Denford PCB Engraver User Manual page 38

11: Glossary
JOG CONTROL.................... Manual movement mode for the machine axes, using very small pre-defi ned
M CODE ............................. A miscellaneous code function in a CNC program used to indicate an auxiliary
MACHINE DATUM ............. A fi xed zero reference point set by the machine manufacturer. The machine datum is
MACHINE OFFSET.............. The workpiece offset fi le used with VR and real CNC machines.
MDI ..................................... Manual Data Input - A method used for manually inserting data into the control system
MODAL ............................... Modal codes entered into the controller by a CNC program are retained until changed
NC ...................................... Numerical control.
OFFSET ............................. Combination of two types of fi le, the workpiece offset and the tool offset. Used to
PART DATUM ..................... Used as a zero reference point in a CNC fi le. All machining co-ordinates originate
PART PROGRAM................. A list of coded instructions which describes how the designed part, or com po nent, will
PC ....................................... Personal computer.
POST PROCESSOR............ A fi le or setting that contains instructions for a CAM system, detailing how to create
PROGRAM ......................... A systematic arrangements of instructions or information to suit a piece of equipment.
RAPID TRAVERSE .............. Fast movement of the cutting tool through the 3 machine axes between cutting
REFERENCE POINTS ......... The machine has 3 reference points used in setting the limits of movement for its
REMOVEABLE MEDIA.........A computerised storage medium that is not permanently attached to the system, e.g.
Engraver MOTOR................. The removable cutting head (motor). Also referred to as the machine head.
RPM...................................... Revolutions per minute (rev/min) - a measure of spin dle speed.
SLIDES................................. The 3 machine axes - see axis.
SPINDLE SPEED ............... The rate of rotation (velocity) of the machine head / cutting tool, measured in RPM.
SOFTWARE ....................... Programs, tool lists, sequence of instructions etc...
PCB Engraver Operator Manual
movements, called jog steps. One stepped movement is applied per movementusing
the machine offset facility. key/button press.
function (ie, coolant on, tool change etc.).
used to defi ne the co-ordinate based grid system of the CNC machine. All machining
co-ordinates originate from this point. However, this point can be temporarily moved
(ie, Desktop Tutor, qwerty keyboard etc.).
by a code from the same modal group or cancelled.
describe the workpiece datum, a zero reference used on the CNC machine to ensure
machining occurs in the correct place on the billet. Offsets are used to shift parts of
the three dimensional co-ordinate based grid system, used by the CNC machine.
from this point.
be manufactured. The part program is also referred to as the CNC fi le, program, or G
and M code program.
CNC code that can be understood by a particular CNC system (e.g. VR CNC Milling).
settings.
slides (axes).
Floppy Disk, Flash Memory Card, USB Memory Key, CD/DVD disc.
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