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It can also import LandXML (.xml) files, which is an international standard file format that most common engineering software companies use for transferability between office software systems. The design can be transferred to the display by either a thumb drive, or wirelessly over cellular or Wi-Fi signals.Ĭat uses Trimble Business Center – HCE office software to prepare 3D designs/models to be loaded into their systems, Hagemann says. Trimble’s software can also accept files created in several other civil engineering software systems such as Bentley and AutoCAD. Along with the 3D system, Caterpillar includes the AccuGrade Ready Option and the wiring and brackets to add other technologies if your application or jobsite calls for them. The system needs to only be calibrated once at install. As the operator comes closer to grade, the system will lock on the design and drive the blade up and down automatically to stay on grade.
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With Auto Carry turned on, as the blade load increases and the tracks start to slip, the blade will automatically rise to reduce the track slip and continue moving full blade loads. The operator starts moving material by lowering the blade. The Cat Grade with 3D system takes you from first pass to final grade, says Hagemann, and is designed to move the most material the machine can move efficiently. Depending on the machine model and blade type, the system will have up to three in-cylinder position sensors. Here’s how they work:Ĭaterpillar’s Grade with 3D system uses in-cylinder position sensors, which puts the sensor inside of the blade cylinders and out of harm’s way, says Scott Hagemann, Cat market professional. So, we thought it would be useful to compare them, side by side. But what they all have in common is the ability to do GPS dozer operators faster and more efficiently.
You save fuel, track wear and engine and lube oil life by not overloading the machine to get to grade.Įach of these systems (Caterpillar, Deere, Komatsu and Topcon) have different component architecture and functionality. All those concerns vanished with the new mast-free systems.Īside from the physical advantages of the new systems, the mast-less systems dial into sophisticated software in the controllers that help you optimize the cut on each pass.
Finally, there was the possibility of the cables fraying or getting snagged in trees or other jobsite protrusions. Not to mention they were somewhat precarious, since the masts were at risk of snapping off if the dozer was jolted hard enough. Climbing up on the blade to remove the masts is also a safety concern. The cost of these receivers made them attractive to thieves. One immediate benefit all these systems offer is that you no longer must attach to and remove the receivers or masts every day. The IMUs are basically gyroscopes mated to a controller or mini-computer. The new “mast-less” systems use low profile receivers on the top of the cab and various combinations of sensors and inertial measurement units (IMUs) to orient the X-Y-Z position of the blade in space. Long cables – draped from the receivers to the body of the dozer – carried blade positioning information to the controllers in the cab. On previous generations of systems, one or two GPS receivers were bolted somewhat awkwardly on long mast poles attached to the blade. In the past 18 months, however, several major manufacturers have begun integrating these systems into the physical structure of their machines, creating integrated systems that not only improve the grade control performance, but make the process less cumbersome from a hardware perspective. These systems revolutionized the operation of dozers, but there were a lot of parts to track and maintain.
GPS* machine control started out as a tangle of aftermarket products all bolted on and wired up as retrofits to existing dozers.
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