Wear of knife and grinding stones (see fig.20.)
The knife or the grinding stones are worn if the knife is not ground (or sparks are not
generated when the grinder lever is pulled.)
Loosen the lock nut. Pull the grinder lever. And turn the wing screw counterclockwise
slowly. (The dimension marked by “ * “ fig.20 reduces and the grinding stone nears the
knife.)
Locate a position where sparks are generated normally and tighten the lock nut firmly.
16. Grinding stone replacement
If the knife is not ground though the grinding stone position has bee adjusted in the
correct method. The wheels are worn out. Replace the wheel.
Remove the nut (7-9) shown in fig.17 and replace the wheels with now wheels.
17. Wavy knife
The following reasons are conceivable if the knife becomes wavy. Check for every
reason.
a) Knife deflection due to low knife tension.
(Stretch the knife by turning the tension handle till the stopper (1) comes into
contact with the stopper (2) as illustrated in fig.8 on page 6.)
b) The wheel is pressed against the knife more than necessary. (Refer to para.15.)
c) The wheels run out.
(Align the wheels satisfactorily. Replace the both wheels if they run out because of
wear.)
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