46
To safeguard the danger point, a safety distance S must be observed between the
detection zone of the laser scanner and the danger zone. The
SD3-A1
can fulfill its
protective function only if it has been installed and positioned in such a way as to allow for
an adequate safety distance. The safety distance ensures that no body part whatever can
reach the danger point until the hazardous movement of the machine has come to a
complete standstill.
The safety distance S when safeguarding a danger point may be calculated, based on EN
999, by means of the following formula:
S = K × T + C
In this connection please also have regard to the illustrations given in this chapter.
S = Safety distance in mm
K = Approach velocity in mm/s
At a close distance of 500mm, a velocity of 2,000mm/s should be assumed.
If the calculation involves a distance in excess of 500mm, K may be taken
to be 1,600mm/s. But in this case the safety distance is subject to a
minimum value of 500mm.
T = Overall time of delay in seconds,
a total consisting of:
Response time of the laser scanner
Adjustable, max. 200ms
Overtravel time of the machine including the
controls
Based on measurement of
overtravel time
C = 8 × (d - 14) in mm
Added margin dependent on the depth of penetration of the detection zone,
based on the resolution of the laser scanner: C (30mm) = 128mm, C
(40mm) = 208mm
d = The resolution to which the laser scanner
has been set
Here = 30mm or 40mm
Summary of Contents for SD3-A1
Page 1: ......
Page 12: ...12...
Page 40: ...40 Fig 5 4 5 Considering the maximum measurement distance when safeguarding an area...
Page 60: ...60 Fig 6 2 1 Example of a zone pair changeover for an AGV on a curved route...
Page 61: ...61 Fig 6 2 2 Example of zone pair changeover with combined with reducing speed of the AGV...
Page 101: ...101 13 13 Dimensional drawings of the SD3 A1...
Page 102: ...102 13 14 Dimensional drawings of the mounting system...
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