The November 2017 edition of AsphaltPro includes a focus on controls. While that typically brings plant operations to mind, let’s consider the controls and automation available to the contractor in the field. Specifically, look at the controls designed to improve the quality and precision of grading, milling, paving, slope, compaction and so on.
Original Equipment Manufacturers (OEMs) often work together to ensure their machines and controls systems can “talk” to one another. Just one example of this is how the Roadtec and Carlson family of paving products communicate with the MOBA family of automation and controls (visit http://moba-automation.com/machine-applications/asphalt-pavers/ for full descriptions).
OEMs also work to let multiple machines across a large construction project “talk” to one another and to the headquarters office. Just one example of this is the CAT Connect software that is designed to connect the entire worksite (visit http://www.cat.com/en_US/by-industry/construction/cat-connect.html for full descriptions).
Tools such as these are designed to make life easier for the general contractor and the workers in the field. And tools such as these are seeing updates to increase their value for workers. Just one example is the Global Navigation Satellite System (GNSS) from Leica Geosystems of Heerbrugg, Switzerland.
The GS18 T from Leica Geosystems is hailed as the world’s fastest GNSS Real Time Kinematic (RTK) rover, and as of late September, it’s the first calibration-free tilt-compensating GNSS solution immune to magnetic disturbances, according to the manufacturer. The worker in the field no longer has to hold the pole in a perfect vertical position to level the bubble for surveying purposes. The OEM states that it’s the only GNSS RTK rover to use precise enough inertial measuring units (IMUs) instead of a compass, to allow the user to measure with a tilted pole close to buildings, under cars and close to metallic objects. (Visit here for a full description.)
This month’s product gallery looks at the iron and tech you need in the field for paving and pavement preservation. We’ll return to the plant and production in next month’s product gallery.
Atlas Copco Construction Equipment North America has introduced a completely redesigned range of eight QAS mobile generators. Covering power ratings from 25 to 330 kVA, the lineup offers the latest Tier 4 Final engines and footprints up to 20 percent smaller than the previous generation. QAS generators are equipped with an Isuzu, John Deere or MTU T4F diesel engine. Each is available in either a skid-mount configuration or an integrated trailer coupled to its compact design. Depending on the model, the generators can reach up to 40 hours of runtime per tank of fuel, with an external one-click fill mechanism for both fuel and DEF. An ergonomic power terminal board enables operators to connect power cables without bending down. All QAS generators feature a standard external emergency stop button. Each requires less than two hours of service for every 500 hours of operation.
For more information, visit atlascopco.com.
BOMAG Americas, Ridgeway, South Carolina, has released the BW 138 AD-5 tandem vibratory roller with a 54.3-inch rolling width for granular soil and asphalt compaction. When equipped with the intuitive Economizer compaction measurement system, the BW 138 AD-5 alerts operators to compaction progress of the soil or asphalt material, reducing passes and saving time and money. Economizer requires no calibration to deliver real-time compaction progress, and as the degree of compaction increases, the more LED lights on the Economizer light strip illuminate to indicate when optimum compaction is achieved. The system also warns operators of potential over-compaction to prevent aggregate fracturing as well as allowing for the identification of “soft” spots in the material.
Drum diameter is 35.4 inches. Dual vibration frequencies of 3,000 and 3,360 vpm offer rolling speeds up to 3.8 mph. Amplitude is 0.020 inch and average linear load is 86.6 pounds per inch. Front-only, rear-only or front-and-rear vibration mode operation are available.
The BW 138 AD-5 features maintenance free bearings. A pressurized water spray system with 5-step interval timer increases operating time between refills of the roller’s 81.9-gallon tank. Dual water filtration at the inlet helps to prevent spray nozzle plugging, and the quick-attach nozzle design helps to facilitate servicing. Protected to help prevent wind deflection, the five spray nozzles provide uniform coverage across the drum’s width to prevent material pick-up. Self-explanatory control panel dials offer intuitive machine control. It’s powered by a 45.1-hp, water-cooled diesel engine meeting Tier 4 Final emission standards.
For more information, contact Tim Hoover at (660) 580-0350 or email@example.com.
CASE Construction Equipment
CASE Construction Equipment of Racine, Wisconsin, has introduced two double drum asphalt rollers—the DV209D and DV210D. The new vibratory asphalt rollers offer a balanced drum design and a variety of standard features, including automatic vibration control, crab steering, an oscillating articulated roller joint and a pressurized, triple-filtration water system. An available high-frequency option allows for frequencies up to 4,020 vpm. A combination option is also available for both models, featuring a vibratory front roller and rear pneumatic tires.
With operating weights of 21,080 and 22,930 pounds, respectively, the DV209D and DV210D are designed for municipal roads, parking lots and residential developments, as well as more large-scale paving applications such as highways, airports and industrial areas. The new models feature a Tier 4 Final 100 HP Deutz engine.
An articulated roller joint oscillates + /- 6 degrees to maintain reliable drum-to-ground contact, and a standard crab steer design hydraulically offsets the rear drum up to 6.7 inches.
For more information, visit CaseCE.com.
Caterpillar Inc. has announced the availability of the PM820, PM822 and PM825 cold planers, which are half-lane milling machines. All three have a cutting depth up to 13 inches and are powered by a Cat® C18 ACERT™ engine, which is a turbocharged, 6-cylinder, T4F diesel engine providing 755 horsepower. The engine is iso-mounted to reduce vibration and increase operator comfort.
Here are some quick specs on the newest cold planers from CAT:Machine Operating Weight Cutting/Rotor WidthPM820 79,630 pounds 79 inchesPM822 80,887 pounds 88 inchesPM825 82,650 pounds 98.6 inches
The PM820, PM822 and PM825 use a four-post design. The leg posts feature an auto-leveling function to provide smooth height adjustment without stepping. The machines are fully hydrostatically driven by two variable displacement propel pumps supplying oil to variable displacement motors on each track. Drive motors are piston-type and automatically control displacement to provide maximum torque for work or greater speed for moving around the job site. A propel lever/steering joystick provides infinite control of the travel speed within the range. There are several automated functions to simplify operation.
Track tension automatically adjusts to ensure optimum operation. Track assemblies are 70.4 inches long, 12 inches wide and feature replaceable, bolt on polyurethane track pads. Four-mode steering is standard. An electronic control module processes inputs from the sensors on the front and rear tracks along with input from the steering selector controls. It provides simultaneous track movement in the crab and coordinated steering modes and automatically realigns the rear tracks to center when the front-tracks-only steering mode is selected. In the coordinated mode, the inside turning radius is a tight 6 feet, 5 inches.
The cutting chamber features a design that streamlines material flow, reduces wear on the chamber, and has enhanced flush cutting capability, according to the manufacturer. Side plates move via independent hydraulic cylinders that are equipped with position sensors. The rotor drive system features a dry clutch driving a planetary gear reducer. The clutch is coupled to the engine and is hydraulically actuated by the keypad controls on the operator’s console.
Three cutting speeds are available to match the best rotor rpm and torque with the job site conditions, and are controlled electronically from the keypad on the operator’s control console. Automatic Load Control is a standard feature. An ECM continually evaluates engine rpm and controls propel speed. Two six-rib, high-tensile-strength belts drive the rotor through a drum drive gear reducer.
The rotor is equipped with durable three-piece, quick release tool holders and carbide-tipped cutting bits arranged in a chevron pattern. Other rotor systems are available as an option.
The quick release conical tool holders feature a tapered fit. The mandrel features large, replaceable, carbide-faced loading paddles.
The collecting conveyor is driven by a high-torque hydraulic motor. A large chamber discharge opening clears out the cutter box quickly, according to the manufacturer. The seamless collector belt features 1.25-inch high cleats and is 33.5 inches wide. The hydraulically controlled front loading conveyor features height adjustment for raise and lower, and two cylinders for a 60-degree swing to the left and right of center that can be controlled from the operator’s station or at two ground level control stations. It is equipped with upper aluminum covers for added protection against material spills and blowing of fine materials. The loading conveyor can also be hydraulically folded downwards, reducing machine dimensions during transportation.
A standard water spray system lubricates the conveyor belt and helps control dust. A centrifugal pump supplies water to spray nozzles in the cutting chamber. The nozzles focus water spray in a flat fan pattern to the rotor. Nozzles are easily removed for inspection and replacement without tools, according to the manufacturer. The system features an automatic function that operates only when the rotor is engaged and machine is moving forward, which conserves water. The system is triple filtered, and includes a gauge to monitor water pressure, a low water level indicator and water control valves to conserve water use. An onboard winterization system is also included, providing a simple method to purge waterlines with pressurized air. The 898-gallon water tank can be filled from standard wide fill openings on the top of the machine or the standard ground level port at the rear of the machine. There is also an optional side fill port. This enables adding water while the machine is operating.
The operator’s station features dual operating controls, including joystick steering/propel lever, upper conveyor controls and rear track steering controls. Ergonomic instrumentation layout has been designed for comfort and ease of use. A touchscreen display is visible in day or night conditions, and keypads are backlit for comfortable low light operation. The PM820, PM822 and PM825 can be equipped with integrated Cat Grade Control.
For more information, contact your local CAT dealer.
The new DV+ 70i from Hamm is a 7.7-ton tandem roller introduced in March 2017; the DV+ 90i tandem roller is a 9.9-ton being released in January 2018. Both are available in three versions: as a double vibration roller (VV), as an oscillation roller (VO) with vibration drum at front and oscillation drum at rear, and as a combi roller (VT) with vibratory drum front and pneumatic tires at rear. All vibration drums are split. In addition, the rollers can be equipped with the HCQ Navigator intelligent compaction (IC) measurement and documentation system and many other extras. The engine is positioned in the center of the machine and the two-part water tank distributes weight evenly.
Tanks are linked together via communicating pipework; they are filled simultaneously. The Easy Drive operating concept is used across the Hamm compaction line. A steering wheel is used for steering; all other important functions are operated via a joystick and multi-function armrest. All DV+ models are equipped with state-of-the-art engines, according to the manufacturer. This enables the DV+ 70i with its 75-hp engine to satisfy the requirements of Tier 4/Stage IIIB emissions requirements. The new automatic engine stop system can also be incorporated as an optional extra; it switches the engine off during extended periods of inactivity.
For more information, contact Brodie Hutchins at (615) 501-0600 or Brodie.firstname.lastname@example.org
As of September, the John Deere 950K PAT Crawler Dozer is officially available at dealers across North America. The production-class crawler dozer is designed and manufactured by John Deere in Dubuque, Iowa. The 950K PAT incorporates an EPA Final Tier 4/EU Stage IV John Deere 9.0L engine with 280 horsepower. The hydrostatic powertrain is designed to provide approximately 15 percent more power to the ground than a conventional torque-converter powertrain. The PAT blade is 8.6 cubic yards and gives operators the flexibility to place material where they want it on every pass using the blade angle feature, according to the manufacturer.
Equipped with standard electrohydraulic (EH) controls, the 950K PAT is grade-control ready, making it easy to add a grade-control system. John Deere’s “open-architecture” design lets customers employ their favorite brand of grade-control system—Topcon, Trimble or Leica.The 950K PAT features Eco mode, which is designed to optimize fuel economy while maintaining ground speed by automatically adjusting engine speed and transmission settings based on load. This has the potential to reduce fuel consumption up to 20 percent.
Fleet managers looking to get the most out of their 950K PAT can rely on their John Deere dealers to provide Ultimate Uptime, featuring John Deere WorkSight™. With Ultimate Uptime, owners receive predelivery and follow-up inspections that include five years of JDLink™ telematics, machine health prognostics, remote diagnostics, programming capabilities and the ability to add dealer-provided uptime solutions to a customized package.
If you’re looking for bucket options in the work zone, your skid steer has 30 new ones from John Deere of Moline, Illinois. The OEM debuted its enhanced production series buckets for the 744K-II, 824K-II and 844K-III wheel loader models in May. The buckets offer new features, including an improved bucket profile and an optional wear plating. The enhanced production series buckets also feature bushed static bucket pin joints, which is a popular feature on the current 844K and 944K wheel loaders, according to the manufacturer. These pin joints reduce the need for welding and align boring for repair, enable repair in the field and reduce maintenance time overall.
For more information, visit www.JohnDeere.com.
In the second quarter of 2017, LeeBoy of Lincolnton, North Carolina, launched its 6150 wheeled asphalt paver. With variable paving widths up to 15 feet, it is built for the heavy-commercial paving market with an “ultra-efficient” material management system, and these features:
- 74-hp Kubota T4F engine
- High or low deck configuration
- Paving speeds up to 2.6 mph; travel speed up to 7.5 mph
- 7-ton capacity material hopper
- Legend screed system
For more information, contact your local LeeBoy dealer.
The updates to the Leica GS18 T and the latest versions of Leica Captivate field software and Leica Infinity office software, introduced late September, expand the Leica Captivate experience.
“In my business, speed is the name of the game,” said Manny Sangha, owner of Sangha Geomatics & Land Survey Inc., Vanderhoof, Canada. “With my GS16, I’ve been able to reduce time spent on every project. I can only see this getting faster and improving efficiency with the GS18. No longer having to level the pole nor calibrate the system, this is a real value for me and a game-changer in the industry.” As the world’s fastest GNSS RTK rover, the GS18 T is the first calibration-free tilt compensating GNSS solution immune to magnetic disturbances, according to the manufacturer. GNSS measurements can be taken from any position on site, saving users up to 20 percent of time in the field over conventional surveying practices as you no longer need to hold the pole vertical to level the bubble, estimates the manufacturer. As the only GNSS RTK rover to use precise enough inertial measuring units (IMUs) and not a compass, users can measure with a tilted pole close to buildings, underneath cars and close to metallic objects, according to the manufacturer.
With integrated quality assurance, the GS18 T records exactly how the pole was levelled during the measurement. The GS18 T then stores the values, ensuring measurement traceability and complete quality reporting.Fully supporting the GS18 T, Leica Captivate v3.0 field software and Leica Infinity v2.4 office software now offer users a more immersive means of control on site and at the desk. Captivate now allows configuration of the GS18 T for all measuring and staking applications and the visualization of tilt compensated measurements. Measured data can be directly imported into Infinity or exported into a variety of formats suitable for CAD packages. Within Infinity, users can visualize the measured data, including the creation of reports providing full traceability and quality assurance for themselves and their clients.
For more information, visit http://leica-geosystems.com/gs18t.
Neal Manufacturing, a division of Blastcrete Equipment Company, Anniston, Alabama, has launched its new Generation IV pumps, which are designed to enhance spraybars and require less frequent maintenance than their predecessor. The Generation IV pumps include robotically welded pump housings and industrial-grade hydraulic cylinders. They come with Neal’s new filtration system. The system’s compact filters weigh 98 percent less than previous filters when full, eliminating the need for a crane during filter changes, according to the manufacturer. Neal installs the system with dual spraybars; each spraybar is synchronized with one 100-gpm Generation IV pump. The pumps and spraybars work together to provide optimal efficiency on road pavement maintenance projects. Neal offers free training seminars at its Anniston location.
For more information, contact email@example.com.
The SX-8e/ex is the largest in the Roadtec line of soil stabilizer-reclaimer machines. With an operating weight of 82,000 pounds, the SX-8 is designed to cut up to 20 inches deep and 100 inches wide for road rehabilitation, cold recycling or soil stabilization. The machine’s weight is evenly distributed between the two axles.
The SX-8e features a Tier 4i Caterpillar C18 75- hp at 1,900 rpm engine, while the SX-8ex is equipped with a Tier 3 Caterpillar C18 700-hp at 1,900 rpm, which is intended for lesser regulated countries. The engine provides power to the rotor through a direct drum drive.The SX-8 rotor is designed for milling and mixing the most resistant soils. A variable geometry cutter housing design positions the cutter in a way that promotes material sizing as well as the flow of the material. Heavy-duty front and rear doors are hydraulically adjustable for additional control of gradation and flow.
An air-shift 4-speed transmission is designed to allow the change of cutter speeds without a loss in production. The operator can select the appropriate cutter speed for the current conditions without making modifications to the cutter drive.
The SX-8 cooling system pulls air from the top of the machine before it is exhausted through the radiator package. This design is intended to reduce the amount of dust traveling though the cooling system. Clean-out panels provide access for radiator maintenance. The SX-8 was designed with operator comfort and visibility in mind. The ergonomic design of the sealed cabin situates the operator in position to reach all controls and systems. Joystick controls and four different steering modes supports the machine’s maneuverability and operation. The operator seat slides laterally and swings 90 degrees to help provide the operator’s preferred vantage point from which to work. The operator platform also slides 18 inches past the right of the machine for additional visibility.
The stabilizer-reclaimer’s hydraulically-controlled suspension allows the depth of cut to be selected via push button. The machine is built on a rigid, sealed box frame designed to allow a controlled airflow while maintaining its durability. The SX-8 frame is built at Roadtec from strong A656 grade 80 steel, which is said to offer twice the yield strength of mild steel.The custom-made machine frame is designed to perform in all terrains by providing substantial ground clearance. The wheels are suspended by four independently-controlled hydraulically adjustable leg assemblies that are bolted to the mainframe.
For more information, contact Eric Baker at (423) 265-0600 or firstname.lastname@example.org.
The latest double drum models from Volvo Construction Equipment—the DD30B and DD35B—round out the company’s full line of asphalt compactors. They provide up to 10 degrees of oscillation and 30 degrees of frame articulation in each direction, and offer the fully integrated TwinLock™ traction control and torque transfer system for climbing steep inclines by minimizing drum slippage.
“The DD30B and DD35B would be great additions to the fleet of any small contractor who does a mix of residential and light commercial paving work,” Bill Laing, product manager at Volvo Construction Equipment, said. “Their uncompromising power and fuel efficiency coupled with a range of productivity enhancing features make these the best compactors we’ve been able to offer in this size class to date.”
Powered by a Tier 4 Final 49.6-hp engine, the DD30B and DD35B produce high torque at low RPM. Fuel efficiency is further enhanced with the optional auto-idle feature, which reduces engine speed when controls are inactive for five seconds, helping to reduce operating costs. Passive engine regeneration requires no daily input from the operator to increase machine uptime.With the auto-vibration feature, vibration is automatically engaged when the machine is moved out of neutral and shut off when returned to neutral. To optimize finished pavement quality, each drum’s edges are chamfered and rounded to avoid marking the mat while rolling.
The DD30B and DD35B also feature the automatic variable interval water spraying system, which provides uniform drum coverage and variable flow to prevent material pickup.In addition to the range of automatic features, the Volvo DD30B and DD35B include design elements to increase operator comfort and control. The pillar-less forward view and sloping engine hood are designed to offer all-around visibility of the jobsite, as well as unobstructed sightlines down to the drum and spray bars. Visibility can be further improved by sliding the operator seat to the desired location. The ergonomic controls help the operator keep an eye on the road and avoid fatigue. Because the controls are configured in the same layout as larger double drum Volvo models, operators can intuitively control the DD30B and DD35B machines.
For added convenience, the optional foldable ROPS canopy can be easily collapsed without the need for special tools, helping crewmembers easily transport the machine from site to site.The latest double drum compactors are designed to increase machine uptime. The hinged hood allows for ground-level access to the engine and hydraulic components, enabling easy maintenance. Passive regeneration requires no daily input, and parked service regeneration is only required at 500-hour intervals. The 79-gallon water tank’s low positioning gives the machine a low center of gravity for stability and can be refilled from ground level.
- Operating weight of DD30B = 6,839 pounds
- Operating weight of DD35B = 8,185 pounds
- Centrifugal force (both) = 7,500 pounds
- Vibe frequency (both) = 4,000 vpm
- Rated engine power (both) = 49.6 hp• Drum width of DD30B = 49.2 inches
- Drum width of DD35B = 54.1 inches
For more information, visit volvoce.com/na.
In its brand new compact class, Wirtgen combines the advantages of small milling machines with the front-loader principle and productivity of large milling machines. No less than four models are available to customers in the compact class, with standard working widths between 3 feet, 3 inches and 4 feet, 11 inches and depths up to 13 inches. Combined with the Flexible Cutter System (FCS), working widths from 3 inches to 4 feet, 11 inches are possible, according to the manufacturer. The compact line includes the W 100 CFi, W 120 CFi, W 130 CFi and W 150 CFi. Fields of application range from classic small milling machine operations, such as partial road repairs, all the way to the removal of entire roadways.
Like the new generation of small milling machines, Wirtgen also has equipped its compact class with added automated functions.The side plate now has an active floating position, meaning it is lifted at specific intervals to keep it from sinking into the surface when the machine is at work on loose material, such as gravel.
The scraper on the rear rotor plate also has new features, such as a sensor that prevents it from catching on any edges; the scraper is raised automatically in the process. An ultrasonic sensor determines the distance between the scraper and the milled material during partial transfer, in order to regulate how wide the scraper ideally should be opened. In this way, the material is optimally deposited behind the milling drum unit, increasing output and simultaneously reducing wear on the unit, the drum itself and the cutting tools.
The modern control technology in Wirtgen’s compact milling machines also displays its advantages in terms of steering. In the 3 foot, 3 inch milling machine W 100 CFi, for instance, the right rear support wheel can be folded in automatically, without lowering the milling drum or manually loosening a bolt. In addition to the “basic position,” the right rear crawler track also has the new positions of “outside” and “folded in.” In the “outside” position, the crawler track is located within the cutting diameter of the drum, enabling the machine to be positioned along the right-hand milled cut. In addition to the steering wheel, the operator also has access to a sensitive, fingertip steering function in the multifunctional armrest.
The conveyor features a wide slewing angle of 60 degrees in each direction.For high-precision material transfer, the machine operator can move the conveyor at two different speeds. With advanced control technology, the conveyor speed is held constant even if engine speed fluctuates.
Looking at the W 150 CFi specifically—this front-loader features 400 horsepower. For maximum traction of the crawler tracks, Wirtgen has adopted the central cutting drum design from its large milling machines. This model also has an Intelligent Speed Control (ISC) traction control system, which makes sure on demanding milling jobs that all four crawler tracks run at constant speed and high traction to achieve maximum milling performance. With an operating weight of 45,856 pounds, the W 150 CFi can be transported without a special heavy transport permit in most cases.
For more information, contact Brodie Hutchins at (615) 501-0600 or Brodie.email@example.com.