Wirtgen's large milling machine proves its worth in everyday construction use
The W 210 is the ideal milling machine, both for large-scale milling operations in San Francisco center's dense traffic and for digging deep trenches
Whenever optimum results are required, e. g. both for large-scale milling operations in San Francisco center's dense traffic and for digging deep trenches to repair gas lines, the Wirtgen is the ideal milling machine
ABSL Construction, a US American general contractor based in the San Francisco Bay Area, has two of Wirtgen's flexible large milling machines in its machine pool.
PTS – Parallel To Surface
The PTS system developed by Wirtgen guarantees that the working depth is maintained with maximum accuracy and makes work as easy as possible for the operator. It also automatically aligns the machine parallel to the road surface in a dynamic process.
The front and rear lifting columns are lowered evenly and in parallel to each other. In addition, the 4-fold full-floating axle that forms part of the PTS system quickly balances out any unevenness on the left or right side, thus governing the automatic alignment of the machine transverse to the direction of travel. PTS additionally comprises a supporting automatic function for commencing the milling operation at the set milling depth.
"Once you finish a cut, you turn off automatic, pushing one button, and the machine just lifts up out of the cut all by itself. It’s one less thing for the operator to think about,” Allende states.
The dual-engine concept is based on the knowledge that engines are exposed to greatly varying performance requirements on each construction site depending on the material to be milled and the milling depths. Building the with two diesel engines efficiently splits the machine's drive power: the first engine has an output of 276 kW/375 HP and the second engine has an output of 224 kW/305 HP. For lower power requirements, such as for transport mode or idling times, only one engine is switched on. The second engine is added on for increased performance requirements, and synchronization of both engines is effected in a digital process.
The Wirtgen LEVEL PRO leveling system ensures maximum evenness. The LEVEL PRO controller is the "brain" of the system. It evaluates the data transmitted by the sensors, controls the machine’s height adjustment and forwards these data to the control panel. In this way, LEVEL PRO guarantees continuously good milling results and eases the machine operator's workload: "We find Wirtgen’s Level Pro system to be easy to use as it regulates the pre-set milling depth electronically."
VCS – Vacuum Cutting System
ABSL Construction has also equipped its machines with the optional Vacuum Cutting System for the extraction of fine material particles. This Vacuum Cutting System for cold milling machines developed by Wirtgen is unique on the market. It sucks the fine material particles that are created during the milling process into the milling machine's short conveyor channel and transports them to the long conveyor through two hoses. A hydraulically driven centrifugal fan installed on the conveyor reinforces this process and creates negative pressure in the milling drum assembly at the same time. Additional water at this point binds most of the particles. The water-bound particles are finally returned into the stream of material and are, for the most part, fed into the truck together with the milled material during the loading process.
Automatic error detection due to on-board electronics and WIDIAG
The proprietary diagnostic system with a clearly structured, multi-functional control screen for monitoring the entire machine displays all operating parameters and maintenance details. The on-board automatic diagnostics system of the machine independently monitors valves, sensors and control components.
When repairing malfunctions, WIDIAG, the service diagnostics system from the Wirtgen Group, acts as an interface between machines and humans, making the diagnostic process significantly easier.
"Climb in and let the milling begin! It takes no more than a short training period to be able to operate the W 210 just as intuitively as a milling pro," says Allende. This comes as no surprise: the operator just has to learn a few operating elements, as the WIDRIVE machine control system performs a number of functions automatically. The efficiently grouped operating elements with language-independent symbols provide for optimum handling. Moreover, the clearly structured color control screen continuously informs the operator of key machine and operating parameters.
Quinto Allende puts the main aspects in a nutshell: "Their user interface is a lot simpler to use as well. In a couple of hours someone with minimal experience can be operating the equipment. It goes to show how intuitive the user interface is to pick up on.”