Hoffmann MORSO NM, Руководство по эксплуатации

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Instruction Manual
MORSØ Notch Cutting Machine
Model NM
21
Grinding of Knives
When grinding the knives you must only grind on the reverse of the cutting edge. You must under no
circumstances grind on the front or ends of the knives, because the knives will then be useless. The
angle of the cutting edge compared to the front of the knife must be 28°.
Hollow grinding (essential), figure I.
Using a grinding wheel the diameter must be between 200 - 300 mm. Using a cup wheel the diameter
must be 150 mm.
Surface grinding figure II
Honing figure III
To set the cutting edge, use a soft fine-grained silicon carbide hand flat stone that must be kept in oil
or kerosene.
When setting the cutting edge you must under no circumstances sharpen the cutting edge
lengthwise, always crosswise.
First sharpen on the reverse side of the knife. The flat stone is to be kept in an angle of 29° compared
to the front of the knife.
Take off burrs , figure IV
After the honing the burrs on the front of the knife will be removed with a slate flat stone which must
be straight.
The flat stone must be completely in line with the knife, otherwise the outer cutting edge will get an
incorrect angle.
Even the slightest error here will cause the knife to press too hard against the wood during the
cutting.
Service H-3