CONTREX M-Traverse - Manual (Page 14)

1-5
Web Scanning is another common M–Traverse application. The Web Scanning
application frequently uses the Standard option in the Follower mode of operation,
however, there are applications for which Web Scanning may use the Lay Adjusted
option in the Follower mode of operation. The M–Traverse locates the start or “Home”
position and accelerates the traversing mechanism (Follower) to the preset laypitch
(Setpoint). The traversing mechanism applies a secondary product, such as glue or
reinforcing fiber, onto the moving web. Then the M–Traverse decelerates the traversing
mechanism to zero speed at the end of the “Traverse Length”. At the “Dwell” (which is
usually set at zero) the traversing mechanism reverses its direction and returns with a
symmetric reverse profile. Using zero or very low “Accel / Decel” and “Dwell”
parameters creates a zigzag pattern. Figure 1-2 illustrates a typical Web Scanning
application.
Figure 1-2 M–Traverse Web Scanning Application
CONTREX
FEEDBACK FREQUENCY
HOME SYNC
LEAD FREQUENCY
LINE FLOW
FOLLOWER
LEAD
M-TRAVERSE
Status Batch Count
7 8 9
4 5 6
1 2 3
0
Clear Enter
Cut Length Position
Alt
M–Traverse