User`s manual

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1-3 Principle of operation of control systems, simple design of a positioning system
[1] Principle of operation of control systems
This module adopts a pulse output type open loop control system. "Open loop control" is a system
where control is performed without positional feedback on the assumption that the motor operates
according to given input pulses. Stepping motors are often used in this control system. Stepping
motors rotate for the predetermined angle each time that a pulse signal is given. Accordingly, the rpm
of stepping motors is proportional to the number of pulses of the pulse train from this module, and the
rotation speed is proportional to the frequency of the pulse train.
Position output
Position instruction pulse
12 n
Angle of rotation
• When open loop control is used on this module, all speed data (p/s) and coordinate data (p) are
set referenced to pulses.