D2X
D2X Operator’s Manual
13
3.4. Control system of the electromagnetic base holding force
The D2X drilling machine incorporates a holding force control system to monitor the
clamping
of
the
electromagnetic
base
to
the surface. The force value depends on
several factors, such as type, thickness, flatness, and roughness of the surface,
presence of paint, rust or other contaminants, fluctuations of supply voltage, and the
wear of the electromagnetic base bottom.
If the holding force falls below a safe operating value, the control system will not
allow the machine to operate. Additionally, the system will prevent the startup of the
motor
on
a
surface
thinner
than
5
mm
(0.2’’)
because
such
thickness
does not provide
sufficient holding force. In such a case, the holding force will be only about 25% of
the force attained on a standard 22-
mm (0.87’’) flat plate.
If the motor does not continue operation after the green MOTOR button is pressed
and released, it means that the control circuit is operating properly and preventing
further drilling because the holding force is too low.
3.5. Preparing
Before beginning, clean steel parts, especially the MT2 shank, from anti-corrosion
coating used to preserve the machine for storage and transport.
Screw the spoke handles into the feed shaft. The feed shaft can be installed at
the opposite side of the drilling machine to allow working in places hard to reach or
using the machine by a left-handed person.
Select the proper annular cutter or drill bit based on the hole size desired. Next,
use a clean and dry cloth to wipe the spindle, arbor (drill bit), and cutter, and then
install
the
arbor
(and
then
the
cutter)
or
the
drill
bit as described before.
Position the machine on a flat ferromagnetic surface (some types of stainless and
acid-proof steel do not conduct magnetic flux) with a thickness of at least 8 mm (0.3
’’).
The workpiece must be clean, without rust or paint that decrease the holding force of
the electromagnetic base.
Connect
the
drilling
machine
to
the
power
source, and set the MAGNET switch to
the position ‘I’ to turn on the clamping of the electromagnetic base.
Use the safety chain to prevent the machine from dropping and avoid possible
injury to the operator if the machine loses magnetic clamping in case of a power loss.
To protect the machine, attach it to a fixed
structure
by
fastening
the
chain
to
the
lugs
