The required personal protective means should be provided by the User. All protective equipment should be periodically inspected. Machining of each first work piece according to a new technological programme should be carried out with attendance of a process engineer who created the programme. It should be carried out along with a suitable operator's training. The condition of the signalling lamps should be systematically checked according to the following procedure: press the push button TEST OF SIGNALLING LAMPS located on the control panel; check if all signalling lamps and lighted buttons light and, if necessary, replace burned bulbs.