Contrex M-Traverse Manuel d'utilisateur télécharger pdf (Page 79)

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TUNING

If your system is unstable, or the position error is unacceptable, tuning may stabilize

your system or reduce the position error differences between the setpoint and

feedback. You can achieve a stable system using conservative values in the Tuning

Control parameters, however the position error may be unacceptable. On the other

hand, aggressive values in the Tuning Control parameters may cause the system to

become unstable. The goal is to reduce the position error to the level that you want, yet

maintain the system's stability.

To achieve an acceptable level of position error, increase the Gain (CP-65) parameter

until the system becomes unstable then reduce the CP-65 incrementally until the

system stabilizes. In systems that require greater accuracy, it may be necessary to

adjust the Integral (CP-66) parameter to reduce any remaining position error. In

systems with low inertia, the position error will be reduced more quickly if you enter

higher values in CP-66. An entry that is too high, however, can create instability or

overshoot the setpoint before reaching the correct value. Generally, use lower entries

for CP-66 on systems with a large inertia.

The M-Traverse comes factory pre-loaded with a complete set of default Tuning

parameters. These default settings are suitable for most applications.

The factory defaults for the Follower Tuning Control Parameters are found in Table 3-

24. To modify the default parameters refer to Table 3-25. If you are uncertain how to

enter a Control Parameter, review the

Operations: Keypad

section.

Table 3-26 Default Tuning Control Parameters

CP Parameter Name Parameter Value

CP-65 Gain 3000

CP-66 Integral 1

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 201 202

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Contrex M-Traverse Manuel d'utilisateur Page 79