●Earth (Ground)

To connect casings of devices and/or electronics’ reference potential wirings etc. to the reference potential point in order to eliminate noises and electric shocks, etc. Or it can mean the reference potential point itself.

●EEPROM（Electrically Erasable PROM）

A kind of nonvolatile memories which can be written on or erased. Sustainable of data even after power is cut off.

●Emergency Stop Circuit

A circuit which enables the device to stop ether manually or automatically in case the device is in a dangerous state.

●Encoder

A device to detect the number and direction of rotations by shedding light on a rotating disk with slits and sensing on and off states of the light. (The device converts the rotations into pulses.) The controller detects the position and speed of the slider according to the signals from the encoder.