●Open Collector Output

A method without load resistance in a voltage output circuit. Signals are sent by sinking the load current. This circuit can switch on/off the load current regardless of whether the load is connected to any V potential, and is widely used for switching external loads such as relays or lights, etc.

●Open-loop Method (Control)

One of control methods in which only indications are made without feedbacks. The stepping motor is a representative example. The controller cannot correct the error when a stepout (signal error) occurs. Because the command value and the actual value are not compared.

●Origin

The reference point for actuator movements. The actuator memorizes its own position as counts of pulses from the origin.

●Origin Precision

Variability of the positions when the return to origin is implemented repeatedly. (If the origin position gets out of its place, every position gets out of its place accordingly.)

●Overload

The state in which more than allowable load is applied in a　mobile portion of a machine or an electric/electronic circuit.