CONTREX M-Traverse - Manual (Page 94)

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Example of an Edge Based Profile with Home Offset.
Home Seek moves the Follower mechanism in the reverse direction, bypasses the
Home Sync sensor, and establishes “Home” at the Home Offset position. The Home
Offset position is measured in E.U.s and is the length away from the Home Sync sensor
that has been specified in the Home Offset (CP-31) parameter. When Home Seek
locates the Home Offset position, it ramps down at the Accel/Decel rate (CP-60) to
zero. This causes the Follower mechanism to overshoot the Home Offset position. The
M–Traverse compensates by continuing Home Seek in a forward, triangulated Accel/
Decel move that aligns the Follower mechanism with the Home Offset and establishes
“Home” . This profile is commonly used for applications that can not establish “Home”
at the Home Sync sensor because of interference (e.g., the physical edge of the reel or
a bracket that is in the way). This profile is used in both web scan and level wind
applications.
Jog Speed
(CP-61)
Accel/Decel
(CP-60)
Accel/Decel
(CP-60)
Start Here
Home
Offset
(CP-31)
Home
Sync
Sensor
Forward
Limit
Reverse
Limit
Home