Multi-Voltage Motors

Simotics SD Pro low-voltage motors from Siemens (Munich, Germany) are suited for mains-fed operation or with a converter for voltages up to 690 volts. There is generally no need to use special filters at the converter output. They offer multi-voltage capability and can be stably operated with all common power supplies. The motors are available in shaft heights 315 to 450, and in the 2- and 4-pole versions, they cover a rated power output range of 250 to 980 kilowatts (kW).

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Motor Restart Relay

ATC Diversified Electronics, a division of Marsh Bellofram Corp. (Newell, WV), introduced the MAR Series Motor Auto-Restart Relay that provides automatic restart to a motor by bypassing the start switch to re-energize the M1 starter coil following a momentary drop or interruption of the control voltage. It is designed for industrial production processes with critical components not in a hazardous area and without permissive circuits. It offers different output interval restart ranges, restart delay ranges, an option for O/L relay L2 disconnect feature, and the choice of 8- or 11-pin plug-in versions.

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Planetary Gearboxes

GAM Enterprises (Mt. Prospect, IL) announced the EPR and PER Series right-angle bevel planetary gearboxes. Featuring a spiral bevel gear input to an inline planetary gear output, the gearboxes are available in ratios of 3:1 to 1000:1, and in a wide range of sizes and configurations. The EPR Series features five output options including three different shaft outputs, a hollow shaft output, and a flange output. The PER employs output bearings and is used in motion control applications where axial and radial loads are minimized. The PER has a metric or NEMA shaft output option. Both are available with motor mounting plates to accommodate most servomotors.

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Alignment Stage

The AU200-50×50-SC alignment stage from Optimal Engineering Systems (Van Nuys, CA) is a high-resolution, high-repeatability XY stage for alignment, assembly, medical, industrial, semiconductor handling, testing, scanning, and optical applications. The linear travel of the X and Y axes is 50 × 50 mm, and the resolution of each axis is 5 microns (non-micro-step) or 0.125 microns (with 20 micro-steps per step motor driver in use). Repeatability is 1.5 microns and positional accuracy is 5 microns. The XY table features a pattern of drilled and threaded mounting holes to facilitate the addition of tooling or fixtures. The two-phase stepper motors with knobs for manual adjustments of each axis are standard; servo motors are also available.

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Stepper Drives

Applied Motion Products (Watsonville, CA) announced AC-powered STR (STRAC) stepper drives for industrial applications powered by AC supply voltages. The drives feature advanced microstepping performance and current control with anti-resonance that improves motor smoothness and torque over a wide speed range. Units operate on AC supply voltages of 90 to 240 VAC and wire directly to 120 or 220 VAC line voltages to eliminate DC power supply requirements. The drives internally convert AC line voltages to high DC bus voltages to drive large step motors at maximum power. Available in two models, the STRAC2 drives provide up to 2.2 A/phase while the STRAC8 provides up to 8.0 A/phase. Each drive operates in step and direction or pulse/pulse control mode. Each drive microsteps to 25,000 steps/rev with a 1.8° step motor (1/125 step) even when command pulses are low-resolution. Users can set up drive parameters — including motor selection, current, and step resolution — using dip or rotary switches; no software is required.

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Slide Guides

NB Corp. of America (Hanover Park, IL) introduced high-precision, high-rigidity, high-load-capacity SGL slide guides. These linear bearings have low-friction, non-stick or non-slip mechanisms that provide smooth linear motion even under high loads. They range in length from 160 to 3000 mm. Six types of blocks are available, depending on the mounting space and desired mounting method. The number of tracking grooves for ball elements or rows of rollers varies by type of glide and width ranges. Both retained and non-retained ball elements are available. Product lines are available for demanding applications as well as products for standard industrial applications.

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Iwaki America (Holliston, MA) introduced 316 stainless steel metallic seal-less pumps. The MP series features flows to 340 gallons per minute and the smaller MMP series is a fractional horsepower series of pumps with flows to 24 gallons per minute. Both series incorporate 316 stainless steel construction, a one-piece non-welded rear casing, and Silicon Carbide “D” bearings for limited dry run operation.

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Voice Coil Motor

Moticont (Van Nuys, CA) offers the GVCM-051-089-05S06 high-speed, high-acceleration/deceleration, zero-backlash, high-repeatability line voice coil motor with an internal shaft and bearing. The compact motor has a high force-to-size ratio with 5.5 lbs. (24.6 N) continuous force and 17.5 lb. (77.7 N) of peak force with a housing measuring 2 × 3.50". The stroke of the motor is 2.75" and the precision-ground shaft with a diameter of 0.2360" has an internal thread. The housing has threaded mounting holes for easy integration into current and future applications. The motor is also available as a complete plug-and-play system including a controller.

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Rotary Valve

RotaVal Ltd. (Wiltshire, UK) introduced an extra-heavy-duty rotary valve for use where handling solids and harsh operating conditions combine to cause abrasive erosion within the valve. It features full on-site component replacement and is used in discharging under adverse pressure conditions and wet materials such as cement, PFA, granite dust, silica sand, and mineral powders. The valve is manufactured in cast iron/SG Iron/Ni-hard/carbon steel. The replaceable body liner can be hard-chromed or ceramic-coated. Rotor shaft sealing options include various types of gland packing, mechanical seals, and air or grease purge.

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Motion Design Magazine

This article first appeared in the October, 2018 issue of Motion Design Magazine.

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