1/01 E Service Instructions
13
Cutting System
All PERFECTA guillotines work
on the basis of what is called the
slant rocking cut, i. e. the knife as
the cutting tool moves along a
curved path from left to right.
All findings and experience
related to the cutting system
regarding the questions of cutting
stock, knives, clamping, cutting
inaccu-racies and their
rectification are summarized in
our "Cutting Compendium" that
you can ob-tain from PERFECTA.
Play in the Knife
Beam Guideways
In addition to many other factors,
a smooth guidance of the knife
beam is a prerequisite to a high-
quality and high-accuracy cut.
Over the years, and depending
upon the working conditions, the
guideways are subject to wear,
although the latter is minimal.
Therefore, the play in the knife
beam guideways should, from
time to time, also be measured
and readjusted, if required.
Machine Sizes 76/92 (Fig. 16)
Knife beam 1 moves between
slide surfaces 2 on the machine
frame and guide strips 3.The guide
strips have been adjusted with
respect to the knife beam with
shims 4 so that gap s required for
establishing the necessary
lubrication film is
< 0.05 mm.
Checking the play:
• Push the knife beam (without
knife) against the frame from the
rear at the top and bottom posi-
tions. Check the play between
the knife beam and the guide
strip on the left and right sides
using a feeler gauge.
• Removing shims reduces air
gap s. Under any circumstances
should it be ensured that the gap
is not too small, as, otherwise,
lubrication is not guaranteed, with
the knife beam tending to get
jammed.
This would result in seizure of the
sliding surfaces.
Whenever the positions of the
guide strips are changed, the air
gap between the knife back and
the clamp edge must always be
checked as described under
"Clamping System" and read-
justed, if necessary.
1
2
3
4
Fig. 16
Machine Size 168 (Fig. 15 )
Slacken upper lock nut 3 on ten-
sion spindle 2 located in clamp 1.
Turn nuts 4 to adjust the clamp
in parallel with the cutting table.
Thighten lock nut 3.
Only adjust the side which shows
the deviation.
3
1
2
4
Abb.15
