- 10 -
699-41-20.1
3
Life expectancy
3.1
Kinematics
DriveSets are subject to normal mechanical wear and tear. According to
axle type, i.e. spindle or cogged V-belt drive, different running times can
be reached. This applies however only when used in accordance to the
warranted characteristics as well as regularly performed maintenance. To
make sure of an even distribution of the lubrication in the linear axes,
the trajectory paths must be greater than the carriage length.
3.2
Motors
Both stepping motors and hybrid stepping motors work without collec-
tors; their life expectancy is limited mainly by bearing deterioration.
3.3
Hybrid cables
Through constant motion, the cables are subject to wear and tear, espe-
cially those in drag chains. The operating life of bending radii with a 10-
fold size of the cable diameter (8 mm) amounts to more than 2 million
cycles. Smaller bending radii (minimum 5-fold size of the cable diameter)
this amount declines. In the case of non-moving hybrid cables, bending
radii which are smaller than the 2-fold size of the cable diameter are not
permissible.
3.4
Xemo controllers
The Xemo controllers have a life expectancy of about 8 years. Once this
period is exceeded, problems can arise because of aged condensers in
the power supply and the final stages.
The electromechanical components with moving switch contacts have a
life span of more than 50,000 switching cycles. This includes on/off
switches, feelers and probes, emergency stop switches, sliding gates and
relays (operational elements vary according to the type of controller.
Membrane keyboard keys have a life span of more than 1,000,000 hits.
The hand wheel works optically and is correspondingly virtually void of
wear and tear. The override-POT can make more than 20,000 adjust-
ments without aging problems
