Drilling - Sima DRILL-4 Manual De Instrucciones

7.6 DRILLING

WARNING: Before plugging the machine, make sure the feeding voltage matches with the voltage
of the machine. If the voltage does not match, this can cause irreparable damages to the engine.
1. Connect the machine to the hydric network.
2. With the engine completely stopped, select the right drilling speed.
3. Open the water valve.
4. Connect the engine and keep the crown away from the surface to drill.
5. Approach the crown slowly to the surface to drill, exerting a little pressure on the rig handle during the
first centimetre of drilling for a proper start. Correct the alignment of the crown if necessary at start in
order to avoid excessive frictions or deviation of the crown from the drilling line. A bad setting of the
crown can cause the machine to lose power or to be blocked. The same will happen if the machine is not
well anchored to the ground.
6. If you note the crown can no more continue drilling after having made several corrections, proceed with
larger diameter drills (15 and 20mm) in the same axis without moving the rig.
7. When you have made a passing or non passing drilling, do not close the water valve until the crown
is completely drawn.
8. Once the crown is extracted and no more drilling is being made, introduce some compressed air through
the water pipe, in order not to leave any remains of water inside, since inferior temperatures to 0º could
freeze the water and cause damages.
9. Extracting the stick: When drilling horizontally or vertically upwards, the stick remains within the
crown. To remove it, unscrew the crown; place it vertically so that the stick goes out by its own weight.
Strike the frame gently with a hammer of wood or plastic if necessary. Do not hit the crown violently
against walls or metal objects; otherwise, the former can be deformed. If the stick stays inside the crown
and would not get out, try then with a chisel.
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ENGLISH