SFWR GP-A4039 5247195 - Caterpillar

Illustration 1 g00563437
Angle of Attack (A) The angle of attack is the angle of the screed bottom plate in relation to the line of pull. The normal angle of attack for the screed is between 3 mm (0.125 inch) and 6 mm (0.25 inch). The mat thickness is controlled by changing the angle of attack. The angle of attack is controlled manually by the thickness control or the tow points. When you pave with the Auto Grade and Slope Controls, the angle of attack is controlled by the tow point controls. The angle of attack should return normally after the change in thickness is complete.
Illustration 2 g00574673
Screed reaction timeTo obtain the smoothest surface, the thickness controls should not be changed once the correct mat depth is reached. If you adjust the angle of attack, the reaction time will be approximately five lengths of the tow arm. If you adjust the angle of attack without allowing time for the paver to react, the mat will be irregular.