D250X
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3.3. Monitoring system of the clamping force
The drilling machine has a system that monitors the clamping force of the electro-
magnetic base. The force will be lower if there is rust, paint, chips, or dirt. The force
will be lower also if the surface is thin, rough, not flat, not rigid, the voltage is lower
than required, or the bottom of the base is worn.
If the clamping force is too low, the system will not allow the machine to operate.
Then, after you release the green MOTOR button, the motor stops. This happens on
a surface thinner than 5 mm (0.2″). The clamping force is then only about 25% of the
force that you can get on a flat plate that is 25 mm (1’’) thick. Then, to drill on thin
plates, press and hold the green MOTOR button.
3.4. Preparing
Before use, clean steel parts, including the spindle, from anti-corrosion material used
to preserve the machine for storage and transport.
Attach the handles to the feed shaft.
Select the annular cutter or drill bit that matches the required hole diameter. Use
a dry cloth to clean the spindle and the cutter. Then, install the cutter as described
before.
Put the machine on a flat ferromagnetic workpiece with the thickness of at least
8
mm (0.3″). Make sure that there is no rust, paint, chips, or dirt. They decrease the
clamping force. The force will be lower also if the surface is thin, rough, not flat, not
rigid, the voltage is lower than required, or the bottom of the base is worn.
Connect the machine to the power source. Set the MAGNET switch to ‘I’ to turn
on the clamping. Some types of steel (non-ferromagnetic) do not conduct magnetic
flux so the machine cannot clamp onto them.
Use the safety strap to prevent fall and injury if the machine loses the clamping.
Attach the machine to a stable structure by putting the strap through the hole in the
machine body. In the horizontal position, attach the strap to the carrying handle.
Make sure that the strap is tight and not twisted. If the machine comes loose from the
workpiece and hangs on the strap, replace the strap. Do not put the strap into the
buckle from the front.
