EATON, the world’s leading manufacturer of hydraulic components, recently introduced a multi-port valve CMA based on load port independent control technology. CMA’s most prominent feature is the use of a dual spool design, the actuator can be independent of the inlet and outlet control, thus solving the spool  drilling milling machine coupling problem. Greatly increasing the flexibility of control. At the same time CMA embedded P / T / A / B four port pressure sensor and T port temperature sensor, and the main spool using LVDT closed-loop control. This allows flow control to be compensated based on real-time feedback pressure and metal cutting fluid temperature. Pressure compensation and temperature compensation based on electrical feedback are realized, which makes the control precision higher.

hole punching machine

hole punching machine

The pilot stage uses the voice coil motor as the electro-mechanical converter, greatly improving the frequency response while also reducing the pilot level of control current. Between the small control current on the same multi-channel valve far-reaching. In the flow distribution (anti-flow saturation). There are three traffic allocation options available for configuration, and can be configured by software. Compared to the mechanical way of pressure compensation and flow distribution of the multi-valve, CMA all the control based on Drilling Machine for steel structure electrical feedback, and add more advanced algorithms, CMA more flexible, accurate, efficient and rapid. The entire valve through the CAN bus to communicate with other system components, and a mature control algorithm and configuration software to control the CMA. It can be said is the hydraulic control CMA is the hydraulic control technology is another innovation.