Smithy CNC Mills Bedienungsanleitung PDF herunterladen (Seite 74)

8.3 Fixture Offsets (G54-G59.3 )

Work or fixture offset are used to make a part home that is different from the

absolute, machine coordinate system. This allows the part programmer to set up

home positions f

or multiple parts. A typical oper

ation that uses fixture offsets

would be to mill multiple copies of parts on "islands" in a piece, similar to figure

8-1.

The values for offsets are stored in the VAR file that is requested by the INI file

during the startup of an EMC. In our example below we'll use G55. The values

for each axis for G55 are stored as variable numbers.

5241 0.000000

5242 0.000000

5243 0.000000

5244 0.000000

5245 0.000000

5246 0.000000

In the VAR file scheme, the first variable number stores the X offset, the second

SmithyCNC Programmer’s Reference Manual: Coordinate System

8-3

Figure 8-1 Offsets

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 119 120

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Smithy CNC Mills Bedienungsanleitung Seite 74