SRI
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Smart Automation Servo Roller Indexer TECHNICAL CATALOGUE wering your Servo Empo

Table of contents Why? The significance of displacement accuracy Enhancement of motor performance General information Load capacity table - Mounting positions Order designation

Why? The world of servo-driven tables is the connection between electronic and mechanical disciplines. The SRI table allows the machine designer to manage the know-how of the system and maintain full control over it. At the same time, it allows full flexibility of use, thus ensuring the Electronic Operator to perfect the tuning of the machine and enhance its combination of mechanical and electronic features. The high versatility and flexibility of this table helps the increasingly pressing market demands for the reduction of development times and time-to-market. The SRI field of use crosses...

The value of displacement accuracy Generally, the good operation of a mechanical system is a function of controlling key factors such as backlash and elasticity of the system, whilst respecting the assigned movement. The SRI rotary table, with orthogonal axes, was designed and manufactured to allow achieving these goals. The SRI is a constant-velocity rotary table, with no backlash and with high mechanical rigidity. These features can easily be appreciated in terms of system controllability and positioning accuracy, as shown in the charts. Mechatronic application with SRI Advantages: • High...

Enhancement of motor performance OUT One of the priorities for a machine designer is to manufacture a system to be energy efficient and effective, thus minimizing the average demand for plant power. Such an operation, for example, involves the homogenization of the electricity demand for the control of the motor and, therefore, of the application. Considering this, the SRI permits you to increase the motor revolution speed, thus reaching the optimal operation range and allowing the motor / table combination to enhance the mechanical features and ensure maximum efficiency of the system....

Versatility of application The compact and symmetrical design, the possibility to vary at will the law of motion and the large central through-hole make this table suitable for any situation and field of application. This flexibility allows the configuration of a unique machine, permitting any subsequent project change or variation required by the end-user. The high accuracy, the absence of backlash throughout the movement and the high rigidity allow it to work in applications that require high dynamic performance and wide flexibility of movement. The possibility of operating at high speeds...

Operation without backlash Minimized noise of the mechanism Very high operating accuracy Low volume yet high load; minimal design impact when built into the machine Gearbox • Operation with backlash or with reduced backlash • Low positioning accuracy • Noise generated by the backlash in high dynami

Lower motor torque requirement Reduced positioning error of the motor (1/5 - 1/10) Reduced application inertia; greater system controllability Significant reduction of the overshooting effects Direct motor • Use of a motor with high torque and power • Use of a drive controller, capable of managing the demand for high torque and power • Possible overshooting in dynamic driving conditions • High thermal

• Possibility of axially connecting two or more independent motions • Through-hole to allow passage of shafts and accessory cables • High positioning accuracy for each output axis Coaxial outputs • Use of angular transmissions • Introduction of backlash makes it unsuitable for axis tracking operations • Impossible to specify a throughhole coaxial with the ou

SERVO-DRIVEN ROLLER INDEXER are rotary roller positioners with a constant-velocity globoconical cam and no backlash. The globoconical cam moves an output disc, onto which the needle rollers are installed and preloaded together in order to guarantee the total absence of backlash in any position of the cam. This type of table is ideal for applications that require high speeds on the output disc with medium-high loads. The tables are available in 3 sizes: SRI80, SRI105, SRI130.

Series Installation in any position Compact cast-iron housing Optimized internal inertia High accuracy Prepared for servo-motor with movement programmable by the user High rigidity output disc High dynamic performance Large through-hole in the output disc

Servo-driven Roller Indexer The preloading system, the absence of backlash and the needle rollers guarantee a regular movement along the entire operating cycle, a high rigidity and repeatability of positioning, high yields accompanied by a long life and very low maintenance. The servo-motor fitted on the cam input shaft and secured directly on the side of the box allows free programming of the table, with total control of its movement and speed and the acceleration of the output disc, as well as all the dynamic and kinematic parameters enabled by the drive selected.

Servo-driven Roller Indexer Setting Reduced inertia Mechanism with orthogonal axes preloaded without backlash. The globoconical cam allows reduction of the overall dimensions of the mechanism with the same load capacity, compared to a traditional globoidal cam, thus permitting a large diameter central throughhole. The cam has been lightened and designed to minimize its inertia, in order to promote better control of the motor at all speeds. Direct connection to the motor The large through-hole in the output disc allows easy passage of control and power systems, as well as shafts and other...

Overall dimensions Notes • Reversing the direction of rotation of the input shaft reverses the direction of rotation of the output disc. • Direction of rotation as indicated by the arrows in the drawing. • The two H7 dowel pin holes in the top and bottom housing surfaces are referenced to the throughhole of the output disc. Features Centre distance Internal ratio Mtu_Max Inertia at the input shaft x10^-4 kgm Maximum motor shaft diameter