CONTREX M-Traverse - Manual (Page 163)

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based on the Lead. The Follower travels the setpoint distance while the Lead travels the
distance entered into CP-16. In the level wind application, the Setpoint parameters are the
laypitch (center-to-center distance between windings on the reel). In the web scanning
application, the Setpoint parameters are the traverse length. These preset parameters can be
set up as a switch (via the Setpoint Select switches) which gives the operator the option of
changing over the product up to four times.
CP-08 TRAVERSE LENGTH 4
The Traverse Length (CP-08) parameters are set up as pairs in conjunction with the Setpoint
parameters. There are four pairs of Setpoint and Traverse Length parameters. The Traverse
Length value is entered in Engineering Units (E.U.s) and the decimal position that was entered in
the Engineering Units (CP-15) parameter is automatically displayed. The traverse length is the
distance that the Follower mechanism will travel. In level wind applications, the traverse length
is generally the length of the reel. In web scanning applications, the traverse length is generally
the width of the web. The traverse length measurement corresponds to the setpoint
measurement. For example, in a level wind application, you may have a reel that measures one
foot, that is wrapped with two inch hose. You would enter "2" (inches) in Setpoint 4 (CP-07) and
"12" (inches) in Traverse Length 4 (CP-08).
CP-09 ACCEL/DECEL LENGTH
The Accel/Decel Length (CP-09) parameter allows the Follower mechanism to ramp to either the
constant pitch plateau or end dwell, either gradually or rapidly. In level wind applications, this
parameter is a portion of the encoder lines in one rotation of the reel (Lead). In web scanning
applications, this parameter is a portion of the encoder lines in one traverse length. The lower
the number, the more rapidly the Follower mechanism ramps to the constant pitch plateau or end
dwell. The higher the number, the more gradually the Follower mechanism ramps to the
constant pitch plateau or end dwell. As a guideline, keep in mind that you do not want the accel/
decel rate to exceed the load that the motor drive or mechanics can accommodate. The Accel/
Decel Length Parameter does not need to be an exact number, the system will perform
adequately with a close estimate.
CP-10 DWELL
The Dwell (CP-10) parameter allows the Follower mechanism to pause at the end of the
Follower profile before ramping back in the opposite direction. In level wind applications, this
parameter is a portion of the encoder lines in one rotation of the reel (Lead). In web scanning
applications, this parameter is a portion of the encoder lines in one traverse length. The Dwell
Parameter does not need to be an exact number, the system will perform adequately with a
close estimate .