February 2012 2 – 15
2 Safety precautions
2.1 Introduction
The safety precautions below are provided to ensure your personal safety and the safety of the
machine tool.
Please read this information carefully before you start servicing the machine!
2.2 Overview
Equipment ground
Zero potential
Fundamental
knowledge
Know-how and
competence
Suitable tools
Ensure that the equipment ground is continuous!
Interruptions in the grounding conductor may cause damage or injury to property or persons.
Ensure that the main switch of the control is switched off and that connected devices are not
under power when you engage or disengage any connectors or terminals.
Take precautions against restart!
Use an appropriate voltage test unit to ensure that the unit is not under voltage!
In order to be able to judge the behavior of an NC controlled machine, service engineers need
to have fundamental knowledge of controls, encoders, drives, electronics and mechanics.
Inappropriate use may cause considerable damage to persons or property.
Technicians who work on the electrical system of the machine must have the required know-how
and competence.
Use suitable tools, e.g. insulated screwdrivers and pincers!
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