ALFRA Optibohr 80X Manuel D'utilisation page 15

Motor emergency stop
The core drilling machine has an automatic emergency stop. If the magnet, while working with running motor, is
pushed off the ferromagnetic workpiece by overload, vibrations or other causes and an air gap occurs between
magnetfoot and workpiece, the motor will be deactivated automatically and the magnet-LED is steady red. The
motor though will not be slowed down!
A restart of the machine is only possible after switching the magnet on and off.
Deactivating the sensor and the automatic motor emergency stop
Depending on the version of your core drilling machine it is possible to momentarily deactivate the sensor and its
safety appliance.
Should at one of your applications, with switched on magnet, the signal-LED light permanently red, it is due to a too
weak magnet field for the sensor in the first coil of the electromagnet.
Press the motor off button for 2 seconds to momentarily deactivate the sensor and its safety appliance.
Once the LED no longer lights up, you can turn on the motor. After completion of the drilling process, you have to
deactivate the safety appliance by pressing the off button.
In this case the motor emergency stop will be deactivated.
Risk of injury!
Exclusively the user is responsible for an appropriate, safe use of the core drilling machine.
15