Motion Control

Mini Cylinder

Intelligent Actuator – IAI America (Torrance, CA) offers the RCD Mini Cylinder that is designed to replace compact air cylinders used for short-stroke travel, pressing, and hoisting. It features a crosssection of 12 mm, with a body length as short as 60 mm. The cylinder incorporates a brushless DC motor, and provides maximum acceleration/ deceleration of 1G and maximum speed of 300 mm/s. It achieves 3-point positioning and push-motion operation is possible. Setting the appropriate acceleration/ deceleration rate enables the cylinder to push out a workpiece without impact. The capability for position adjustment based on a numeric value enables the cylinder to achieve precise film tension adjustment. The cylinder can be used to position a workpiece by pushing it from both sides.

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Linear Actuators

K90 linear actuators from Exlar (Chanhassen, MN) are compact, 90-mm frame size actuators available in three performance levels, and allow the use of third-party motors. Featuring dimensions and form-factor consistent with ISO Metric pneumatic cylinder specifications, the actuators are designed to provide a universal solution for linear motion rod-style actuator applications. Three models offer two grades of roller screws and one Acme screw. KX90 actuators incorporate a high-performance planetary roller screw for applications in industrial automation, mobile equipment, process control, and other applications requiring millions of inches of travel under load.

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Pneumatic Air Cylinders

NITRA™ E-Series pneumatic dual-rod guided air cylinders from Automation - Direct (Cumming, GA) are designed for applications that require precise alignment or have large side loads. The devices are interchangeable with other popular brands of cylinders. The double-acting cylinders are constructed with extruded aluminum housing and switch mounting tracks, dual chromeplated stainless steel guide rods, and bronze bushings. The cylinders feature a maximum operating pressure of 142 psi, and are available in eight bore sizes from 12 to 63 mm. Available stroke lengths range from 10 to 250 mm, depending on bore size.

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Position Sensors

ASM Sensors (Elmhurst, IL) offers the PMIS4/PMIR5 non-contact measuring system developed for rotary applications. The system provides high EMC protection, large guiding distance tolerance, and signal performance up to 327,680 pulses/360°. The incremental system consists of a PMIS4 sensor head and a PMIR5 incremental magnetic ring. The sensor head is made of a fully enclosed, shielded metal housing, offering protection against electromagnetic interference and thermal overload. Guiding distance is ±1 mm. Available output types are HTL, TTL, and TTL24V.

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Motion Controllers

ADLINK Technology (San Jose, CA) has released the PCI- 8254/PCI-8258 motion controllers that provide servo updates up to 20 KHz through hardware-based PID-FF control loop and secondorder filters, time-deterministic trajectory and velocity planning, comprehensive application functions, and diagnostic and control utilities. The program download function can execute up to eight individual tasks simultaneously, providing control performance in real time, and conserving CPU resources. The controllers also provide multidimensional interpolation, as in 3D linear/circular/spiral interpolation, for contouring applications in manufacturing industries such as laser engraving/cutting, glue dispensing, and others.

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Linear Stages

Newport Corp. (Irvine, CA), has introduced the FMSxxHA high-accuracy FMS stages for surface metrology applications. The stages are available in 100-, 200-, and 300-mm models. With all-steel construction, the stages combine high stiffness and thermal stability. The crossed roller bearings have an anti-creep feature to provide smooth and straight motion. The steel ball screw is designed for highspeed motion. The stages are driven by a stepper motor, with a linear encoder that provides on-axis accuracy down to 1μm and submicron bidirectional repeatability.

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Linear Scales

Model LF series linear scales from HEIDENHAIN Corp. (Schaumburg, IL) are used on highaccuracy machine tools, jig bore and grinding machines, and linear motors. The LF 485 and 185 incremental models feature very high repeatability and defined thermal expansion behavior. From a grating period of 8 μm, the interferential scanning principle of the LF scales produces scanning signals with a signal period of 4 μm. These scanning signals are largely free of harmonics and can be interpolated. Accuracy grades to ±2 μm are possible. The scales also offer resistance to contamination through the use of SUPRADUR steel scale tape together with a scanning ASIC with large scanning window.

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