a) a hold-to-run control device for the movement of the
fence, whose safety related parts of the control system
(see also 5.2.1) shall conform to 5.2.7; or
b) reduction of the speed of the fence toward the fixed
parts of the machine to a maximum of 1 m min
-1
in the
area of 150 mm between the fence and the fixed parts
of the machine. The control system for reduced speed
shall conform at least to PL=c in accordance with the
requirements of EN ISO 13849-1:2008. In addition an
emergency stop control device shall be reachable from
the possible crushing/shearing position.
As an exception to a) a powered movement in that part of
a shearing/crushing area between 25 mm and 150 mm
may be possible without control by a hold-to-run control
device if the force exerted by the moving part is not
exceeding 150 N at the maximum speed of the
movement.
The safety related part of the control system for limiting
the powered movement force shall be at least PL=c in
accordance with the requirements of EN ISO 13849-
1:2008.
Verification: By checking the relevant drawings and/or
circuit diagrams, measurement, inspection of the machine
and relevant functional testing of the machine.
Access to all drive mechanisms shall be prevented either
by a fixed guard or a movable guard interlocked with the
saw spindle motor(s) drive in accordance with the
requirements of EN 1088:1995+A2:2008.
If the fixed guards are to be demounted by the user e.g.
for maintenance, their fixing systems shall remain
attached to the guards or to the machinery when the
guards are removed, e.g. with un-losable screws, see 6.3
jj).
On circular saw benches where speed change is
achieved by changing the position of the drive belts on the
drive pulleys that part of the guarding system which has to
be opened for changing the drive belts position shall be
interlocked with the saw blade spindle drive motor(s).
The safety related part of the control systems (also see
5.2.1) for interlocking functions shall conform to 5.2.8.
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