Positive control adds functionality and saves energy.
The Rexroth M9 control block has all the consumer connections on the front of the unit which makes pipework considerably easier.
The Rexroth M9 control block has all the consumer connections on the front of the unit
The M9-25 control block with positive control ensures a high level of efficiency, functionality, and low energy consumption. Rexroth has developed these multicircuit open centre systems to create the positive control technology for excavators in the power category 20 to 32 tons.
The compact design of the monoblock and the use of positive control technology result in energy conservation during operation of standard excavators of class over 20 tons. The pipework required by excavator manufacturers is also reduced considerably. When compared to negative control technology, the M9 control enables faster response dynamics, greater stability, improved functionality, and better control.
Simultaneous movements are often carried out during excavator operation. The circuitry used in the M9-25 allows each of the main actuators to be supplied by a separate pump. Dividing the pump circuits makes it possible to operate different actuators with different pressures quickly and while also saving energy even if movements overlap. Combining the pump circuits, on the other hand, ensures that maximum speeds can be achieved with the excavator. The new positive control technology also features minimised loss associated with flow circulation in the neutral position and the added advantage that control loss does not occur when the pump comes on stoke.
The M9 is designed as a compact monoblock which enables simple and inexpensive plumbing with low delta-p-values even when installation space is limited. All consumer connections for the jib, strut, shovel, slewing gear and suspension are at the front. An additional function that can be used to connect a hydraulic hammer for example, is already integrated in the control block and is available to users as standard. Pump, tank and cooler connections are located on the back of the block.
Manufacturers can expand the positive control system and the M9 control block according to market requirements. Electronic RC controls and the BODAS modular system from Rexroth can be used to design an extensive pump and valve management system using either control pressure sensors or the electric proportional pressure reduction valves that can be integrated in the M9. This allows the gradual introduction of fully electro-hydraulic excavator control without requiring major design changes.
Next-generation motor management solution Schneider Electric South Africa
News & events Other technologies
Schneider Electric has launched its TeSys Tera motor management solution in the West African market, combining advanced motor protection, digital connectivity and real-time diagnostics for manufacturing, mining and water applications.
Read more...From concept to execution, unlocking renewable energy
Other technologies
Businesses already understand the benefits of renewable energy, however, as renewable energy solutions become more sophisticated, successful implementation requires a structured decision-making process that aligns technology choices with business objectives.
Read more...Smarter, more secure electricity networks
Other technologies
As South Africa accelerates the rollout of smart prepaid electricity metering, innovative enclosure technology from PPS is helping utilities improve network security, reduce electricity theft and protect critical electrical infrastructure.
Read more...Siemens launches SIMATIC AX WinCC Unified Elements
Pneumatic systems & components Other technologies
New engineering tool speeds automation application development, reducing the time required to bring industrial projects to market and empowering automation engineers to build, manage version control, and deploy visualisation engineering projects
Read more...Decoupling software from hardware for future-proofed process automation Schneider Electric South Africa
Other technologies
Legacy systems continue to perform admirably; the dilemma is that systems like PLCs, DCS (distributed control systems), SCADA and field devices were designed for deterministic, long-term operations.
Read more...Duplex worm gears for precision backlash adjustment
Other technologies
KHK USA has introduced duplex worm gears that allow precise backlash adjustment through simple axial movement of the worm shaft, eliminating the need for gearbox housing alterations during assembly or maintenance.
Read more...Corrosion solution for engine hot testing
Other technologies
Engine internals are at risk for corrosion from water used during hot engine testing and fill and flush activities. Corrosion affects the engine’s like-new appearance and threatens its integrity.
Read more...Hygienic ultrasonic flow sensor ifm - South Africa
Other technologies
The SU Puresonic Hygienic ultrasonic sensor from ifm detects flows of conductive and non-conductive media with high precision.
Read more...Fault analysis for lifting equipment
Other technologies
Ensuring the sustained performance of capital equipment such as crane rails, ropes, hoist rails, gantry rails, and runway beams, which guide lifting equipment and support heavy loads, is essential for safety, reliability, and efficient operation.
Read more...Bringing true mobile welding capability to SA agriculture
Other technologies
Bolt and Engineering Distributors has launched the new Fronius Ignis Battery. This is a next-generation, battery-powered welding system engineered for mobility, reliability and performance in off-grid agricultural environments.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version