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PCL 832 Operating Principles
Digital Differential Analysis
To understand how the PCL-832 works, it is necessary to understand
the principles of DDA (Digital Differential Analysis).
In order to obtain synchronization in a multi-joint servo motor system,
all axis start sending position commands simultaneously (T1), and
stop sending these commands simultaneously (T2) as well. The
duration of this period (T2 - T1) is defined as one DDA cycle. The
duration of the DDA cycle can be set (by software) from 1 msec. to 2
seconds.
Consider the figure below. For every pulse output, the servo motor
driver will advance the servo motor "one step" (n degrees). One pulse
therefore represents one position-command. You can set the number of
pulses in one DDA cycle, from 0 to 4095. The number of pulses in
one DDA cycle represents the total position change possible by that
DDA cycle.
T1
16
PCL 832
DDA cycle
User's Manual
C H 1
C H 2
C H 3
T2
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