User's Manual

GM550 v1043 FCC-IC.doc Revision 2 45
Radius Parameters for a Hydraulic Crane
The radius calculation parameters in green must be measured on the crane and set into the radius
settings in the GS550 display.
The sheave head length is the distance
between the boom centerline and the
center of the lower sheave.
(Your measurement)
Sheave radius.
(Your measurement)
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)
Crane centre of rotation
Boom length: the distance from the boom
base pin to the head sheave centre
Boom base pin