The HX series, the new flagship series in Hamm’s asphalt construction fleet, is designed for high-quality compaction.
The 7-tonne, 15,432-pound HX 70i model and 9-tonne, 19,842-pound HX 90i model achieve high surface outputs on large construction sites.
A high level of precision is possible due to pivot steering, which provides an extremely large turning angle, a very large track offset and has four steering modes.
Split drums and automatic reversing
The well-conceived compaction technology with split vibration and oscillation drums actively prevents cracks and bulges from forming in the asphalt.
The automatic reversing brakes and accelerates the rollers quickly, but smoothly.
Also, an electrically-adjustable seat turns automatically in the direction of travel when reversing.
Smart Compact: The intelligent compaction assistant
On request, Hamm equips the rollers in the HX series with Smart Compact, the new automatic compaction assistant. It actively supports the driver and is easy to operate.
According to the company, Smart Compact may be of great interest to the current generation of drivers and, in particular, to those just starting their careers.
This compaction assistant combines simple operation with handling via smartphones, computers and other digitally controlled devices. Therefore, it meets the changed personnel requirements at modern workstations in road construction.
The automatic mechanism sets compaction parameters for each drum. So, the driver only has to enter whether a base, binder or asphalt surface course is to be compacted.
Smart Compact automatically decides between compacting statically or with oscillation and determines appropriate vibration amplitude.
To this end, it evaluates physical properties of the asphalt, such as the temperature or rigidity. New features include the integration of local weather data via an integrated weather station, and the assessment of the complex cooling behavior in the area of tension between the asphalt and air temperature, as well as the wind. Based on all of this information, the system determines the right setting separately for both drums.
According to Hamm, it is the first manufacturer in the world to automate the separate settings of the individual drums.
Smart Compact detects when an asphalt layer is almost completely compacted. The system then automatically cancels the dynamic compaction, and puts the roller into ECO mode. As a result, the engine speed is reduced by up to 20%, which also means that up to 15% fuel can be saved.
Increased process reliability—simplified operation
The bottom line is that Smart Compact increases the process reliability and, in turn, the quality of the compaction and the surfaces. The simplicity of the assistant here is captivating. It is operated via a separate display. The user guidance is clearly designed, meaning that the personnel can fully concentrate on driving the machine.
Clear view, additive mixing and disc spreader
The HX series looks different to its predecessor series, featuring newly designed lights and sheet-metal brackets.
In the cab, the unobstructed view to the rear left has been improved. The new camera system with robust monitors (IP 66), which is integrated as standard, further improves the view into the rear space.
In the future, water and additives will be stored separately in the additive mixing unit. This saves water, and the additive can be dosed with an extremely high level of precision.