Motion Control

Magnetic Encoders

Baumer Electric (Southington, CT) released four magnetic encoders for harsh or contaminated environments. The devices come in diameters of 30 and 40 mm. The EcoMag 30 and EcoMag 40 are incremental encoders, offering resolution from 2 – 1,024 ppr. Their absolute counterparts, the MagRes 30 and MagRes 40, provide single-turn resolution up to 10 bits and SSI output. Maximum rotational speed for the sensors is 12,000 rpm. The 30 mm sensors have shaft diameters of 5 mm; the 40 mm hollow shaft sensor accepts shaft diameters of 12 mm. Both models are resistant to high shock and vibration.

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Corrosion-Resistant Bearings

MRC Bearing Services (Kulpsville, PA) released the custom-engineered “HNCR” steel bearings made from high-nitrogen corrosion-resistant steel. The bearings display a hardness of 58 HRC, and have an extended fatigue life. Chromium has been added to further augment durability and corrosion resistance. The bearings may be customized.

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DIN Motion Controller

From Trio Motion Technology (Pittsburgh, PA), the MC302X DIN rail-mounted motion controller features two axes; the first can be configured in software for servo (with encoder feedback) or high-speed stepper control. The second axis may be either a reference encoder or a stepper axis. Differential line driver stepper outputs can be configured for standard simulated quadrature encoder outputs to synchronize multiple units. Each axis can run moves using linear or circular interpolation, electronic cams, and gearboxes. Two inputs may be configured for accurate hardware registration. The device operates from 40 mA to 24 V DC, and has four 24 V inputs and four bi-directional input/output channels built in with optical isolation. Other features include an RS232 programming port, and a user selectable RS232/485 port for peripherals. The controller is programmed using Trio BASIC.

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Ball Splines

Released from THK (Schaumburg, IL), the SLS/SLF Ball Splines feature caged technology, allowing for smooth motion. A synthetic resin cage cradles each ball, separating it from others, while spaces between rolling elements retain the lubricating grease to act as a lubrication system. The units feature a rigidity of ±10%. Outer shaft diameters are available from 15 to 100 mm. Low-noise options are available.

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Linear Actuator

From Exlar (Chanhassen, MN), the Tritex™ Series of electric linear actuators, combining a brushless servomotor, servo amplifier, and position control in one unit. Up to 500 watts of continuous power can be applied to the actuator’s brushless servomotor. The standard product is rated IP54 with optional IP65 rating for wash-down and fluid applications. Mountings include front flange, rear clevis mount, side mount, and trunnion mount. The unit is available in standard IEC metric dimensions. Other features are: 24 and 48 V DC power, 25" per second maximum linear velocity, 1,250 lbf maximum continuous thrust capacity (2,270 lbf peak), and low resolution incremental feedback. Customization is available.

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Ethernet Controller

Galil Motion Control (Rocklin, CA) released the DMC-40x0 Ethernet/RS232 controller family as part of the Accelera line, coming in 1- to 8-axis formats. Accepting encoder input frequencies up to 22 MHz and providing servo update rates up to 32 kHz, the line can complete program instructions in 40 microseconds. The device operates in a standalone configuration or can be interfaced with a PC via the Ethernet 10/100Base-T or RS232 ports. Memory is up to 510 symbolic variables, 16,000 array elements in 30 arrays, and application program space up to 2,000 lines × 80 characters. Mode of motion capability includes: point-to-point positioning, position tracking, jogging, linear and circular interpolation, contouring, electronic gearing, and ECAM. Other features include isolated I/O, eight uncommitted analog inputs and outputs, and PID compensation.

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DC Gearmotor

Midwest Motion Products (Watertown, MN) released the Model No. MMP-S28-400A GP81-046 BR-015 DC gearmotor. The device accepts any 24 V DC source. The gearmotor is reversible; the output is rated for 61 Nm continuous torque at 43 rpm and 100 Nm peak. Motor windings for 36, 48, 60, and 90 V are available. The integrally mounted fail-safe brake requires 24 V DC power and features a holding torque of 15 in-lbs. Mounting is accomplished with four “face mount” M-6 threaded holds, equally spaced on a 65 mm B.C. diameter. Dimensions are 3.2 (max diameter) × 13.3" long, and the unit has a keyed output shaft diameter of 19 × 49 mm long.

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