Sharpening Warnings - Oregon 510A Manuel D'utilisation

24.1 RIGHT CUTTER VISE ROTATION (FIG. 20-21)
- Loosen the knob M20.
- Turn the vise clockwise.
- Position the vise reference by the required angle.
- Tighten the knob again M20.
24.2 RIGHT AND LEFT CUTTER ARM ANGLE (FIG. 23)
- Loosen the knob at the back M23 and turn the arm to the right.
Position the reference by the required angle.
- Tighten the knob again M23.
24.3 ADJUSTING THE CHAIN BLOCkING UNIT (FIG.29)
- Move the right cutter up against the chain blocking unit A29.
- Turn the knob P29 to position the blocking unit A29 correctly compared to the
cutter.
24.4 POSITIONING THE CUTTER
- Move the grinding wheel onto the right hand cutter, by pulling the arm
downwards.
- Turn the knob P30 to move the chain so that the cutting part of the cutter skims the
grinding wheel (fig. 30). The chain should run smoothly over the vise throughout
this procedure but without any clearance.
24.5 LEFT CUTTER VISE ROTATION (FIG. 20-22)
- Loosen the knob M20.
- Turn the vise anti-clockwise.
- Position the vise reference by the required angle.
- Tighten the knob again M20.
- Move the left cutter up against the chain blocking unit A29.
- Move the grinding wheel onto the left cutter, by pulling the arm downwards. The
grinding wheel must skim the left cutter by the same amount as the right cutter.
- If the difference is considerable, it means that the chain is not centred exactly
and you need to progressively and slightly turn the screw V20a until you find the
correct position.
- Turn the vise onto the right cutter and check if it is centred again by lowering the
arm.
- The vise adjustment phase is complete once both cutters (right and left) are
perfectly centred with the vise rotation point.
25. ADJUSTING THE GRINDER
It is obligatory to sharpen a chain with the gauge of the drive link identical to the
sample chain used in the previous vise adjustment phase.
25.1 SHARPENING ANGLES
- Once you have established the type of chain to be sharpened, look-up the adjust-
ment angles (vise and arm) in the chain chart (columns A/C).
25.2 SETTING THE TOP SHARPENING ANGLE (FIG.20-21)
RH CUTTER
- Loosen the knob M20.
- Turn the vise clockwise.
- Position the "0" reference mark on the vise by the desired
angle.
- Tighten knob M20 again.
25.3 SETTING THE TOP SHARPENING ANGLE (FIG.20-22)
LH CUTTER
- Loosen the knob M20.
- Turn the vise counter clockwise.
- Position the "0" reference mark on the vise by the desired
angle.
- Tighten knob M20 again.
25.4 SETTING THE CUTTING ANGLE (FIG.23)
(right and left cutters)
- Loosen the knob at the back M23 and turn the arm towards the
right. Position the "0" reference mark by the angle desired.
- Tighten knob M23 again.
25.5 SETTING THE CHAIN BLOCkING UNIT (FIG.29)
- Put the chain to be sharpened in the vise.
- Take the cutter up against the chain blocking device A29.
- Turn the knob P29 to position the blocking unit A29 correctly compared to the
cutter.
25.6 POSITIONING THE CUTTER
- Move the grinding wheel onto the cutter to be sharpened by pulling the arm
downwards.
- Turn the knob P30 to move the chain so that the cutter cutting edge skims the
grinding wheel (fig.30). The chain should run freely over the vise throughout this
procedure but without any clearance.
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- At this stage, raise the arm and screw the knob P30, to move the cutter to be
sharpened further forwards.
This forward movement corresponds to the quantity of material to be ground
from the cutter.
Blunter the cutters, greater must be this forward movement. Vice versa, for cutters
that are not too blunt, simply grind just a slight amount of material.
- Turn knob P31 to adjust the cutter sharpening depth. The grinding wheel should
skim the bottom of the cutter gullet (fig.31).
- Once you have found the exact position of the cutter, tighten the chain blocking
handle M32 (fig.32).

26. SHARPENING WARNINGS

- Wear personal protection equipment when sharpening.
- All adjustments must be made with the motor switched off and the grinding
wheel completely stopped.
- In the case of accidental impact or collision of the wheel during the sharp-
ening process, follow the instructions given in the "GRINDING WHEEL
WARNINGS" section.
- Clean the chain before sharpening it.
- To avoid overloading the motor excessively and to avoid damaging the chain cut-
ters, grind minimum quantities of material and do not stop along the same cutter
as this could burn the cutting edge.
- Do not use liquid coolants when sharpening.
- Sharpen all cutters on the same side and then sharpen the cutters on the
opposite side by adjusting the vise as explained in the previous sections.
27. SHARPENING THE CHAIN
- Make sure the vise blocking handle M32 is screwed tight and the chain is
blocked.
- Turn the machine on using switch I33 and sharpen the cutter by lowering the arm-
motor unit (fig.33).
- Once you have sharpened the chain, raise the arm and loosen the handle M32.
- Run the chain forward to position the next cutter to be sharpened.
- Block again with the handle M32 and sharpen.
28. GRINDING WHEEL DRESSING FOR SHARPENING THE DEPTH GAUGE
- Fit the 1/4" (6 mm) thick grinding wheel (fig.37), following the instructions given in
points 13-17-18-19.
- Turn the vise so that the "0" reference mark is on position 0 (fig.38).
- Turn the arm to take the "0" reference mark to 10°/15° (fig.38).
- Position the dressing brick on the jaws and against the chain blocking unit
(fig.38).
Hold the dressing brick firmly with one hand (being careful not to touch the
grinding wheel).
- Profile the grinding wheel by activating the machine and grind the grinding wheel
until you obtain a profile like the one illustrated in fig.38.
- Switch the machine off once you have finished.
29. SHARPENING THE DEPTH GAUGE
- Remove the dressing brick and put the chain in the vise.
- Center the cutter compared to the grinding wheel by turning the knobs (P29 and
P30).
- Keeping the arm tilted, adjust the grinding depth on the gauge by turning knob P31
(fig.39).
- Sharpen the gauge following the instructions given in the "SHARPENING" section.
For this type of sharpening procedure, there is no difference between the right and
left cutters, therefore sharpen all the gauges one after the other.
- Check if the depth gauge is correct, using the template with the shape related to
the type of chain used (fig.40). Please also consult the chain table, column F.
30. STOPPING AND SHUTTING DOWN
30.1 STOPPING
Turn the machine off by turning the switch to position "0" and unplug the power cable
from the mains.
30.2 SHUTTING DOWN
Once you have finished using the machine, disconnect it and clean it thoroughly.
Store it in a dry and safe place, protected against dust and damp.
30.3 ROUTINE MAINTENANCE
Follow the instructions given in the "STOPPING" section before you start to
work on the machine.
Maintenance frequency
When the grinding wheel reaches a
minimum diameter of approximately
105 mm
40 hours
Operation
Replace the grinding wheel.
Clean the grinder carefully using a rag or
a cleaning brush.
Clean the electric motor and the sliding
guides with caution.
Do not use compressed air.
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