If you are unable to achieve an acceptable cut with just a light contact by performing the above
adjustments then the blades have become a little blunt and will need back-lapping.
Once the blade is cutting paper on both sides
you need to check that you do not have
excessive blade contact.
To do this you need to use another strip of paper
but this time hold it flat along the surface of the
bottom blade as shown.
When you rotate the cutting cylinder the paper
should not be cut but should just leave an
indentation line in it. If it does this it is set ok. If
it cuts the paper then the contact is too great
and the cutting cylinder will need to be raised by
rotating the adjusting nuts clockwise.
Repeat these exercises until the paper is cut
across the full width of the unit when held
square to the bottom blade, but just leaves an
indentation line in the paper when it is held flat
along the bottom blade.
Once this is achieved the blades are correctly
adjusted.
