# Pre- and post-files

For this cycle there are 2 pre-files which must be called before this cycle and 2 post-files which are called after each cycle.

These files are optional.

As required, these files can be created as a subroutine.

You can make machine-.specific modifications in this file, such as:

- Extend laser
- Retract laser
- Activate the touch probe etc.

There is a general pre file and a general post file which are used for all SysMeasWcs cycles.

- SysMeasWcsPre.nc
- SysMeasWcsPost.nc

In addition there is normally a separate file for each cycle and this is only valid for this particular cycle.

Cyclename +Pre or Post +.nc

- SysMeasWcs1Pre.nc
- SysMeasWcs1Post.nc