e) Press the EDGE A, EDGE B, or LINE button to select the sensor under test.
f) Press the AUTOMATIC button.
g) Slowly move the sensor left or right and observe
how the guide reacts. The guide should
move the web so that it follows (or chases) the movement of the sensor.
Edge detector: T
he guide should move the web so that the edge of the web is always
aligned with the edge detector’s guide point.
Digital line guide: T
he guide should move the web so that the line or edge pattern is
always aligned with the line guide’s sight point.
Note: If the
guide does not follow the movement of the sensor and moves in the opposite
direction, then the sensor polarity (parameters 3, 4, or 50) is not correct and must be
changed. Refer to page 17 for more information about setting controller parameters.
h) If the guide mechanism oscillates around the guide point or overshoots excessively when
steering in response to an abrupt change in web position, the servo gain (parameter 5) is
too high and must be lowered. Refer to page
17 for more information about setting
controlle
r parameters.
MICRO 4000
NET Web Guide Control System
9
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