| A | B |
|---|
| World Coordinates | A fixed reference frame attached to some point of the machine tool |
| Spindle Speed Override | A manual, operator controlled change in the rate at which the tool rotates while cutting |
| Part Program | A description of a part, in a language that the controller can understand |
| Offsets | An arbitrary amount, added to the value of something to make it equal to some desired value |
| Lead-screw | A screw that is rotated by a motor to move a table or other part of a machine |
| Kinematics | The position relationship between world coordinates and joint coordinates of a machine |
| Jog | Manually moving an axis of a machine |
| Joint Coordinates | These specify the angles between the individual joints of the machine |
| EMC | An application that presents a graphical screen to the machine operator |
| Feed Rate | The speed at which a cutting motion occurs. |
| Encoder | A device to measure position. |
| CNC | The general term used to refer to computer control of machinery |
| Ball Nut | A special nut designed for use with a ball-screw |
| Backlash | The amount of "play" or lost motion that occurs when direction is reversed in a lead screw |
| Axis | One of the computer controlled movable parts of the machine |
| Configuration | The task of setting up EMC2 so that it matches the hardware on a machine tool |
| Display Units | The linear and angular units used for onscreen display |
| NIST | An agency of the Department of Commerce in the United States |
| Real-time | Software that is intended to meet very strict timing deadlines |
| Servo Motor | A motor that is used with error-sensing feedback to correct the position of an actuator |
