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3-1
Overview
The Position Control Unit (PCU) outputs control voltage pulses to motor driv-
ers. The basic control unit, therefore, is the pulse; control voltages differ by
the number of pulses they contain.
Pulses are signals sent to motor drivers to command precise motor motion.
In order to facilitate programming, the Teaching Box accepts input in units of
pulses, millimeters (mm), or inches. The type of unit is set with the Teaching
Box or PC and entered at parameter address 400 for the X axis and 800 for
the Y axis. The magnitude of the pulse rate is entered at address 401 for the
X axis and 801 for the Y axis.
The pulse rate is equivalent to dividing the movement, x, of an object at-
tached to a motor by the number of pulses, n, required for this movement.
The pulse rate thus equals x/n. In actual operation, the data input in normal
units of distance is translated by the Teaching Box so the data is stored di-
rectly as pulses.
The most convenient way to set data is with the Teaching Box. Specific
memory areas in the Position Control Unit are designated for certain types of
data. The data provides the precise information necessary to drive a stepping
motor or servomotor through a number of specific motions. There are five
types of data: parameters, speeds, dwell times, acceleration and decelera-
tion times, and positioning actions. When setting data for the first time, you
must set parameters first, followed by speeds, dwell times, acceleration and
deceleration times, and then positioning actions.
Pulse Rate
Setting Data
Overview
Section 3-1