Compared with earlier models, the smart actuator CAHB-2xS offers four new or enhanced features in control, accurate position sensors, built-in monitoring/diagnostics, and communication. It also offers a typical MTTF (mean time to failure) of 75 years.*
François Ducourant, Business Development Manager at Ewellix:
“The CAHB-2xS adds smart control functions, sensors and communication to equipment that can operate without human intervention. It’s the first in a family of new products that are part of the Ewellix SmartX digital platform to help customers in their journey towards digitalisation.”
Patented non-contact sensors provide a true absolute position of movement that never require calibration, while motion is constantly monitored with the option of synchronising multiple actuators to offer parallel motion even at full speed.
In addition, the CAHB-2xS monitors its own condition by transmitting via bus connection an error code if it operates outside specifications and offering functional safety like Safe Torque Off with Safety Integrity Level 2 (STO SIL 2) and Safe Direction with safety integrity level 1 (SDI SIL1) on request.
Together, these new features deliver several customer benefits, including lower costs, faster time to market, and higher productivity.
In terms of cost saving, the actuator can be connected to a simple switch or the input/output of the electronic control unit without the need for a high-current controller. When the CAN bus is used with a protocol SAE J1939 and CAN open on request, the actuator wiring can also be simplified.
In addition, multiple actuators with parallel motion can be controlled without the need for an extra electronic box or CAN bus on the equipment – further lowering material and development costs.
Machine developers can also design new products – or perform upgrades – more easily and quickly using the new actuator with its plug and play functionality. For example, the firmware can be loaded to the actuator for a quick modification, and the end stop can be adjusted from the equipment.
Additionally, the CAN bus command allows you to specify an exact actuator position that is reached at a defined speed and with a maximum force, while the intelligent firmware eliminates the need for calibration or actuator testing.
Compact and powerful with soft start and stop, the actuator will provide a smooth movement that optimises productivity. In addition, onboard diagnostics help identify any problems early, allowing them to be resolved before they become a serious concern. Minimising unscheduled shutdowns helps reduce maintenance costs.
The actuators have a wide range of potential applications in material handling equipment. One example is an Autonomous Mobile Robot (AMR), which could use four actuators to lift heavy loads in a horizontal plane.
As all Ewellix electromechanical actuators developed for material handling like the CASM-100 that pushes and pulls 50 000N, the actuator CAHB-2xS that pushes and pulls 10 000N, the CAHB-2xS does not require regular overhaul and maintenance, as would be needed in a hydraulic system.
During development, the actuators passed the environmental test plan to satisfy OEM requirements when used in harsh mechanical, electrical, and environmental conditions. Equipped with a ball screw, this arrangement offers high levels of efficiency, reducing energy consumption, allowing energy recovery, and making it ideal for applications such as battery-operated vehicles, where it can help increase the range and reduce recharge times.
*In a safety evaluation (EN ISO 13849), mean time to failure (MTTF) was 75 years for an actuator powered 8 hours per day, 240 days per year. A BLDC motor is available on request to go further.
