Mini-Line G198 operating manual
Page 2
Mini Line
®
G198 Grade Control & Accessories
Product description
The purpose of the Mini-Line
®
G198 ‘Stand-Alone’ system is to automatically control the elevation
of the paving screed to give a smoother asphalt mat finish.
Operating Mechanical system Principle
The mechanical unit of the system consists of the Sensing Arm, Shoe and Counter-balance.
Depending on the working environment, at times the Tube Assy is used instead of the Shoe. The
mechanical unit detects every single alteration that occurs vertically i.e. any changes in the tow-
point elevation and converts the linear displacement into rotational motion.
Electronic System
The electronic system has 3 main features
1
Sensor circuitry
2
Microprocessor unit
3
Power driver circuit
Any linear displacement is accurately and quickly transformed into digital signal, and after being
analyzed and compared with the reference point, information in forms of pulses are send to the
electro-hydraulic valve in order to regulate the cylinder and consequently the tow-point. Thus the
angle of attack of the screed is increased or decreased according to particular conditions.
Fig 1 Product overview
Mini Line
®
G198
(P/N S-50138)
(S/N see label)
Coiled Cable
(P/N S-50101/4,0)
Counter-balance
(P/N S-50105)
Sensing Arm
(P/N S-50104)
Shoe
(P/N S-50103)
Tube Assy
(P/N S-50106)
Product overview
The Mini Line
®
G198 electronics is embedded in a single aluminium alloy unit which protects the
electronic safely against external harsh environmental conditions such as vibration, shock, heat,
water and constant physical contacts. The aluminium alloy ‘house’ is almost cylindrical in shape with
