Abstract: The control is mounted on the turntable of a conventional motor grader or similar scraper, in a direction parallel to an axis through the points of attachment to the turntable of the rods of two rams which control the angle of the blade of the scraper to the horizontal. The control is used to hold the blade angle at a first angle when the scraper is moving in one direction and at a second angle when moving in another direction. In the control are two vials mounted side-by-side and adjustable by a motor to be centered at the aforesaid first and second angles. A control box on the cab enables the operator to selectively adjust the electric current of the device to respond to one vial or the other depending on the direction of movement of the scraper. If the blade is off the desired angle, a signal from the vial actuates a hydraulic valve control to energize one or both rams to raise or lower and thus restore the blade to the preselected angle.