Sonic Tracker Placement in Relation to Screed
P/N 7010-0341 www.topconpositioning.com
6-11
Figure 6-13. Incorrect Placement of Tracker at Tow Point
If any of the forces acting on the screed change, then the screed
will rise or fall without the tracker sensing the movement. For
example, if the amount of material in front of the screed was
decreased, the head of material force (“M”) also decreases and
the screed would begin to fall (Figure 6-14). However, the sonic
tracker would keep the tow point cylinder on grade, but not the
screed since there is no feedback.
Figure 6-14. Tracker at Tow Point Causes Erroneous Corrections
Grade
Reference
S
onic
T
racker
II
Desired Gra
S
onic
T
racker
II
Incorrect Placement