Forch F25 Manual Del Usuario página 29

Loose rust and scale as well as paint and filler layers must be removed. When drilling material thickness-
es of less than 12.0 mm, a steel plate of appropriate thickness should be placed under the work piece to
be machined so that the electromagnet can better develop its magnetic holding force. Never place the
switched on magnetic drilling unit on insulating materials (e.g. wood, concrete, etc.). The insufficient heat
dissipation can lead to overheating and destruction of the electromagnets. Always remember that the
magnetic force is not maintained in the event of a mains interruption (power cut, pulling the mains plug).
The magnetic drilling units must not be used on work pieces while arc welding is in progress.
The welding current could damage the machine. The magnetic drilling units are always equipped with a
self-starting lock. The automatic start interlock ensures that only the electromagnet is energised when
the red rocker-type switch is switched on. The drill drive only gets power when the green combination
switch is pressed. Only now does the drill drive start up. If the voltage is interrupted, e.g. due to a defect
in the supply line or by actuating the red rocker-type switch, the drill drive remains voltage-free even after
the voltage returns or after the red rocker-type switch is switched on again.
Before commissioning
Carefully read and observe the operating instructions and safety notes! Correctly establish the
electrical device connection. Note the rated voltage on the type plate! If you want to use an extension
cable, it must be designed for the application and the rated power input of the drilling unit! Caution:
When drilling horizontally and vertically upwards, the magnetic drill stand must be secured with the sup-
plied safety belt in accordance with the accident prevention regulations of the trade associations.
A corresponding belt guide is provided on the drill stands. The drill drive can be adjusted in height with
the Allen wrench (SW6). The set screw is located on the back of the gearbox housing.
Commissioning
Align the drill tip with the grained drill point. Switch on the magnetic drill stand on the red rocker-type
switch "ON". The magnetic drill unit sticks to the work piece through the magnetic field that builds up.
Before the drilling process check whether the magnetic drilling unit is stuck safely. Magnetic drilling units
with fine positioning (recognisable by the clamping lever or in the description of the technical data) enable
the drill tip to be aligned exactly to the drilling point - even when the electromagnets are switched on.
For this purpose release the clamping lever of the fine positioning. The drill stand can now be pivoted
and moved on the electromagnet. After completion of the set-up procedure, the clamping lever is locked
again and the set position is fixed. For multi-stage gear designs, select the speed range of the drill drive
according to the tool to be used.
Caution! Only switch over the speed when the drilling drive is at a standstill! The gear stages are identified
by single and double symbols on the switch. The switching process can be supported by slightly turning
the work spindle by hand. For drill drives with additional electronic speed control, the speed and torque
power can be infinitely varied at the corresponding controller on the drill drive. For drill drives with electrical
speed adjustment, the setting is made using the corresponding setting wheel on the control panel on the
drill stand. For drilling drives with clockwise/anticlockwise rotation change, the switch is made with the
black switch on the control panel on the drill stand.
In position "R" the drill drive rotates clockwise, in position "L" counter-clockwise. Caution! The direction
of rotation may only be changed with the drill drive switched off. The drill drive is now switched on at the
combination switch - green - ON, illuminated. Note: The drill drive can now be started when the electro-
magnet is switched on. The drill feed is now carried out manually via the handle bars. To avoid overloading
the magnetic drilling unit or premature tool wear, the drilling pressure must be adjusted. After each drilling
operation the chips and / or the drill core must be removed.