ISG CSV format

Description

The simplest and most flexible file format is a tabular ISG CSV format.

In terms of its structure it is very similar to an Excel spreadsheet.

• The columns are named in the header. The header can contain both argument and parameter names.
• The actual records are specified in the rows below.
• Row comments start by a double slash "//".
• A "file break" can be created with a hash "#". After this break, a new header and the associated records can be specified.

Programing Example

Machine position errors

// The header only contains position errors.

Y0A    Z0A    X0B    …

// Position errors are typically (but not necessarily)

// constant. Therefore, one data row is usually sufficient here.

0.1    0.2    0.11   …

Programing Example

Component errors of the X axis

// The header contains the argument "X" and component errors.

X      EXX    EYX    EZX    EAX    EBX    ECX

0.0    0.02   0.01   0.07   0.00   0.0042 0.003

10.0   0.00   -0.1   0.01   0.00   0.0011 0.002

…

// Further records depending on X

Extended functional dependencies

Any functional dependencies can be implemented in the ISG CSV format. For example, it is conceivable that two data blocks for component errors in the X axis, one each for Z = 0 and one for Z = 100, must be specified due to sag effects on the machine. Parameters are interpolated as described in Section “File formats supported”.

Any higher-dimensional dependencies can be implemented with this method.

Programing Example

Component errors of the X axis for Z = 0 and Z = 100

// The argument "Z" now crops up in the header.

Z      X      EXX    EYX    EZX    EAX    EBX    ECX

// In the first block Z is always = 0.

0.0    0.0    0.02   0.01   0.07   0.00   0.0042 0.003

0.0    10.0   0.00   -0.1   0.01   0.00   0.0011 0.002

…

// In the second block Z is always = 100.

100.0  0.0    0.01   0.02   0.03   0.07   0.0040 0.003

100.0  10.0   0.03   -0.09  0.03   0.06   0.0015 0.000

…