
AND SUCCESSFULLY
INSPECTED

The operator can ‘surf’ the The recipe is creating by
whole glass surface and, placing a sample glass on
if necessary, zoom on se- the printing table and the
lected areas to analyse im- cameras are driven in jog
age details. Moreover, the to visualize the referen-
software shows the error tial targets. Once found,
detected and highlights the targets are saved in
the specified area on the the recipe and showed on
monitor. the monitor. The sample
After inspection, the glass glass is then unloaded, the
can then be diverted to a screen provided with tar-
visual inspection station gets in adequate positions
where the operator per- is inserted, and the cam-
forms an extra inspection eras detect the screen po-
without halting the line. sition. The operator leads
the screen approximately
AUTOMATIC SCREEN to the right position so that
REGISTRATION it is blocked and, using
SYSTEM WITH the motorized calibres, the
CAMERAS accurate positioning op-
The automatic screen reg- erations are automatically
istration system is com- performed by dedicated
posed of two cameras in- software, until the targets
stalled under the printing have been matched.
table and driven by two The images of the two
servo-motors to store the cameras, showing the tar-
data in the recipe. The sys- gets, are displayed on a
tem automates the adjust- monitor, while the opera-
ment of the screen with the tor has the commands to
glass to be printed. move the cameras and the

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