Half cuts (mainly used for opening features or to die cut self-adhesive materials) are used to perforate or die cut to some extent the thickness of the processed material. Some of the materials are very thin, others made of several layers partly containing barrier functions. For this reason half cuts or half perforations need to be controlled exactly. Schobertechnologies develops, designs and manufactures high precision modules with micro gap control features. Conical running rings on the converting tools (Gap Control System) are one of the elements allowing a micrometrical adjustment of the cutting gap. Another element are electronically controlled spindles.