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2
A
B
2
BASIC FUNCTION
C
B
C
C
A
C
D
A
B
The blade's drive and control
systems
Eccentric drive
The unique concept behind the K950 Ring is its
eccentric drive (outside the centre) and control of
the cutter blade (A).
Function
The drive disc (B) which is powered by a belt dri-
ven off the engine, has a groove into which the
blade slots.
The two engagement rollers (C) exert pressure
against the blade (from the engagement roller
springs, when the knob is tightened), causing the
blade to press against the drive disc. The lower
picture shows how the engagement roller flanges
grip in the cutter blade's groove. The only function
of the support roller (D) is to exert counter-pressu-
re so that the blade is located properly against the
rollers without any play or clearance.
With this design, the cutter blade can be con-
trolled in both the radial and axial directions (rota-
ting and lateral movements). Three points (at the
two engagement and support rollers and at the
drive disc) guide the blade at the same time as the
pressure against the drive disc generates sufficient
friction to drive the blade.
Important for good function
The description of the function indicates that it is
particularly important that the engagement rollers
can move axially without interference from the
spring force (the direction of the arrows), so as to
provide the correct pressure against the drive disc.
Corrosion or dirt that blocks movement will cause
the blade to slip against the drive disc. A properly
greased bearing housing will reduce the risk of
operational disruption.
D
Wear
In comparison with a traditional centre-driven
machine, the blade's drive and engagement
systems are subjected to harder wear since the
mechanical parts work constantly in an environ-
ment of water and slurry.
Parts subject to wear
The wear-prone parts are the drive discs, engage-
ment rollers and support rollers (B, C and D in the
figure). These parts can be quickly and easily re-
placed and this job is normally carried out by the
user.
(The machine comes with a video that provides a
detailed description of the service measures that
the user should carry out.)
IMPORTANT
In all control and adjustment work on the engage-
ment and support rollers, the knob that tensions
the blade against the drive disc must be unscrewed
to its end position. Make a habit of starting off
each shift by unscrewing the knob and finish-
ing your shift by screwing it back in!
108 89 37-26
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