CONTREX M-Traverse - Manual (Page 68)

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If CP-25 is set to “3”, the change will occur at the next forward or
reverse dwell position. However, if there is no dwell position, a setpoint
change will occur at the start of the reverse plateau in the forward
direction or at the start of the forward plateau in the reverse direction. If
the setpoint is changed to a slower speed, this change will cause a
spike, which will momentarily cause an abrupt jolt to the Follower
mechanism. Therefore, for a smooth operation, it is best to specify a
Dwell (CP-10) parameter.
At-Home Band (CP-30)
The At-Home Band (CP-30) parameter allows for a certain amount of
“range” in the Home position, measured in encoder lines. Although the
Home Set and Home Seek inputs place home exactly at “0”, the At-
Home Band parameter allows home to be located in a band that is
measured in negative and positive encoder lines on each side of the "0"
mark. Enter the desired number of encoder lines in CP-30.
NOTE: The Follower mechanism must be positioned within the At-
Home Band before “Run” is entered. The Follower position must also
be within the At-Home band to activate the At-Home LED indicator
(front panel) and the At-Home discrete output.
The factory defaults for the Edge/Center Based Profile, Home Offset, Change
Activation and At-Home Band Control Parameters are found in Table 3-14. To modify
the default parameters refer to Table 3-15. If you are uncertain how to enter a Control
Parameter, review the
Operations: Keypad section.