CONTREX M-Traverse - Manual (Page 91)

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FOLLOWER MODE (WEB SCANNING OR LEVEL WIND)
The M–Traverse is specifically designed for the precise control of reciprocating lead/
follower motion control applications. Its primary mode of operation is the Follower
mode. The Run input (J4, pins 6,7) activates the Follower mode when the following
conditions have already been established:
• The Control Mode (CP-14) is set to the Follower mode:
“1” for Standard.
“3” for Lay Adjusted.
• The M–Traverse is either in F-Stop or a position hold state.
• The Follower mechanism is within the At-Home Band (CP-30).
• MV-58 displays “0”, indicating that there is a valid Follower profile.
When the Follower mode has been activated, the Follower mechanism will begin to
move from “Home” in a forward direction (toward the Forward Limit). As the Follower
mechanism travels along the Traverse Length (CP-02, CP-04, CP-06, or CP-08), it
accelerates for the specified Accel/Decel Length (CP-09) then travels the constant pitch
plateau at the Process Ratio (MV-86). At the end of the constant pitch plateau, the
Follower mechanism decelerates the specified Accel/Decel Length (CP-09) to Dwell
(CP-10). The Follower mechanism remains at zero speed for the specified Dwell then
repeats the same profile in reverse. If the Wait input (J4, pins 7, 8) is shorted to
common (low) the Follower mechanism will pause at the closest end of the profile until
the Wait input is open (high). The Drive Enable discrete output is active during the
Follower mode.
Caution: To avoid damage to your system, the M–Traverse must be calibrated and the
motor drive set up before you enter the Follower mode. Refer to Installation/
Setup: Calibration.
The following diagram illustrates the Follower profile:
Traverse Length
Accel/
Decel
(CP-09)
Follower/Lead
Ratio
Home
Sync
Sensor
Forward
Constant Pitch
Plateau
Dwell
(CP-10)
Reverse
Traverse Length
Accel/
Decel
Length
(CP-09)
Accel/
Decel
(CP-09)
Dwell
(CP-10)
Dwell
(CP-10)
Constant Pitch
Plateau
Process
Ratio
(MV-86)
Accel/
Decel
Length
(CP-09)