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GKD Technik Ltd
M3000007
SpaceGuard Systems
Introduc�on
The 3RCI+ SpaceGuard system adds dual sensing and processing of machine component posi�on to the
standard system. This allows the system to provide improved electronic stops for the height and slew
limits and for virtual walls.
There are two independent angle sensors fitted to each of the stub boom, fore boom and dipper.
In addi�on, a second means of measuring the machine slew posi�on is fitted. These angle and slew
sensors are compared con�nuously against each other and if a calculated error between the safety and
standard computers occurs a
“Safety Mismatch”
message is shown on the screen and the machine will
stop motion.
The SpaceGuard also incorporates slow zones to allow the system to stop the machine movement within
the set limits even if it is being operated at speed. SpaceGuard evaluates the speed of opera�on and uses
pre-emp�ve stopping to stop motion before the limit is reached.
Opera�on
Please read the sec�on in the main manual on the se�ing of virtual walls and slew/height limits. The
manner of se�ing these limits has not changed in the SpaceGuard system. However, the opera�on of the
machine is now affected when using limits.
Default height limit
On system start up, a default height limit will be imposed automa�cally. This height limit is set at
3.500 meters. Should a height limit not be required, the height limit will need to be disabled a�er start up
every �me the system is turned off. If a different height limit is required, the height limit will need first to
be turned off, and then an alterna�ve height limit will need to be set (see the sec�on on se�ing a height
limit on page 16 of this manual).
Slow zones
In accordance with the Network Rail remits for working under overhead electrics and with an adjacent
line open, whenever an angular slew limit or virtual wall is set and ac�ve, the slew speed of the machine
will be reduced to a maximum of 2 meters per second measured at the bucket pin with the boom at full
reach.
When the machine is in proximity to a slew limit or virtual wall the system will automa�cally select a
further slow mode, where the slew speed of the machine will be further reduced to 1 meter per second.
When working with height limits, full machine boom speed will be available when working away from a
set height limit, but as the boom approaches an ac�ve height limit boom speed will be reduced.