Safety | 2
DURO-A RC
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Imbalanced workpieces endanger the personnel, the power chuck DURO-A
RC and the machine.
In order to compensate for unwanted imbalances and to prevent resulting
damage, the symmetrical mass distribution must be restored and the power
chuck DURO-A RC dynamically balanced with the workpiece.
2.6.6
Dangers due to Power Failure
An unexpected power failure during operation may lead to immediate failure
of the clamping force of the power chuck. The workpiece may then fly out and
cause serious crushing and impact injuries.
To prevent workpieces flying out, ensure perfect functioning of the power sup-
ply before each operation. In addition, the operator and the machine manufac-
turer must ensure by means of effective safety equipment that the actuating
and clamping forces are maintained without interruption until the machine
comes to a standstill and the workpiece remains tightly clamped.
2.6.7
Danger of Crushing
The machine manufacturer and / or operator must ensure that all danger to
persons due to unavoidable travel movements is excluded. For this purpose,
2-handed operation, for example, or preferably suitable safety guards can be
used.
If there is a gap of
less than 25 mm
after the distance is travelled, there is
generally a risk of crushing extremities. For this reason,
▪ the speed of movement of components moving towards each other must
generally not be reduced to more than 2 m/min (specification as per DIN
EN ISO 23125). This also applies to
commissioning work,
set-up mode
and
service work.
▪ or in the case of clamping equipment with clamping movements where
workpiece loading in normal mode is carried out either mechanically or
with a ramrod.
▪ or the object to be clamped is fixed with a permanently or temporarily at-
tached workpiece holder (e.g. prism) before the movement is started.
▪ or, for example, in the case of cylinders and comparable moving compon-
ents, the gap is to be covered by a safety guard so as to be inaccessible.
