Installation Manual

30 Commercial in Confidence © Hexagon AB
7.6 Shovels and Excavators
Some vehicles can turn or rotate and hence change their heading without any forward or
backward movement, such as track dozers and shovels. In such cases, it is recommended that a
second QC1000 unit (called beacon) is added so that the direction of movement of the vehicle is
always defined.
7.6.1 Rotating Vehicle with Single Antenna
For tracked vehicles and other vehicles where the orientation of the driver may differ from the
direction of travel the heading information will be discarded once the vehicle enters standstill
(typically after 10 seconds).
Vehicles with unknown heading (e.g. non-moving, tracked, rotating vehicles) are calculated as
circular objects. No threat headings will be displayed to the operator of such vehicles
A typical example of unknown heading vehicle where a second antenna can’t be installed is a
small dozer. For such vehicles the reverse gear must be connected to Hexagon device. This will
significantly improve the heading accuracy.
7.6.2 Rotating Vehicle with Dual Antenna (Beacon)
7.6.2.1 System Diagram
The QC1000 should be installed in the corner of the vehicle, the second QC1000, referred to as a
beacon antenna, should be installed in the opposite corner.
It is necessary to have both antennas as far away as possible but at a minimum of 5 meters.