Acu-rite 200S User Manual download pdf (Page 17)

200S 3

I - 1 Fundamentals of Positioning

Absolute Workpiece Positions

Each position on the workpiece is uniquely identified by its

absolute coordinates.

Example: Absolute coordinates of position 1:

X = 20 mm

Y = 10 mm

Z = 15 mm

If you are drilling, or milling a workpiece according to a workpiece

drawing with absolute coordinates, the tool is moving to the value of

the coordinates.

Incremental workpiece positions

A position can also be referenced to the preceding nominal position.

In this case the relative datum is always the last nominal position.

Such coordinates are referred to as incremental coordinates

(increment = increase). They are also called incremental, or chain

dimensions, since the positions are defined as a chain of dimensions.

Incremental coordinates are designated with the prefix I.

Example: Incremental coordinates of position 3 referenced

to position 2.

Absolute coordinates of position 2:

X = 10 mm

Y = 5 mm

Z = 20 mm

Incremental coordinates of position 3:

IX = 10 mm

IY = 5 mm

IZ = 20 mm

If you are drilling, or milling a workpiece according to a drawing with

incremental coordinates, you are moving the tool by the value of

the coordinates.

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Acu-rite 200S User Manual Page 17