The new generation of Wirtgen large milling machines
With the W 200 and W 210, Wirtgen launches two truly efficient models in the large milling machine range. They broaden the unique portfolio offered by the market leader to a total of 17 cold milling machines. With its entirely new design, this generation of large milling machines offers something very special: the machines incorporate many innovative features in terms of milling performance and milling job, enabling them to be adjusted to the required application with greater flexibility than ever before. For the machine user, this concept results in tremendous cost savings and thus a very favourable total operating cost balance.
Three milling widths, variable tool spacings, low weight
Both large milling machines are available with a standard milling width of 2 metres, but can optionally be fitted with a 1.5-m or even 2.2-m wide milling drum. The tried and tested FCS Light quick-change system for milling drums enables the machines to carry out a wide variety of different milling jobs as various milling drums can be used. Both machines feature a maximum milling depth of 33 cm.
The large milling machines can be used for extensive surface course rehabilitation, the selective removal of pavement layers, and fine milling jobs using drums with different tool spacings. As a high-performance milling machine, the W 210 is equipped with a particularly strong engine offering an output of 500 kW / 671 hp. Its relatively low operating weight of 28,100 daN (kg) ensures ease of transport. The W 200 is equipped with a 410 kW / 550 hp engine. Its weight of 27,100 daN (kg) makes transport just as easy, and enables the very compact large milling machine to work with maximum efficiency – whatever the milling job.
Dual-engine design of W 210 significantly reduces fuel consumption
The W 210 drive design presented by Wirtgen GmbH is an innovation unprecedented in cold milling machine technology. The use of two diesel engines results in the unique advantage of the operator being able to utilize the engine power selectively depending on the specific job requirements. Machine users will thus benefit significantly from a fuel cost reduction by up to 25% compared to conventional drive technology. For situations on the construction site are often the following: on a particular day, the large milling machine requires the maximum possible engine power as it needs to work at a milling depth of 30 cm; on the next job, however, high area performance at a low milling depth of only 4 cm is called for. The total power of 671 hp provided by the two engines is unleashed for the large milling depth whereas the operation of one engine is sufficient when working at a depth of only 4 cm. The second engine can be switched on and off as required. If the second engine is added on, it automatically runs in the speed range of the first engine.
This drive design is also truly environmentally friendly. Using only one engine in less demanding conditions will result in correspondingly lower exhaust and noise emissions, which protects both the machine operator and the environment.
Broad range of applications, perfectly adjusted milling drum speeds
The W 200 and W 210 large milling machines offer additional adjustment features to further optimize diesel fuel consumption, milling performance and overall efficiency in accordance with the job at hand. The operator may select three engine speeds: 1,600 min-1, 1,800 min-1 or 2,050 min-1. The lowest engine speed is selected to work at maximum power while keeping tool wear and fuel consumption to a minimum. The 1,800 min-1 speed ensures optimal area performance and a smooth surface texture in surface course milling applications. The speed of 2,050 min-1 should be selected for fine milling applications in order to achieve the highest possible advance rate. In these jobs, the machine can easily work at speeds exceeding 30 m/min while guaranteeing a high-quality texture of the milled surface nonetheless.
Operator’s platform sets unprecedented ergonomic standards
The operator’s platform including controls is an entirely new development and impresses with adjustment options perfectly tailored to the operator’s everyday needs. The height-adjustable seat can be moved beyond the zero-clearance side on a swivel arm. The slender “wasp waist” design on both sides opens up completely new horizons in terms of milling edge and crawler track visibility. It enables the operator to work in an ergonomic posture and enjoy a perfect view of the milling operation also when comfortably seated. The operator can move the identical main control panels fitted left and right on the operator’s platform to a level and position perfectly suited to his body height. The number of switches on the control panels has been reduced to a minimum, and their features are labelled in a language-neutral manner, enabling the operator to handle the machine skilfully and with great ease. Features belonging in the same category have been grouped together in a practical way and colour-coded in a clear and unambiguous fashion. The useful colour codes permit intuitive operation and shorten the period needed to train new operators. The control panel of the Wirtgen Level Pro levelling system and the new multi-functional control screen have been installed in a central, clearly visible position on the platform. These panels can also be moved to the right or left so that the operator never loses sight of their features.
The W 200 and W 210 machines increase operator comfort even further by featuring a fully anti-vibration mounted operator’s platform that significantly reduces the degree of vibration occurring on the platform. A new canopy design enables the operator to move the canopy to both sides complete with front and rear screens in order to safely negotiate any trees or traffic signs.
Automatic machine alignment using PTS
The new PTS system automatically aligns the large milling machines parallel to the road surface. PTS is short for Parallel To Surface. The system ensures simple, accurate operation of the machine in high-quality milling jobs. PTS also assists the operator with positioning the machine in the milled cut to initiate the milling process. In automatic mode, the system takes care of all the steps that the operator would otherwise need to select manually one after another. The need for tiresome manual correction is eliminated. The operator activates the Level Pro system at the flick of a switch, and all four crawler track units of the large milling machine are lowered simultaneously at high speed. When the milling drum assembly reaches the surface to be milled, the lowering speed is reduced, and the milling drum slowly penetrates the material down to the set depth. The automatic process contributes to preventing excessive cutting tool wear or even failure when commencing the milling operation.
The same applies to the alignment of the large milling machines transverse to the direction of travel. In many cases, the machines need to overcome significant differences in height when being moved into or out of the milled cut. The integrated 4-fold full-floating axle balances out all four track units quickly and reliably to reduce the machine’s lateral inclination to a minimum. This lends a high degree of stability to the large milling machine whilst the operator enjoys a pleasant driving experience.
Intelligent travel drive control ensures perfect traction
The ISC system, which is short for Intelligent Speed Control, plays its aces in particular in highly demanding milling jobs. Just like the traction control system of a car, ISC prevents crawler track slip and ensures perfect traction of all track units to achieve maximum milling performance. This, in turn, reduces track pad wear. When driving through bends, the ISC system automatically increases the speed of the outer crawler tracks depending on the steering angle. As a result, even extremely narrow bends can be milled using the all-track drive. Automatic adjustment of the advance rate to the diesel engine load always ensures maximum performance, yet quiet operation of the machine.