Cam control basics
3.4 Dynamic adjustment
FM 352 electronic cam controller
24 Operating Instructions, 05/2011, A5E01071724-03
3.4 Dynamic adjustment
Task
The dynamic adjustment is used to compensate delay times of the connected control
elements.
Derivative-action time
You can program a delay time and assign it as derivative-action time to each cam. You can
assign one derivative-action time to each cam. The derivative-action time applies to the cam
start and end position.
Actuation distance
The actuation distance of a cam is calculated continuously based on the current velocity and
derivative-action time. The entire cam is shifted in direction of the actual value by this value.
The programmed range is the "static range," and the range calculated based on the
derivative-action time represents the "dynamic range."
Actuation distance = <derivative-action time> x <actual velocity of the axis>
FM 352 calculates the actuation distance of all cams within 1/4 of the longest programmed
derivative-action time.
An extremely high derivative-action time of a cam reduces the dynamic performance of cam
processing.
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