Makita DBM230 Operating Instructions Manual page 24

Connect the drill mount and the vacuum pump. Bring the drill mount in the correct
position and switch the pump on.
Check whether all 4 levelling screws in the foot plate are completely turned back
and a vacuum of min. -0.8 bar is achieved. By pressing the valve button on the
handle the drill mount may be disengaged and readjusted.
The vacuum pump has to run during the complete operation, it is to be
placed in such a way that you can always observe the pressure gauge. It is
mandatory to check that the foot plate is firmly affixed before you start
drilling.
Fixing the mount by means of clamping device
In order to brace the drill mount by means of a clamping device, the
distance between the opposite wall must be between 1,7 m and 3 m.
H
G
Caution! The drill stand must be firmly connected to the surface. Otherwise
the operator might suffer injuries or the drill could be damaged.
Uncontrolled movements during drilling will cause the drill bit to hit the
surface to be drilled, this may cause chipping of the segments. The drill bit
might also tilt in the borehole which will also damage it.
Screw the plug-in nipple into
the foot plate, to which
previously seal strip has
been applied. Insert the
vacuum handle with the seal.
Position the drill mount. Position the clamping device as
close as possible behind the column on the base of the
mount. Fix the mount by turning the crank (G) clockwise.
Secure the installation with the appropriate bolt (H).
Fasten the vacuum handle with a
washer and hexagon hollow head plug
M8x30.
23