Tecomec Jolly Star Manual De Instrucciones página 9

17. GRINDING WHEEL WARNINGS
- Use a grinding wheel suitable for the type of chain to be sharpened; consult the
chain chart at the end of the manual.
- Do not force the grinding wheel on the hub and do not alter the centering hole
diameter. Do not use grinding wheels that do not fit perfectly in place.
- Use exclusively clean and perfect intact hub and flange to fit the grinding wheel.
- Make sure the outside diameters of the hub and flange are identical.
18. FITTING THE GRINDING WHEEL
- Loosen the screw V10 and turn the guard P10 (fig.14).
- Choose the grinding wheel based on the type of chain to be sharpened (column H
in chain chart).
- Insert and perfectly center the grinding wheel in the dedicated seat on the hub
(fig.14-15).
- Insert the flange F8 and tighten the screw V8 (fig.14).
Make sure you fit the flange as illustrated in fig.15-16.
If the grinding wheel is fitted with the flanges too tight, it could break during
use and put the operator at risk. To avoid such risk, tighten screw M6x25 to
7 Nm (if possible, check with dynamometric spanner).
- Close the guard again P10 and tighten the relative screw V10.
19. CHECKING THE ASSEMBLY OF THE GRINDING WHEEL
- Stand at the side of the grinding wheel, start the grinder and visually make sure
the grinding wheel does not oscillate sideways or crosswise, consequently causing
abnormal vibrations.
- If this should be the case, stop the machine immediately and check if the grinding
wheel has been fitted correctly. If necessary, replace the grinding wheel with another
original one.
Always check a freshly fitted grinding wheel at working speed for at least one
minute before you start grinding, standing at a safe distance and making sure
nobody else approaches the machine.
20. ELECTRICAL CONNECTION
- Make sure the electrical system power supply complies with the values written on
the rating nameplate.
- The power supply voltage must not differ from that written on the nameplate by
±5%.
- The connection to the electric mains must be prepared subject to current standards
in force in the country in which the machine is used.
- The power socket used for the machine must have an earth wire, adequate fuse
and must be protected by a differential circuit breaker with tripping sensitivity no
higher than 30 mA.
21. START-UP
- Block the arm in the completely raised position (the lock pin must be loosened).
- Plug the power cable into the mains.
22. CHECKING THE GRINDING WHEEL SHAPE
- With the machine turned off, check the grinding wheel profile using the dedicated
template (fig.17); if necessary, dress the wheel to restore the correct profile.
23. GRINDING WHEEL DRESSING
Wear personal protection equipment.
- Start the grinder by turning the switch to position "1".
- Once started, the lamp lights up to illuminate the sharpening area.
- Profile the grinding wheel with the dressing brick, always working with extreme
caution, holding it with two hands firmly and effectively (fig.18).
- Stop the machine and check if the profile is correct using the template (fig.19).
Contact with the grinding wheel while it spins at high speed may cause
burning and abrasions.
24. ADJUSTING THE GRINDER
24.1 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 C/D/E).
24.2 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.
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24.3 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.
24.4 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.
24.5 SHARPENING ANGLES FOR CHAINS WITH "DOWN ANGLE"
- Find the setting angles as just illustrated.
- Set another sharpening position: the down angle. To find out which chains require
this setting, consult column E in the chain chart.
24.6 SETTING THE DOWN ANGLE (FIG.25)
RH CUTTER
- Loosen knob M20.
- Swing the vise right inwards until the left reference mark
matches that underneath.
24.7 SETTING THE TOP SHARPENING ANGLE (FIG.26)
- Turn the vise clockwise.
- Position the "DOWN 10" reference mark (right) of the vise by
the desired angle.
- Tighten knob M20 again.
24.8 SETTING THE DOWN ANGLE (FIG.27)
LH CUTTER
- Loosen knob M20.
- Swing the vise right towards the operator so that the right
reference mark matches that underneath.
24.9 SETTING THE TOP SHARPENING ANGLE (FIG.28)
- Turn the vise counter clockwise.
- Position the "DOWN 10" reference mark (left) of the vise by
the angle desired.
- Tighten knob M20 again.
24.10 SETTING THE CUTTING ANGLE (FIG.24)
(right and left cutters)
- Loosen the handle at the back M23 and turn the arm towards
the right. Position the "DOWN 10" reference mark on the
angle desired.
- Tighten knob M23 again.
24.11 SETTING THE CHAIN BLOCKING UNIT (FIG.29)
- Put the chain 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.
24.12 POSITIONING THE CUTTER
- Tighten the pin P17, to release the arm (fig.30).
- 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.
- 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 vertically (fig.31).
- Once you have found the exact position of the cutter, tighten the chain blocking
handle M32 (fig.32).
Pull the handle M32 towards the operator to re-position it to facilitate the sharpening
process.
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