DFE SteadyWeb, Инструкция по эксплуатации

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SECTION 7
TUNING FOR RUNNING STABILITY
7.0 INTRODUCTION
The procedures in this section apply to all versions of SteadyWeb controllers, used in all tension
zones. Unlike most of the adjustments for standard features and options, tuning adjustments can not
be preset at the factory for every application.
7.1 DESCRIPTION OF ADJUSTMENTS (see Figures 16, 41 Control Board)
There are three tuning adjustments; GAIN, STABILITY, and RESPONSE.
The GAIN pot. determines the sensitivity of the controller. A low setting will produce a small output
change upon a tension error and a high setting will produce a large output change. Thus, if GAIN is
set too low the running tension may be different from the set tension. If set too high, the controller may
be unstable.
The STABILITY pots. (coarse and fine adjustments are provided) provide variable amounts of
damping. If set too low, the controller may be unstable. If set too high, the controller may ignore some
tension variations instead of correcting for them. The controller may also appear to be very slow to
react.
The RESPONSE pot. adjusts the controller's reaction time when a tension variation occurs. If set too
high, the controller may be unstable. Low settings are not a problem. This adjustment has relatively
little affect compared to the STABILITY adjustment. It is normally used for fine tuning.
The adjustment pots. at the right side (labelled B) are only used with the DUAL CALIBRATION option.
The adjustment procedure is identical to the one for the left side pots. (labelled A). If you have the
Dual Calibration option, be sure to put the front panel switch in the "B" position before adjusting the "B"
pots.
Figure 40 - TUNING POTS.