Bosch rexroth ctrlX SAFETY SafeMotion Applications Manual page 83

Values for "Safely-limited speed"
In accordance with the Machinery Directive 2006/42/EC, the manufacturer of
the machine must carry out a risk assessment. On the basis of the risk assess-
ment, the values for limited speeds must be determined.
The following list contains guide values for different types of machines (excerpt
from standards and working papers on safety measures for special mode). The
abbreviation "SLS" means "Safely-limited speed", the abbreviation "SLI" means
"Safely-limited increment".
Machining centers
● Axes: SLS=2 m/min + hold-to-run control
● Spindle: SLS=nn rpm + hold-to-run control + enabling control (choose nn in
Automatic lathes
● Axes: SLS=2 m/min + hold-to-run control, SLI=6 mm + hold-to-run control
● Spindle: SLS=50 rpm (1 rps) + hold-to-run control + enabling control
Drilling and milling machines
● Axes: SLS=2 m/min + hold-to-run control
● Spindle: SLS=nn rpm + hold-to-run control + enabling control (choose nn in
Robots
● SLS=15 m/min + hold-to-run control
Automated manufacturing systems
● SLS=2 m/min (15 m/min) + hold-to-run control + emergency stop
Printing and paper converting machines
● General: SLI=25 mm+ hold-to-run control – or - SLS=5 m/min (max. 10 m/
● "In particular": SLI=75 mm+ hold-to-run control – or - SLS=5 m/min (max.
R911404905, Edition 02
Safety functions in special mode "Safe motion SMMx"
Lethal injury and/or property damage caused by unin-
DANGER
tended axis motion!
⇒ If external force influences are to be expected with
the safety function "Safely-limited speed", e.g. in the
case of a vertical axis, this motion has to be safely pre-
vented by additional measures, e.g. a mechanical brake
or a counterweight.
Injury and/or property damage caused by deviation from
WARNING
standstill position!
⇒ When using the safely-limited speed for axes with
external force influences, error situations (e.g. mains
failure, controller defect) can occur in which the drive
controller can no longer keep the axis in position. In
this case, the axis must be kept in position by additional
measures (e.g. mechanical brake). In the time between
the occurrence of the error and the triggering of the
"additional holding device", axis motion can occur. This
has to be taken into account for the risk assessment of
the installation.
For such axes, Bosch Rexroth recommends using the
safe braking and holding system.
such a way that standstill is reached after 2 revolutions)
such a way that standstill is reached after 2 revolutions)
min) + hold-to-run control
10 m/min) + hold-to-run control
ctrlX SAFETY "SafeMotion"
Bosch Rexroth AG
83 / 302