User's Manual

22 LS420 Universal User Manual V2.91 2003-01-21.doc
2.6.3 Radius parameters for a hydraulique crane.
The radius calculation parameters in green must be measured on the crane and set into the
advanced menu in the LS420 display.
The radius equation is roughly:
slew offset
+ boom length x cos(angle)
+ sheave length x sin(angle)
+ sheave radius
= radius
The slew offset is the distance between
the boom pin and
the center of rotation.
If the boom pin is behind the center of
rotation, the value must be negative.
(Your measurement)
Sheave radius.
(Your measurement)
Crane center of rotation
Boom base pin
Boom length: distance
from boom base pin to
head sheave center.
The sheave head length is the distance
between the boom centerline and
the
center of the lower sheave.
(Your measurement)