controlled placement it is possible for no light to be discharged from the radiation source 2 out of the interior of the protective housing 10 as a function of the determination by the safety initiator 39 a corresponding action thus can be triggered in order to guarantee the safety conditions for the operation of the guided marking system 1 fig2 shows a perspective view of the support frame 12 from a view from above as already mentioned in the description to fig1 the protective housing 10 is provided underneath the laser base 18 the protective housing 10 also carries the camera 4 in the laser base 18 an opening 22 is formed into which at least one part of the optical system 25 of the radiation source 2 projects see here fig4 and fig5 the protective housing 10 is closed by a base plate 36 the at least one safety initiator 39 is mounted on the outer wall 10 a of the protective housing 10 a drive 31 is also provided on the protective housing 10 with this drive a mirror 30 can be pivoted from a first position 30 1 into a second position 30 2 see here fig4 and fig5 in fig3 the support frame 12 is shown in a perspective view from below the base plate 36 has an opening 37 the opening 37 is thus arranged opposite the area of the surface 101 of the workpiece 102 on which the marking 100 is to be applied at least one lighting device 6 is provided on at least one inner wall 10.