Sizing
Warning:
These calculations are from ANSI/ RIA15.06 contact RIA for a copy of this
document. Other federal, state, and local regulations may be applicable for
your applications.
Smartscan
Incorporated makes no warranty of any kind with regard to this material,
including but not limited to, implied warranties or fitness for a particular
purpose. The information in this document is subject to change without
notice. Smartscan shall not be liable for any errors contained herein for
incidental or consequential damages in connection with the performance of
use of this material.
Basics: Object Sensitivity and
Detection Zone
Safety
Distance Formula: ANSI/RIA 15.06
Ds
= [K x (Ts + Tc +Tr)] + Dpf
Ds
= minimum safe distance between a safeguarding device and the hazard.
K
= Speed constant. 1.6 m/sec (63 inches/sec) minimum based on movement being
the hand/arm only and the body being stationary.
Note:
A greater value of K may be required in specific applications and when
body motion must also be considered.
Ts
= worst stopping time of the machine/equipment
Tc
= worst stopping time of the control system
Tr
= response time of the safeguarding device including its interface.
Dpf
(Depth penetration factor) = maximum travel towards a hazard within
the presence sensing safeguarding devices field that may occur before a stop
is signaled.
Dpf
will change depending upon the application
Click
on the picture or high-lighted text of the light curtain orientation of
choice. These pictures assist in calculating the Depth penetration factor (Dpf)
portion of the safety distance formula.
Vertical
Applications: Assuming that there is no other safe guards and no
physical obstructions limiting access to the hazard.
Objects
Sensitivity less than 64mm
Object sensitivity equal to or greater than 64 mm
Horizontal
Applications: Assuming that there is a physical obstruction
limiting access to the hazard.
Horizontal
Applications: Assuming that there are no other safeguards and no
physical obstructions limiting access to the hazard
Angled
Approach: Assuming that there is a physical obstruction limiting access
to the hazard.
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