Rockwell-automation 1771-QB Linear Pos. Uživatelský manuál stáhnout pdf (Strana 104)

Formatting Module Data (WRITES)

Chapter 7

725

The velocity smoothing constant determines how quickly the system will

change its acceleration and deceleration. The higher the value, the more quickly

acceleration and deceleration will change. A higher, faster value produces

jerkier motion, while a lower, slower value produces a smoother transition. The

following diagrams demonstrate the effect of the velocity smoothing constant.

Figure 7.34

Lower

elocity Smoothing Constant

50021

Velocity

Acceleration

Deceleration

Time

If the velocity smoothing constant is set to zero, velocity smoothing is disabled,

and acceleration and deceleration will change instantaneously. The zero setting

produces the jerkiest motion.

Because of the smoother motion that can be achieved by using this feature, you

can achieve higher acceleration and deceleration levels without jerk. The

smoother motion also results in less wear and tear and less tendency to

overshoot the intended end position.

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Rockwell-automation 1771-QB Linear Pos. Uživatelský manuál Strana 104