12
In the Event of a Blockage or if the Machine
Stalls
If the machine stalls during use, the most likely cause is excessive pressure
being applied to the feed hand wheel. Simply reducing the pressure will
usually allow the drill bit to return to full speed.
In the event that the machine stalls due to a blockage that prevents the drill
bit from rotating, immediately switch the machine off by pressing the red
button marked ‘O’ on the switch.
Locate and rectify the source of the blockage and check that there is
sufficient tension on the drive belt. Rotate the chuck by hand to ensure free
rotation of the drill bit.
To re-start the machine press the green button marked ‘I’ on the switch.
In the Event of a Power Failure
The drilling machine is fitted with a no volt release (NVR) switch to protect
the user against automatic starting of the machine when power is restored
after a power failure.
In the event of a power failure, first locate and rectify the source of the
failure. If the fault is within the power circuit of the workshop, there may be
an underlying cause (circuit overload etc.) that should be investigated by a
qualified electrician, before attempting to restore the power source.
Once the power is restored, the machine can be re-started by pressing the
green button marked ‘I’ on the switch.
Using the Depth Stop
The machine features a depth stop on the right hand side of the head
assembly
(Fig. 8.6)
.
To set the machine to control the depth of the chuck movement, firstly
ensure the chuck spindle is fully retracted by turning the feed handle
clockwise as far as it will go. Loosen the depth scale lock
(Fig. 8.6)
and
rotate the depth scale to the desired depth, in this case 20 mm, by aligning
it with the depth scale indicator
(Fig. 8.7)
and tightening the depth scale
lock. The depth is now set to 20 mm and by turning the feed handle anti-
clockwise to lower the chuck, it will only travel 20 mm downwards.
Fig. 8.6
Fig. 8.7
Depth scale
indicator
Depth scale
Depth scale lock
8. Operation - cont.