Description:
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The head stage is used to focus the head (roughly) on the very varied thicknesses
of flexo media, it is also used to measure the thickness of each plate as it is loaded
so that distortion calculations can be done correctly. Also when used with a TFX head it
is sent to find the position at which the laser focusses on the drum. This parameter serves
to store the position at which point the TFX laser is focussed on the drum. This parameter is
then used to calculate plate thickness instead of al hsap in the case of 1.7x heads.
This parameter is automatically updated upon successful completion of a stage install tfx command.
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